Portable Air Conditioners – Why you shouldn’t like them


Air conditioners are pretty cool. *awkward pause* But there’s an increasingly
popular variety of them that figuratively and literally sucks. That would be… these bundles of joy. Portable air conditioners seem to be taking
the world by storm, or at least have taken the air conditioner isle of the hardware store
by storm. But are they any good? Do these cold-making machines have what it
takes to usurp the traditional window unit? No. Portable air conditioners are actually kinda… bad. Now it’s not like they don’t work! And some of them aren’t quite as bad as
most. Plus, they can really come in handy. This one here is serving duty precisely because
the window it’s venting through isn’t really suited to holding a window unit in
place with any sense of confidence. And I know because I tried. Yes, this here is the symbol of my shame. The air conditioner that was never meant to
be. But luckily for you I didn’t return it because
it’s gonna be a great visual aid! Now, in this video I’m going to argue that
if you need an air conditioner you should gravitate towards these simple window units
and away from those trendy portable units *if you can*. And to find out why, we need to learn a little
bit about air conditioning. Air conditioners are mechanical devices which
collect and concentrate heat energy in order to move it from one place to another. The cold air they create is in fact ordinary
air that’s had its heat energy sucked right out of it. And of course, we can’t just bottle that
energy up (though that would be super cool if we could figure that out) so instead we
move it somewhere else–usually to outside air. And inside every air conditioner you’ll
find three essential parts that make that happen. This is the basis of nearly every air conditioning
and refrigeration system in service today. The black cylinder contains a compressor which
squeezes a gas called a refrigerant into a small space, decreasing its volume and increasing
the pressure it’s under. The high pressure gas, which has now gotten
quite hot thanks to the fact that it just got compressed, travels through these pipes
into the second key component; the condenser. The condenser is a heat exchanger designed
to cool that hot gas down as quickly as possible. The densely spaced fins increase its surface
area to speed up the heat transfer, and a fan helps to speed it along even more by blowing
air across the fins. Since the refrigerant is now pressurized,
its boiling point has increased. And in fact, its boiling point has increased
so much that once we get it down to something like 130 or 150 degrees, it will condense
into a liquid. So, as the hot gas winds its way through all
these pipes and its heat energy gets transferred to the air, it slowly turns into a liquid,
releasing a ton of heat energy as it does so. Now here’s where the magic happens. That liquid is being held back by a metering
device such as a thermal expansion valve, to keep the pressure high in the condenser
and limit the amount of liquid refrigerant that can pass through. This basic air conditioner uses a capillary
tube, a long copper tube with a very small internal diameter, to restrict the refrigerant
and thus limit its flow. But once it makes it through to the other
side, it finds itself in a second heat exchanger, called the evaporator. This one is functionally identical to the
condenser, except the pressure inside here is much, much lower thanks to the suction
created by the intake side of the compressor. Once inside here, the refrigerant can relax,
and its boiling point suddenly shoots way way down, like into the well-below-zero territory. And that means it’s gonna spontaneously
boil –or evaporate– because, well, it’s too hot for it to remain a liquid. But to change phases back into a gas, it needs
to get energy from somewhere. And luckily, the fins of the evaporator help
it absorb the energy in the room, and the effect is that the room gets colder. In effect the heat energy inside the room
is being used to warm up the refrigerant as it evaporates. Thinking about this can be kinda weird because
we like to think of the evaporator as getting cold, which it is, but it’s getting cold
because it’s pulling heat energy out of the air and into the refrigerant inside of
it. Coldness is really just less concentrated
heat energy, and since heat likes to go towards cold places to spread out, it naturally finds
its way (with the help of a fan). After the refrigerant has absorbed as much
energy as it can, it reenters the compressor where the cycle starts all over again. Once it’s under high pressure, it will be
able to condense into a liquid again, releasing the energy it just absorbed to the outside
air through the condenser. Now, I don’t want to get too far into the
physics of how this works, nor talk about what makes refrigerants special and why they
have been and continue to be a notoriously tricky set of chemicals to manage, so all
I really need you to know for this video is there’s a compressor, a hot side, and a
cold side. If we’re cooling a room, we want the hot
side outside and the cold side inside. Then we can move the heat energy from inside
the room to the outside air, cooling the room. So, let’s take a look at where these components
are when the window unit is in operation. When resting in a window, the bulk of the
machine is actually outside of the space it’s cooling. The compressor and condenser are both outside,
and thanks to the generous amount of styrofoam insulation, we get a pretty good thermal barrier. When cooling, none of the actual air in the
room is moved outside–only the refrigerant, and thus the heat energy it’s absorbed,
makes it out. This maximises efficiency. If you have a central air conditioning system,
you probably have what’s called a split system. Here, the compressor and condenser (along
with a cooling fan) are contained in a single unit which sits outside, and copper refrigerant
lines are run into the building to a separate evaporator located in an air handler or incorporated
in a furnace. See? It’s a split system, as the evaporator and
condenser are split apart. These systems are highly efficient, with the
entire hot side located outside and away from the living space, and only a tiny hole is
required in the home’s thermal barrier to move the refrigerant in and out. Alright, and now let’s take a look at a
portable air conditioner. You may notice that the entire machine is
inside. That means not only is the cold side inside,
the hot side is inside, too. Well. That’s not great. We want the energy being absorbed by the evaporator
and released into the condenser to make its way outside somehow. So, what to portable air conditioners do? They suck in indoor air through these vents,
blow it across the condenser to cool it off, and then push it outside through that hose. That last sentence is very important. They pull in air through these vents, air that they just cooled, mind you, and blow it outside. That sounds pretty friggin stupid, just on
its face. Now, it’s not like it doesn’t work. If these didn’t work they wouldn’t be
nearly as popular as they are. Also! Two-hose portable air conditioners, which
suck in *outside* air to cool the condenser and then blow it back out in two separate
hoses, are available, but they are an increasingly rare part of the portable air conditioner
universe and the vast majority on sale are single-hose units just like this one. So, if this machine relies on drawing air
in through these vent slots to cool the condenser, and then has to barf the now hot air outside,
that means not only is it sacrificing some of the cool air it just generated, it’s
also creating a low pressure environment in whatever space it’s in. Now the air pressure outside room is greater
than the inside. And that means that outside air is going to
make its way in through the walls to replenish the air that just left. You can’t just expel air from a room without
it getting replaced somehow (otherwise you’re in a vacuum chamber and I advise you leave as soon as possible). And what replaces it is ultimately the hot
outside air that you’re fighting against. Genius! And thus we’re at the core of this issue. Single-hose portable air conditioners will
always be significantly less efficient than a window unit because they’re not just pulling
the heat energy out of your room. They’re also pulling the air out, too. In fact, if you go to a hardware store and
take a look at a fresh assortment of portable units, you’ll often find that they have
two cooling capacities listed these days. Why? Well, because newer testing methods are accounting
for the losses brought about by this hose, so while the unit may technically be able
to move 8,000 BTUs per hour, thanks to the warm air it’s drawing back in (as well as
its own cold air it’s blowing back out) it’s effectively only moving 6,000 BTUs
per hour. So, basically it’s 25% less efficient. But it’s actually much worse than that! This little 5,000 BTU window unit consumes
455 watts. If we take a look at this 5,500 BTU portable
unit from LG, you’ll see that it uses over a kilowatt! That’s more than double the input power
required to generate only 10% more cooling. A window unit that consumes that much power
can produce roughly double the cooling capacity. So yeah. Eek. Now I’m not here to say that these are terrible
devices and you’re a fool if you own one. ‘Cause I’d be calling myself a fool twice
if that were the case. But I will say that in general, these should
be your last resort. If you have the option to use a traditional
window unit, take it. It’s much more energy efficient and it will
cost less to run. And yeah, I get it. They’re ugly. They block your view from the window. They’re not exactly attractive from the
outside either. But it’s not just energy efficiency that
they’re better at. Air conditioners are noisy. They’re noisy because they’re mechanical
devices, with a buzzy compressor and two droning fans moving air around. With a traditional window unit, the compressor
and one of the two fans are outside. Thanks to that thermal insulation, you get
a lot of sound insulation, too. You’ll certainly notice a difference when
the compressor is on versus when it’s not, but it’s often pretty subtle. Especially because, as is the case for many
windows units, the same motor drives the indoor blower fan and the condenser fan, so the only
part that cycles on and off is the compressor. [sound of fan running] [sound level increases slightly as compressor kicks in] And of course, split systems are even quieter because the loud parts are nowhere near the
living space. [compressor and fan switch on] Compare that to this thing. Not only is the compressor now inside the
room you’re trying to work or sleep in, but so is the condenser fan. The result is that it’s not that noisy when
it’s only running the circulator fan. But when its thermostat calls for cooling,
it gets way, way louder! Suddenly, the compressor kicks in (which again,
is inside the room) and a second fan turns on to expel the heat from the condenser. It’s a good thing the condenser fan shuts
off when it’s not actively cooling, as otherwise it would suck even more air out the room. But it means there’s a stark difference
in noise levels between not cooling. [a moderately quiet fan noise] And cooling. [compressor kicks in, and a second, much louder
fan spins up at the same time] [it’s really quite dreadful] And if you’re trying to sleep in the same
room as one of these, you’ll have to put up with it going from pretty quiet to loud
as hell and back over and over again. This is a cheap in-house brand unit from that
place where you save big money so I wasn’t expecting it to be whisper quiet, but I’ve
also got a more proper unit from LG that, while a little more elegant in the way it
handles the transition from cooling to not cooling and vice versa, is still much much
louder when it’s cooling. [fan noise] [a second fan spins up] [compressor kicks in] I’m a pretty heavy sleeper, and even for me it can be a challenge to ignore the thing
and fall asleep. And another thing to consider is that while
window units steal a bigger chunk of your windows, they don’t steal your floor space. Portable units aren’t small and they can’t
sit flush against the wall thanks to the hose, so be prepared to re-arrange a little furniture. And by the way. That hose? It gets hot! That heat energy it just concentrated isn’t
gonna go away without a fight, and since this hose isn’t insulated at all, some if it
is coming right back into the room. Fantastic. But, I’ll admit. Portable A/C units are handy. Really handy. They don’t need proper installation like
a window unit does (which is quite a pain, I might add). They can easily be moved from room to room
thanks to the wheels they’re on (that’s why the call them portable). And they fit window types that might otherwise
be unable to accommodate an air conditioner, such as vertical windows or even patio doors. You could even run them through a small dedicated vent, if you choose. But sadly, their single-hose design makes
them, honestly, a terrible device when it comes to efficiency. I’d like to see more double-hose units available
for sale. They’re still gonna have the noise and floorspace
disadvantages, but they at least regain much of their efficiency back. Last year I tried a portable mini-split system,
with a separate outdoor compressor and condenser unit, and an indoor evaporator unit connected
via a flexible refrigerant hose. Sadly, my unit had a refrigerant leak and
stopped working after a few weeks. It looks like that’s a common problem, but
let me tell you it was blissful while it worked. Quiet, efficient, and effective. I’d like to see this product get more development,
but I also understand that it’s got way more limitations than even a window unit. Unless you want to get creative with some
sort of exterior wall bracketing, this is limited to a ground-floor room or a room with
a balcony or something similar. But anyway. If we’re gonna keep using these things,
can we please get more dual-hose units? I get that they’re less flexible, particularly
with vertical or narrow windows, and so are probably less desirable, but hopefully with
more people aware of the energy losses caused by continuously pushing the air out of your
home, we’ll see increased demand. Still, if you’re looking for an air conditioner
in a situation where a window unit could work–you’re seriously better off going with the window
unit. Contrary to what you might think, portable
units are certainly not an upgrade. Other than their portableness. That’s, that’s pretty cool. Thanks for watching, and I hope you found
this video to be as cool as a correctly charged air conditioning system. I do want to explore air conditioning a little
more because I find it fascinating. The way that we exploit the physical properties
of certain gasses to make heat energy move where we want it to go is kinda mind-blowing. Oh, and by the way, not all refrigerants are
crazy complex chemicals. Some small refrigerators and air conditioners
are starting to be charged with propane. Propane, also known as R290, is becoming an
increasingly common refrigerant thanks to its abundance and relative environmental harmlessness. Unfortunately it’s also flammable which
makes servicing these a little tricky, and makes it unsuitable for larger units which
need a lot of refrigerant. But especially for small, cheap units like
these things that are likely to simply be disposed of when they die rather than actually
serviced, it’s a great opportunity to use it. This machine, though, while it is charged
with a flammable refrigerant, uses difluoromethane, or R32. Of course, thanks to everyone who supports
the channel on Patreon, with a special thanks to the fine folks you see scrolling up your
screen. If you’d like to join these people in supporting
the channel, there’s now a new perk! All patrons have access to the patreon-only
Technology Connections Discord server. So, if Discord’s your jam, you can join
these other folks by linking your Discord account to your Patreon account. And as always, early video access, occasional
(very occasional) behind-the-scenes videos, and other patreon-only stuff is available
to you as well. Thanks for your consideration, and I’ll
see you next time! ♫ icy smooth jazz ♫ …the cold air they create is in fact ordinary
air, eh. Eugh, eugh blaugh ugh. I’m–this tone is all wrong. OK… maybe move at like a pace that makes
sense. Yeah, that’s written wrong. Well, that’s fine. And now I will record that line as written! Or at least have taken the hardware isle of
the air condition… the hardware! Arghh… nope. Air conditioners are nois… I should move this again. Coldness is really just less concentrated
heat energy, and sint he… Augh! Sint. Since heat! SINCE heat! It’s a wo…the Since! Since is the word. Since.

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100 thoughts on “Portable Air Conditioners – Why you shouldn’t like them”

  1. Mr Meener says:

    this guy is a smart bastard and into what he is doing

  2. Aaron Kutra says:

    They do have their place. They work great if your main A/C goes out and you need something as a temporary fix. I have 2 of them. So far they have been lent out 4 times this summer to friends. Otherwise, I keep them stored in a closet until they are needed again.

  3. S Aurelius says:

    Someone please comment. I have a single hose system and have to rely on the central AC to do most of the work. Unfortunately I live with family that likes to put the AC on 75, 78, or just not on at all at night. To make matters worse, I live in a complex that doesn't allow window ac units. So, I'm looking at dual hose systems, but I don't know how well they work if it's actually hot and sunny out. I like my room to be at 68 degrees since I have sinus/asthma issues. The only other thing I can think of is calling someone to force to complex to let me put in a window AC. I have a doctor's note, but apparently that isn't isn't good enough.

  4. Jonathan Lewis says:

    don't tell me what to do.

  5. Una Salus Victis says:

    i have used many of these, some are virtually trash, others, are actually pretty decent, the best used an intake and outlet hose in the window still not ideal but, better then those that suck house air out over the radiator(hot side)… bad design but cheap to make… another REALLY big advantage is, you can use the intake to suck hot air from top of the room, and blow it out as it cools the lower air, this saved our ass when "camping" at a buddies grand parents cabin, we had to rebuild the central air system, (fan motor seized up, and it needed more work, thankfully their son is certified to do that work, and im much better with my hands(and, can do anything he can, and more since im an eletronics/pc tech… ), that floor unit kept us from melting during the hot of the day, for 2 months then we got the central air system redone(replaced all the conduit and added insulation in the floor, then added some in the attic, also added a heat triggered attic fan that also blows open its vent when it turns on… used the floor unit in the shed after that so we could work during the day cutting materials and such.

    you can insulate the hose, i would…

    dual hose versions are just..alot better…

    oh we also put one in the loft of a friends A frame home venting out the same vent as the dryer, it was sucking the heat out, and keeping the place cool, (the place has horrible leakage anyway, when he gets a new roof they are doing sheet metal and adding more insulation under it, and adding solar, but for the last couple years, that thing in the loft rafters (i used some tie down straps he use to use to for his motorcycles to secure it up there, the place will come down before it comes off the place i secured it…(it has a remote but also has the ability to sync with a phone(up to 4 actually) and you can control it that way…

    anyway…good video.

  6. Dee Toxinz says:

    Woah my dude you just gave me a hell of a project for this weekend. Figure how to do exactly what you said would be super cool if we figured that out

  7. Terry Smith says:

    I wish I had seen this before I bought mine. It does not cool well at all. I have it in a out building and when the compressor is running, it creates such a vacuum inside that the door is very hard to open. Also, you can feel the hot air being pulled in through every tiny opening. I'm not happy at all with it.

  8. ledzeppelin1212 says:

    Great video. Thanks a lot!

  9. Bo Lockhart says:

    They're not all like that. The one I bought several years ago has an intake that pulls air from the outside to grab the heat generated from the unit and then exhausts that warm air outside so that there is no vacuum created in the room. Look for a double hose unit that has an intake and an exhaust tubes that fit into that flat plastic piece that fits into the window.

  10. Green Creeper 3000 says:

    Ac Kicks on
    Game "Game over yaaa"
    Nabers hear a window shader

  11. Prakhar Srivastav says:

    This machine is plain stupid

  12. goodcat1982 says:

    Didn't watch the video, the title was stupid enough. They keep me cold when it's hot and saves me from spending a fortune on built in aircon. What's not to understand?

  13. bharat Jethava says:


  14. Wreckedbread says:

    We too don't have any other choice than to use the portable AC, but even though it's not that efficient, it still cools down the living room.

  15. Stephan Weinberger says:

    I dont understand, why dual-hose isn't standard. You can just as well use them as single-hose (simply dont connect the intake host) – it's only a matter of how the intake of the machine is designed (i.e. if it's able to connect to a hose).

  16. Sabal says:

    I wish i could use a window air conditioner. it worked so much better than my portable one but having large side opening windows it just didnt work. Had to put plexiglass and tape it into the window yearly. IT was not worth the struggle.

  17. kalhana1 says:

    Also, the motors generate heat (some % of that ~1kW input, maybe around 20%). And since the whole system is indoors, most of that heat will end up inside the room.

  18. chet mccain says:

    A few milk crates can allow the hose to be shorter not sure how much it helps but shorter hose less but less hose less thermal leakage

  19. Tom K. says:

    Who the hell has such a pitiful and miserable life that they DISLIKE a video giving them nothing but clear and reliable information about something you have to be interested in to watch it in the first place?

    A great video with a clear, concise, and most important of all, informative delivery.

  20. mesedrew says:

    All in all if you need air conditioning! If your in a house and not an apartment that has forced air heating and ductwork, central A/C is a better investment!

  21. Johnny Red says:

    I don't see how a 2-hose unit is any better. Let's say it's 100 degrees outside. A one-hose unit pumps hot air out thru the exhaust hose, and air from somewhere–from other rooms or from outside–comes in to replace it. The air that is drawn into the back of the unit includes air that was just cooled–maybe this results in additional cooling? Anyway I see little difference between drawing room air into the back of the unit vs  pulling it in thru a hose from the outside. In fact it may be worse because you're pulling in 100 degree air, rather than air that has already been cooled somewhat.

  22. El DD says:

    I have a serious question
    That you didn’t cover or mention

    Does the window AC pull in air from the outside ?
    I know you mention it pulls in from the front
    But I’m curious if it inhaled air from outside and relaxes it inside the house

    Thank u

  23. Joe Brantley says:

    So your exhaust in your bathroom is bad too? Also if it’s hot outside your head pressure is higher making your amps higher and costing more. Especially with the pressures of 410a. So I disagree with you totally. Also they call them window shakers for a reason. And they look like sh#t sitting in your window. Being in the hvacr field for 35 years I will have to totally disagree all the way around.

  24. aj brown says:


  25. punishedexistence says:

    About a year ago the a.c. at the house stopped…not a good thing in SE missouri in summer. Through some loan work and such, we got a heat pump a.c. unit. Cost about 4 grand. Sounds like a lot but the energy savings are insane. The house is all electric…yeah it sucks but it's what we got for now…the electric bills were through the roof before. After this new unit, it went from over 300 bucks a month in winter to maybe 175. Basically it just reverses the air conditioner in winter to heat the house, and it works pretty damn well! Of course, when it gets below about 15 degrees it doesn't work so well, but it doesn't get that cold here too much…unlike my old place in Cleveland…when it gets too cold it uses either electric heat or gas heat depending on how it's hooked up. But it's a kick ass system that has nearly already paid for itself and it's pretty efficient. So in contrast to everything here in this video, I can say that portable units are convenient, but in the long run you're gonna pay out the ass to run one. Window units are still ok in my book. They do the job well along with being pretty efficient.

  26. Greg Hale says:

    Nice video and informational! Good job! (and I had to use one of these in my bedroom temporarily. Yes, they ARE loud)

  27. MEJAW says:

    very informative , ty

  28. Aaron Bieber says:

    It would be worth doing a video covering a couple of the different kinds of HVAC units. I was fascinated to learn about the "water source heat pump" that I had in one of my previous apartments, which is similar to a split system except that it uses water to move the heat energy from each apartment unit to a central cooling tower.

    These portal ACs that you covered here literally use air to move the heat energy around, which is very inefficient.

    You could also cover the "swamp cooler" technique, which is different from phase-change in that it takes advantage of natural evaporation, but at the cost of dramatically increasing humidity. Perhaps you saw the "dessicant cooler" video by Tech Ingredients (

  29. Geo Synchronous says:

    He is correct. I once had a dual hose unit. It worked very well. The manufacturers figured out how to reduce the components inside, thus reducing their cost of making it but it makes the unit much less efficient.

    Using the air you just cooled….. to recycle it back through the unit….. to then recapture the heat that the unit just took from the air…. then blow it outside ????? What were they thinking? Oh I know. PROFIT. Not quality.

  30. Brad Hansen says:

    they should have a second hose that reaches up to the ceiling where the hot air collects and pump that across the condenser and then outside instead.

  31. Bernel Nery says:

    I saw that you did try those mini split system, aka Rollicool. I'm sad to hear that they leak. I was actually wondering why or what did you do to them? Did Rollicool have warranty?.

  32. Anthony Corbin says:

    I have a RV and I cant get a Window unit to stay in the window it keeps falling out and the cable rips off the ac and I have to constantly rewire it and the ceiling AC's are dead. How do I get AC without the ceiling AC's in a RV Might also add im in florida which is a hot state to be in

  33. Wtf Happened says:

    Single-hose sucks… Dual-hose work even as heat-pumps.

  34. John Johnson says:

    So, two 4" hose units are ok?

  35. Robert Veach says:

    Excellent video and technical description. Just subscribed.

  36. Josh Rosario says:

    Has anyone attempted to build a duct around the air intake and plumb that outside?

  37. EBjamin says:

    Great video!

  38. drivethrupoet says:

    when you live where it's 100 deg F for about 25% of the year – these are helpful to add in rooms that won't cool with the rest of the house on central A/C. It takes some of the load off an old HVAC, too. I'm pretty sure this $300 portable air unit in an upstairs bedroom full of the kid's electronics – has prolonged the life of the central system that's going to be as much as $10k to replace.

  39. Bad Wolf says:

    Spaceship Earth t-shirt!

  40. Michael Smith says:

    Mini splits are where it’s at

  41. Chike U says:

    Ty sir have been trying to figure out the best way to cool my garage. Definitely used a portable for overall cost but I might just go ahead with a mini split

  42. Eric says:

    You can get insulated ducting to replace the uninsulated tube.

  43. Frankie says:

    best explanation of ac units out there

  44. Krisham Ray says:

    0:00 Bdmmmtsss

  45. bladedspokes says:

    TL;DW: The "two-hose" portable A/C units are not as terrible since they use outside air to cool the condenser. But the single-hose units that use inside air just end up pulling outside air into the house, which drastically reduces the effectiveness and efficiency of the units.

  46. Michael Holmes says:

    As a HVAC guy, you did a nice job explaining the reason why the portable units are not energy efficient – good camera work too…! 🙂

  47. MAD MAX says:

    everyone will be on the fence of which one to get…how much..etc
    but when youre seating your balls off, you wont care as much. When it gets super hot and humid, your balls stick to your thighs like Super glue, using a spatula is the only way to get them free. So, use a portable one, as some neighborhoods, HOA, ban those.

  48. John Hodgson says:

    I have yet live in a place with a window that a window unit fits. The dual hose unit I use does the job just fine, my window unit is stored somewhere.

  49. Sixto Lavalle says:

    Solid video bro !

  50. Trucker Nation says:

    I’ve never enjoyed science so much until now.

  51. Seth Bergman says:

    I love my portable AC unit. It easily heated my full size bedroom and attached bathroom here in Alabama summer (90+) while my heat pump was not working (faulty capacitor). I've even used my portable AC while camping.

    I do keep the exhaust tube as short as possible and I elevate the unit near the window to make that easier. Cost was about $300 for my LG unit. Just finished the video. Great description and I appreciate the breakdown. I think I will purchase a window unit just to keep on standby and maybe keep my portable unit for camping (at non primitive sites).

  52. Steven Norton says:

    I'd like to add (for anyone that cares), that single-hose units only pull air in and the same air gets exhausted. This creates a negative pressure and any cracks in the window, or underneath door entries/exits will actually PULL air back in and typically that air is much warmer than the room you are trying to cool. This is why dual-hose is also beneficial because it's taking air from the outside and doing the opposite. Basically, this caused my unit to be on a lot more than it should have because it had to fight with the air being pulled in.

    Not sure if it was implied in the video somewhere after watching, but adding that info just in case.

  53. Alex Rhinehart says:

    So would a two hose portable air conditioner be a good idea?

  54. Ben Fisk says:

    bro you need a girlfriend youre complaining about air conditioners

  55. Shobuster says:

    You don't have to worry about the pressure outside vs in if you live in donald trumps hair spray room.

  56. Michael Archer says:

    Good info. Thanks!

  57. therealhardrock says:

    So where did you set up that portable air conditioner, where were you planning to set up that window unit, and where were you shooting that central air compressor?

  58. Matt Shroyer says:

    Although I agree that these are not the best. (My electric bill is through the roof and the water is leaking from the unit) I live in a basement efficiency apartment and the only window that opens is low to the ground and it’s a pain in the rear to get it in an out each year but next summer I’m not using it

  59. Sky Noris says:

    Really great video. Love the detail. I myself have had both the window unit and the portable now. The window unit I bought ten years back was fairly noisy. In fact it made it difficult to hear the tv at times. Fast forward to July 2019. After a little research and going over the numbers I ended up buying a duel hose portable system. I hesitated for the efficiency factor. I was well aware of that fact. But to my surprise the system is working beautiful and is much more quiet then my window unit honestly. I do hear the compressor kicking on and off but it's much more quite then the window unit. While I don't think I will ever buy a single hose unit. The duel hose unit is fine for now. 😀

  60. kilgarragh says:

    bottle the energy up and realese it in the winter so your not wasting any heat energy!!!

  61. Patricia Smith says:

    cant thank you enough for your explanation – certainly settled some questions for me.

  62. JOE PRETE says:

    How did you end up with a window, that goes down to floor level?

  63. Robin Khlop says:

    12:00 Fan-tastic. Ha!Ha!Ha!

  64. nan zeng says:

    we here in asia always use a split unit and it usually works many years before the coolent leaks, even then it only needs to be recharged by a pro and it costs nothing….

  65. J P says:

    What's your opinion of evaporative coolers?

  66. Jackey Niraula says:

    No wonder Groupon is littered with these useless crap for almost under cheap $200, I wondered why? Now I know my answer. Thanks.

  67. flilguy says:

    Wish I could have seen this in 2007 when I bought a portable A/C. It used a lot of kilowatts and didn't cool very well. It added $65 to my electric bill and my central only added $35 and could cool the whole house. I got my central A/C fixed and won't go any other way again!

  68. Vetar 33 says:

    Meanwhile in Europe: We install heat pumps that doesn't block our windows and works in both winter and summer

  69. Drinksalotobeer says:


  70. Brad Smith says:

    Your Theme Music is the best out of all the channels I follow. I bought one of those Portables & found out right after they only slightly cool a room vs the Window types. "better than nothing"

  71. seth Gestro says:

    so is this how they plan to control global warming?

  72. Salad Fingers says:

    We use wall mounted split systems where I live, mainly Japanese brands. They are efficient, silent, powerful and can also produce heat just as efficiently. Nobody I know uses those window units nor those portable ones.

  73. Xandros Darkstorm says:

    After watching this video i searched "air conditioner noise" and youtube showed me this:
    Now i am not sure that noise is actually a bad thing. Many people seem to like it.

  74. Lily Flower says:

    Listen everyone!! I found a way to get around most of the problems with portable air conditioners! 1: You need to find a plastic box that has the same size as the air conditioner. You then place it on top and attach it with some tape. 2: You cut out a hole in the top of the box and attach a large hose to it (one of those flexible hoses meant for ventilation). 3: You then place the air conditioner in another room and simply move the hose inside the room where you're sleeping. 4: Place a carpet over the door opening, so the cool air won't disappear too quickly. It's not the most elegant solution, but it works. 🙂

  75. VenomStryker says:

    You're welcome…..:-)

  76. Brent Dugmore says:

    You forgot about the condensation created from this effect. I’m not sure how it works exactly but we all know that A/C’s need a place to expel the condensation and the portable ones suck so bad at that too. You need a damn bucket or a freakin hose. That pisses me off!!!

  77. macmacox says:

    the only thing I don't like about most window units is that they put the temperature probe next to the cool air output.. a remote thermometer (either wired or RF) would let you actually use the automatic fan on/off rather than having to keep the fan on at all times to get any cooling.

  78. Steve Waclo says:

    And don’t get him started on dealing with condensate.

  79. ElectronSpark says:

    I bought a duel hose unit in May this year. It took some searching but I found one at (do not appear to be available there now).

    I jinxed myself by buying it as we had a mild summer (W. Washington). I think we used it 4 times.

  80. Arsa daniswara says:

    Lu nyolot njing

  81. miletech says:

    Let me save everybody 16 minutes. Portable units are bad because they're less efficient since the heatsink is on the unit inside the house and some hot air will transfer into the room.

    Why did it take you 16 minutes to explain that?

  82. Kernelpickle says:

    Unless you’re renting, you could always just cut a hole in the wall (and for some reason you can install a mini-split system, which I’ve stated to prefer over central AC.)

    A “window” unit, flush mounted in a hole in the wall, in some cases COULD be preferable to a mini-split (not portable piece of shit you got) because it won’t put a massive ugly wart on the inside wall of your home—but if you’re like me, and prefer the exterior aesthetic of your home to look better, then the mini-splits are the way to go.

  83. T-Rolla St. Dusky says:

    Wow, thanks man emptying shopping cart 😂😂

    Also, the 1.9k dislikes are from the porta owners lmao (plus a small percentage of porta companies) 😂😂😂


  84. Mitch Brown says:

    Can we talk about the Japanese air conditioners that are a split system for one room?

  85. gregory grimm says:

    So, you mean you did not check/measure that window before buying that window unit. SHADE

  86. Don Brown says:

    Hey of u want to explore a unique cooling system look at the absorption cooling method common for RV refrigerators where a Hot Flame is used to cool ! I work on them and the theory even gives me a headache!

  87. Kevin Burrell says:

    It's horrible and I will never buy one again. It leaks water all over the place plus you have to put a bucket near the thing so it can leak. It's also loud

  88. IDrink2Much says:

    Thanks! The air outside my bedroom door in the living room is always much cooler, however I was blocking the gap under more door to keep the refrigerated air in. After hearing that portable ACs push air outside my window I will keep my door unblocked to hopefully draw the cooler air in from the living room.

  89. Luis Rodriguez says:

    I switched from two window units in the house to central air and my electric bill cut in half and my house is always a nice 72 🙂

  90. mick jones says:

    Idk I have one ok to me kinda expensive to run but i got it from the trash so

  91. JETJOOBOY says:

    We live in the UK…. this is the best we get short of moving a sleeping bag into McDonalds toilet.

  92. JETJOOBOY says:

    CPU cooling fan attached to a 6v volt battery stitched into a fellas boxers!
    Patent Pending

  93. CTC says:

    Good information thanks well done

  94. NoOneOfConsequence says:

    How did those units handle condensation? Moisture in the house collecting on the cooling fins?

  95. marko keruyuk says:

    Thanks. You save my money

  96. t 77 says:

    Please remove the sticker from your white portable air conditioner 😅 You'll be delighted to see how much more beautiful an object it will be without it 😊

  97. Ariss says:

    Oh my god, I spent the night in a hotel where the condenser would periodically turn on and off, I could NOT sleep.

  98. Jan Dorr says:

    Why the heck don't they make narrower AC units to fit vertical sliding windows so we don't have to buy these inefficient portable AC units?? If there's such a big market for portable AC units, then the market is there for thru the window units built vertically instead of horizontally!!

  99. SC EM says:

    Eat less soy = less estrogen initiated dude ‘hot flashes’ = less need for more AC = less dude makeup runs = less dude breast support = skinny Bz will be less insecure (“His boobs are bigger than mine!” “You mean you actually have boobs?” 😭) = less snowflake meltdowns. (Iz a ripple effect)

    Tranz lation? Place the game controller on the floor, force out waz left of dem nutz, and stROLL yo pasty, pansy, incel az outside for some much needed Sunny D. 🌞 AC makes good sofa tater cheeto sissies. (This reply was not in any way sponsored, nor endorsed by Cheetos Breast Puffs’.)

  100. Ueno54 says:

    I have central air, but keep a desk fan in my bedroom because I love the noise when sleeping.

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