Hello everyone!

Portable air conditioners work by taking the air from your room, cooling it, and blowing the hot air out through an exhaust hose attached to your window.

But blowing hot air to the outside creates negative pressure inside your room which, in turn, pulls in more hot air from the outside (the amount of air blown out is equal to the amount of air pulled in). It is kind of self defeating.

The portable air conditioner is able to cool your room as long as the air it exhausts is hotter than the hot air pulled in, then there is an overall cooling effect. But as the temperature outside increas, a small A/C unit may not have enough BTU to to cool the air enough to compensate the hot air being sucked in.

I made the mistake of using a traditional web based cooling calculator to estimate the amount of BTU's needed for a portable A/C. If I had read the web page more carefully I would have noticed that these BTU calculators are for... Read more

We just had a record-breaking heat wave. I live in a poorly-insulated house that becomes hot in 85-degree weather, and we hit 100. (Just north of Seattle, WA.) This A/C did a great job of cooling two small rooms (cool one room, move the A/C to another room, cool that one, then back again, for about a week).

Some observations:
1. You MUST vent a portable A/C out a window or into a drop-ceiling, or you just pump the hot air back into the room.
2. Portables seem to work better when elevated (hot air rises, so this helps keep the "convection effect" going by getting closer to the hot air).
3. It's a little noisy. Adding rubber gasket material to the vents reduces the noise a lot by damping the vibrations.
4. An A/C's BTU rating must match the room size, or the unit simply won't work right. This is true of all A/Cs, and seems to be somewhat critical for portables.
5. It acts as a dehumidifier, which means that you have to drain the water tank regularly... Read more

So, I live in a studio. Not very big at all. You would think this air conditioner would be able to handle keeping it cool. Well, not so much.

Regardless of how low I set it, or how long I kept it running, it kept my studio at 78 degrees. It was actually a better deal to shut it off, open the windows/door and let the air circulate. It actually got cooler in there once I did that.

Moreover, the hose you connect to the window vent is an eye sore, and isn't flexible enough to let your place the unit somewhere convenient. So you end up having to leave the A/C unit in the middle of the room instead of neatly in a corner or against the wall because the vent hose doesn't allow otherwise.

This is pretty much the worse purchase I have made in a LONG time. Worse of all, it doesn't even make sense for me to return it. The seller charges as 12% "re-stocking fee". Moreover, I would need to carry the huge 70+lbs box up and down stairs to get it back to my work so... Read more