I have a home office in an attic that's sun-baked in the summer and drafty in the winter, and this powerful heater/air conditioner can quickly bring the space to a comfortable temperature year-round.

Unfortunately, the unit is quite loud. The AC fan (which runs continuously even when the compressor is off) is so loud I have to turn it off when making a phone call. And the heater (which turns off completely when not in a heating cycle) makes such a jarring noise when it comes on that I jump out of my seat every time. The AC noise wouldn't be a problem if it were further from my desk, but if I had this in a bedroom there's no way I'd be able to sleep with that heater noise.

Also, despite the unit being marketed as not needing a water tank or drain for air conditioning, it does occasionally leak water onto the floor. Placing a cookie sheet or an improvised aluminum foil pan underneath is an easy solution, but it took me a while to notice what was happening... Read more

I usually don't write reviews on products, but this one deserved a good one. We just purchased this for my son's apartment which only has evaporative cooling (worthless in the desert during the monsoon). His place is a loft in an old brick warehouse - poorly insulted, high ceilings. It was easy to install by venting through an old casement window (we used the attachments plus some foamboard and duct tape to seal an irregular opening). We all expected it to be loud but were very pleasantly surprised by how quietly it ran at full fan speed with the compressor on. Within 20 minutes the upstairs of the loft - an area over 600 sq. ft. - was much cooler in the area near the unit and noticebly cooler farther away. I expect it to do very well after running overnight. It's going to be up to 107 degrees and humid this week (humid for us is over 40%) so we'll see how it can deal with the worst that Tucson has to offer. Will update the review later this week (if I remember) but expect... Read more

This has been a very hot summer and I was going to be scared to look at the next electric bill........man I was very surprised it only went up $30.00 and this cooler was ran from 7am to 9pm every day! Rated up to 500 sf but it hold it own in keeping a larger area fairly cool, upper 70's but a lot better then the 110+ out side and the 90+ was the coolest that the swamp cooler could do during the day in my elderly fathers home. Very easy to operate as my father does not do electronics or computers very well. There will be a extra bonus now that this has a heater on it for the winter will be able to get rid of the small costly space heaters that he likes to use. This is a great buy for your money.