Average Reviews:
(More customer reviews)This unit was able to effectively change over air in my apartment and kept me from having my typical astma problems associated with closing windows in the fall / winter. I typically will start wheezing and having breathing problems with indoor allergens, but with this unit in the window I didn't have any problems this year. The unit isn't crazy efficient with heating up the incoming air, I would guess it at 70% efficient... but it really didn't cause a spike in my heating bill that I could notice in the Boston area. I actually save on money because I can now only heat my bedroom at night and shut the door when I would typically need to keep the door open in the winter so I could get some air into the room.
This unit doesn't keep the humidity in so be sure to run a humidifier to keep the air comfortable. I would also suggest measuring twice before cutting the wall edges since they are hard plastic and can't be made longer after mounting the unit in a window. It's not like a window fan where you have a retractable wall that slides in and out to make a tight seal around the window. It's two pieces of hard plastic around some foam to insulate that you physically snap down or cut to fit into the window. That being said it does a good job at insulating if you mount it correctly. I'm very happy to the point where I now own three of these so I can have fresh air in my entire place.
For the price of a centrally mounted HRV (heat recovery ventilator)and the work involved with venting it out... you are by far better off with these small window mounted units. Not only can I bring this to a new apartment when I move, but I did my homework and you can't find a centrally mounted HRV for under 600 bucks with shipping and even then it's a cheap unit. After buying that you would have to mount vents that drive the cost up further along with the required building permits...
In New England the houses tend to be very old and the one I live in was built in 1890.. I stand by getting fresh air as the best way to combat astma and I can say that this unit did the job I asked of it. It can only handle a single room, but the most importaint room is my bedroom and it handled that well. The airflow coming out is not strong, but enough to recycle air.
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