Suncourt Improved Equalizer HC600 EZ8 Smart Electric Bedroom Air Conditioner Vent Booster, White

I've tried every other booster, and this is the winner, it moves more air, so it can be set at a lower speed (so you don't hear it running) and sounds more like a fan than a swarm of gnats on your vent. There is a number you call to get wall mount feet for it too, if you need to do that. Old houses with the 2" x 10" vent? This covers them too!! I have 3 of these now, and they move so much more air than the other ones that look like a computer fan stuck under a grate. Highly recommended. Sometimes getting what you pay for and paying for what you need overlap, and this vent fan is one place that paying the extra few dollars for much greater performance is worth it. I experimented for you, don't waste the time and money (and effort making adapters for a non-fitting vent fan) just buy these and be done with it

My bedrooms are always much warmer than the downstairs and when I have guests staying with me and it is hot out they do not benefit from the air conditioning. The Equalizer HC600 EZ8 has made a difference. Easy to use and helps cool off the upstairs rooms

It doesn't seem to be very easy to set up when it shuts off. I thought it came on every time the fan would start running on the furnace? I haven't seen this thing shut off yet.