Cheap The AirFlow Breeze Home Heating/Cooling System (Brown) (Fits 4"W x

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I ordered this product for our upstairs bedroom vent to help cool the room. The thermostat to control the fan speed is a great idea, but ours doesn't consistently run only when the AC kicks on. When it does run, it's not exactly quiet and kind of annoying. However, we do manage to sleep through it fine. Overall though, I gave this product only 2 stars because it doesn't force that much more cold air into the room. It would also be helpful if the vent slats were directional. Running the fan function by itself (not with the AC) produces no extra cold air, only air movement.

After purchasing one, I hoped it would work at least okay to purchase another for my upstairs office. Instead, I'm shelling out the money for a free standing AC unit. I'd advise you to do the same if you want cold air.

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This fan makes a difference in a room over the garage but it's pretty loud when it's running.

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Effective but extremely noisy. I had to pull out the cheap and noisy fans and replace them with good ones (Noctua). After the replacement (and extra $30) the booster works fine.

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In my situation, the AirFlow Breeze register booster really works. The product looks great you don't even notice it's different from a regular vent cover. My spare bedroom/craft room was always a little too stuffy and a little too cold depending on the season. Now, I can enter that room for a little quiet time and never notice the temperature difference. Thank you AirFlow you have made my problem room manageable!

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I too live in a 4 story townhouse and the 4th floor in the summer is like an oven. I got this device and some insulating curtains and now the temp is somewhat reasonable. I had a professional hvac person come out and he said it would cost over 3,000 bucks to fix it. Given this thing is 50 and it is helping take it down a notch, I give it a great review.

This thing won't fix the issue, but it helps make it smaller.