Average Reviews:
(More customer reviews)I'm using this fan as a duct booster. I added two vents to a sunroom at the far end of our house but was getting very little airflow from our furnace due to the distances involved (about 50 feet thru a 6" duct, about half of that being insulated flex duct). I wasn't sure how much boost power I needed so bought a somewhat overpowered fan and also a speed control to slow it down if necessary. At full power, this fan blows a LOT of air, so much so that it robs a noticeable portion of the air from the other vents in the house, so I do use the speed control to tame it down. It's a bit noisier than I had hoped. There's absolutely no noise coming out of the vents that it actually feeds through the flex duct, but the fan noise does travel back to the main duct and out the other vents in the house. I added a duct muffler, which helped somewhat, but the noise level is still noticeably higher than that produced by the furnace blower alone. The fan seems to be well built. The installation instructions are good. The terminal block made it very easy to connect to AC power. I do wish the parts of the fan that mates with the ducts were a bit wider - there's not a lot of material there to work with. Regarding the speed controller, I actually bought two speed controllers along with a pressure switch. When the furnace blower is off, the pressure switch powers the fan with a controller set to a very low speed, which constantly gives the sunroom a bit of needed air circulation. When the furnace blower kicks on, the pressure switch switches to the other controller which is set at a higher speed and provides plenty of warm/cool air to the room.
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