BIOWIND Quiet Register Booster Fan Fits 4" x 10" Register Holes, 10-Speed Smart Heating Cooling AC Vent Fan with Remote Control and Thermostat Control - Bronze

It's ok, doesnt have as much power as we were hoping. We will see in the summer of it does what we want it to do.

No more expensive portable room air conditioners that last less than 5 years!! These work to cool living areas: kitchen in the mornings, bedroom at night. Can't say they are 'quiet' when fan is set to high (8-10), but it's not invasive, more like airplane engine noise at cruise altitude (white noise actually puts most people to sleep, the reason so many people take a flying nap). Settings are simple to make and so far, no problem with digital panel working as expected. Important Note: these plug into electrical outlet, so carefully consider whether they can plug in near your target register vents. Elec cord is reasonably long. I've only used these for one month (summer) with central ac cooling, so can't speak to longevity, but with my bdrm door closed for an hour before bedtime, they bring temperature down abt 10 degrees (with ac running, then I turn central hvac off at bedtime, bdrm stays cool all night). Colder rooms help with getting to sleep. One more thing. These vent units measure the air temp blowing from the vent, not the room temperature. You select the vent temp -- for summer mine is set to come on when vented air is below 70; next winter over 80. Note: an issue arises when trying to set both at same time (not a flaw, issue is covered in instructions), simple to set it once per season.

I have grown to love these... if you want a little boost, you can get them down to quite quiet, if you need to pull more air it can do that too, and still quite manageable. I like how it turns on and off when the a/c or heat is on! The casing is attractive, and the display turns off when you're not using it (so no extra light in the room when trying to sleep). Good job folks. Simple, reliable and attractive.

Our master bedroom is over our garage. Even though the garage is insulated, for the past 5 winters of living in this home, The bedroom has easily been 5° colder than the rest of the house. We have a nest thermostat and we have a second thermostat sensor in the bedroom. I would say that we got and installed both of these fans by mid-month Jan and you can see how much the energy use has gone down overall since. We did have a few very cold days this past week so take that into account but the temperature has stayed consistently within a degree or the same as the rest of the house since we started using the fan vents. We tried another brand first that had more technical bells and whistles but I find this one to be quieter and easier to set. I have the fan set 5, and it remains fairly quiet. I set the cold to off and I set the heat to kick on when it tracks below 70 in the vent. We are an all-electric home on a heat pump so I suspect if you had gas heat you would set it on a higher setting but with a heat pump, it's only using the recirculated air anyway so I set it lower than recommended. For our electric bill, the goal is to try to avoid the auxiliary heat kicking on. I am happy we have been able to do that barely successfully. It used to be that every night in the middle of the night when it was at its coldest we would use a ton of power. Just trying to maintain the temperature. It's a fairly large room about 10x 20 and we have two vents that are right near the windows and the edge of the garage, which would probably be the coldest part of the house. These are what we put the fan vents in. The other two vents are tucked away in the ensuite bathroom, and the walkin closet. Even though they keep those places warm, they don't put a lot of heat out into the room. These have been a game changer for us and I haven't done comparisons with our heating bill yet, but I expect it will help based on what our sense monitor is saying. I am just so happy to be able to shut the door up here and not freeze and not worry about using a space heater and to have this room stay the same temperature as the whole house. Definitely worth it!

I thought this was going to be cheap and not really improve airflow and honestly thought I would just end up sending it back. This thing has been perfect in pulling cold air into my upstairs. My basement and first floor stay cold but it's hot on the 2nd floor even at night. This thing has dropped the temperature 7 degrees. It's even better if you use another fan to it close by as I sleep with one anyways. Keeps it Cold at night and help temperatures during the day too. The different settings are nice but I always just keep it on high. The remote is really nice. It's built well and not cheap and feels like it's going to break. It also looks very clean and better then metal vent. I like the black a lot. It's powerful but works best on high. The size is great and fits perfect for all vents in my house. Their is no coil whine or annoying whine noise. I am going to buy 3 more for all the rooms on my 2nd floor. Would definitely recommend to anyone who needs help pulling ac/heat into certain rooms in their house that air struggles to reach.