Durablow 220 CFM Air-Out Stainless Steel Crawl Space Vent Fan, Dual Fans with Dehumidistat & Thermostat, Foundation Vent, Radon Mitigation, for Crawl Space, Basement (Stainless Steel, M2D)

I'm actually using this fan ventilator for my garage, not a crawl space and so far, it's working great. It was quite easy to install and came with all the hardware needed, including four thin foam strips with sticky tape on one side that made the installation more professional and allowed for a nice, tight fit. Following the instructions, it was quite easy to connect the device to my home Wi-Fi and the app set up was quick and easy. Once the device is added to the app, you can turn it on/off and change the percentage of humidity at which you want the fan to automatically turn on. The CFM's are great for my purpose. Since we live in the desert, our garage gets quite hot when parking two cars in it (engine heat and ambient temperature). This fan has helped pull the hot air out, blowing it outside of our house, bringing fresh air into the garage as long as I have the fan turned on and it's working great. The installation took all of 10 minutes and the app set up took another five minutes. Quick and easy!

Nice. Served intended purpose. Purchased for someone else.

Appears to be well made, quiet operation, installed in vent, in garage, went to opposite end of house, can feel it pulling air in, 52 ft, from fans

We got it for radon remediation. Overall it works well and pulls out a lot more air than I thought. It is a bit loud, but if your heater furnace or A/C kicks on, those are much louder. It’s a constant hum “white noise.” I had to run electricity to the crawl space so I put an outdoor lamp timer and a GFCI circuit for it in the garage. That way I won’t have to go into my 12” high crawl space to control it (I hate going in my crawl space!!), and it’s on a timer so it’s only on from 9am to 9pm so it won’t disturb our sleep. I tried to mount it from the outside, but the guts plus ac cord didn’t fit in my opening. It’s more protected from the elements and probably cuts down on noise inside the crawl space, so it’s probably better to install it in your crawl space.

Sacramento isn't especially humid most parts of the year, but during the winter it can get into the 80-90% range. In our 1950s house with uninsulated walls and floors and heating kept around 68 F, this means indoor humidity can approach the ~75% range, enough that clothes in the closet can start to develop a musty smell and condensation begins to occur on the windows overnight. A dehumidifier is one way to deal with this, but uses a lot of electricity. Just as bothersome, poor crawlspace ventilation results in stagnant, moist air and quickly produces a musty smell which can permeate the house and makes a comfortable environment for spiders and insects. Crawlspace encapsulation is expensive and/or labor intensive, from what I can tell, pretty rare around here. Thus, we looked to this crawlspace fan to resolve some of the stagnant air issues in the crawlspace, which would also hopefully reduce some of the indoor humidity issues in the process more economically than relying purely on a dehumidifier.Install wasn't fun in our 2' crawlspace, but built character (or something). I had to make a plywood frame to get this flush with the crawlspace vent, and also cut out some of the metal sheeting. After initial installation below our master bedroom, we were getting noticeable noise coming through the (uninsulated hardwood) floor. This wasn't really noticeable from the crawlspace, because the noise of rushing air was masking it, but we were getting a tone of ~800 Hz peaks at 35 dBA or so, enough to be annoying without a fan to provide white noise. The next day I went back in, taking some advice from the reviews here to add D-style weather stripping around the perimeter of the metal sheet, and also added rubber washers to all the screws. I also added a timer outlet with a remote so I wouldn't have to crawl back in if we had a power outage or something else that threw off the timing. The weather stripping/rubber washers reduced the sound in the bedroom to 300 Hz peaks at around 30 dBA... a much less annoying tone and perceived at about half as loud, easy to mask with a fan running on low. So, I would recommend that modification if you are noise-sensitive.The fan itself moves a good amount of air and appears to be of very solid construction. I have no doubt about its durability. As to the effectiveness of the additional crawlspace ventilation in resolving our issues, time will tell. I have a humidity datalogger in both the house and the crawlspace, so over time I hope to get some good data about its effectiveness.

Bought in November 2024 less than a year and both fans have stopped working… I did run the entire time but thats what they are for

In the photo is my crawl space fan, it has been in use since mid-2018 and shows no signs of giving up anytime soon. As some other reviewers have mentioned using soft material between the mounting surface will help somewhat for the noise transmitted into the structure. For my single fan installation noise wasn't really an issue, added insulation and can't hear the fan indoors at all.Main thing is that the fan and humidistat work well and perceptibly reduced humidity in the crawl space.If this one ever stops working I will buy the same product again!

Based on specified air flow this should turn over air in a good sized room in half hour. It took almost 10 times that long. This is good for a cabinet, but had negligible affect installed in my garage vent.