AC Infinity AIRTITAN S7, Ventilation Fan 300mm with Speed Controller, IP-55 Rated for Crawl Space, Basement, Garage, Attic, Shed, Hydroponics, Grow Tents, 12-Inch

This was easier to install than I thought. I went into the crawlspace, screwed it in behind one of my crawlspace vents, and plugged it in. The default speed is 10 so you don't need to connect and use the controller unless you want to reduce the speed. It is super quiet, I can't hear it from the house unless I open up the crawlspace hatch. I had to cut the faceplate a bit with a metal saw so that it fit in the space where my vent was, but that was pretty easy. Within about a day, my radon levels dropped by ~50% and never came back up. Airflow really helps dilute the gases under the house. Saved me thousands $ and tons of stress. 5 stars.

This fan means business. IP-55 rated, so it laughs at dust and moisture while quietly turning our crawl space from mystery swamp to actually breathable. Speed controller lets you go from gentle breeze to small hurricane. Sturdy, powerful, no complaints.

Quiet and power efficient

These AC Infinity products are great. I am using 3 to ventilate my crawlspace and they have been flawlessly in service for 18 months now. We purchased this unit to control the temperature and humidity in a chick brooder box. It performed perfectly. Often it feels like connecting similar devices to the app and WiFi is a hit or miss operation. Not with these AC Infinity products. They just connect and work. There are tons of options for temperature and humidity triggered events as well as scheduled events.

Installed it to remove carbon monoxide from my garage since I park my cars inside. A must have if you have classic cars that do not have catalytic converters, as the exhaust gases can be fatal and cause cancer overtime.