Tjernlund RX2 Reversible Radon Ventilation Fan - Powerful Basement & Crawl Space Radon Mitigation System | Ideal for Home Safety & Air Quality Improvement

I bought 2 of these for my duplex (purchased another 2). I sustained a lot of rain during construction and ended up with mold in my crawl space. I installed 4 of these throughout the duplex as an exhaust to create a negative air pressure in the crawl space and blow out the stale air. They are a bit on the noisy side, if you are in a noiseless, peaceful neighborhood you might not want to purchase these. The fact they are reversible is great although I do not want an intake only exhaust. They are for summer use for me. Winter time i will block them off and I am ducting a heater vent from my furnace to my crawl space (Insulated Concrete Forms) that is ultimately connected to an ERV .These fans along with a vapor barrier are a life saver. In a weeks time you will notice the stale nasty smell diminish in your crawl space. I personally dont recommend using any fan blowing outside air into the crawl space. I am more of a fan of just making negative air pressure in the crawl space but you do have the option of reversing them. They are 120v standard plug ins that need to be connected to an extension cord or you need to wire a receptacle. I wired receptacles however if you wanted to get real fancy you could wire them to a switch in your utility room. I leave them on 24x7 and will have to get down in the crawl space to plug them up for winter anyway so I didnt have a use to wire them to a switch.They are humming along spitting out the stale air as we speak.