Excellent. I have installed these fans in the past to remove crawlspace odors for encapsulated crawlspaces. I discovered that I had a 88 avg. level of 7 picos in my basement. I ordered this fan and connected it to our 88 pipe. Within 48 hours our 88 average level is now 1.1. Awesome. Easy to install, quiet, and it works! This company is also a five star company to work with.

I had my crawl space encapsulated a year ago, and several months later I started noticing a strong odor after a hard rain. The odor would work it way through the air vents into the living space. I called Larry after reading his blog on the web, and he suggested this fan. I installed about 65' of thin wall pipe under the plastic on the ground and vented it out of an existing vent. The smell was gone within 12 hours! I also like the fact that it comes with a 5 year warranty. Thanks!

This fan took care of the smell problem and was easy to install. Thanks

Long story, short, but... Following my DIY crawlspace encapsulation job, we started noticing an odor in the house. At first it was just a whiff, but as time went on it got stronger and stronger. Smelled like cat pee and I was wondering if the previous owners had felines in the house. I called Larry at Crawlspace Concepts and he said the culprit was likely soil gas and that I should install a 88 mitigation fan and slide a bunch of perforated pipes under my new liner. I took his recommendations, installed the system and within 24 hours the smell was completely gone. With the fan and pipes it was another $350, and I had to pay a roofer $200 to install the vent on our steep roof.