Tjernlund X2R Remote Mount Xchanger Reversible Basement Fan - High CFM Ventilation for Crawl Spaces, Attics & Basements - Energy Efficient Air Circulation Solution

I just bought and installed it with a help of a friend who is a contractor. It took about 3-4 hours for the complete job. Make sure you locate it near an electrical outlet. After the first night when I went into my basement there was a noticeable difference. It is mid April in New England which is the rainy season. I didn't know what to set the humidistat at so I set it at 30% humidity and let it run for 4 days. I then went into the basement and again there was no musty smell. I tried raising the humidistat to see if it shutoff. It did at 60%. I reset the humidistat to 50% humidity and will let it run and see if it shuts off at some point. I read a few things about levels of humidity in a basement and it said that mold doesn't not grow at less than 60% humidity. I also read dust mites are not a problem at less than 50% humidity. I have a brand new house and was surprised by the humidity problem in my basement. My basement is about 1180 sq ft with 8 foot ceilings to the bottom of the floor joists. The floor joists are filled with insulation. According to my calculations this machine with both fans exhausting should exchange the air in my basement every hour! I believe my humidity problem is due the fact that before they could pour the basement floor it had water in it and they had to add crushed stone to pour the floor. After about 6 months in the house mold started growing on things in the basement. It seems like this little device has remedied my problem. I leave my basement door ajar so the dry air from upstairs can be drawn down to replace the damp air in the basement. I was told you either need to leave the basement door ajar, or add a floor vent that would again allow the dry air from upstairs to replace the air being expelled in the basement. It seems like common sense to have the air that is coming into the basement to replenish it away from this exhaust system. The only other option is having one fan exhausting out and one fan bringing outside air. The problem with this is that it cuts the effectiveness of your machine in half, in my opinion, only 90 cfm instead of 180 cfm being exhausted. I will review it again done the road.