Shop Air Filtration #2: Energy Recovery Ventilators (ERV) or Air Exchanger
This is a basic explanation of what an ERV or an air exchanger is and how it might be used in a woodworking environment. What happens is it takes a portion of the inside air and exhausts it outside. At the same time it takes the outside air and brings it in. But, while doing that it takes the energy (heat or A/C) from the inside air and either warms or cools the incoming outside air, but, without mixing the two. So you are not bringing back in the bad inside air but transferring it’s energy. That’s what makes it so efficient. Most of these units have some filtration as well. Somewhere in the 95% @ 5 microns range. The company I used to use was www.stirling-tech.com. You don&#...
