Check with your filter distributor for activated carbon (charcoal) filters. You may want to check with your neighbor to try to identify the source. Most likely it is an organic-based source, which activated carbon filters work well on. However, non-organic sources may not be filtered out and...
I am in the process of performing a fire damper inspection for a client and have come across a damper that I have never seen before. It is a blade style fire damper with no visible fusible link. Mounted on the outside of the duct, on the damper blade pivot rod, is an arm with a weight on the...