Mike, our residential crew leader, took these photos at a residential jobsite last week.  Check out this “before” supply plenum:

Residential Supply Plenum- “Before”

Yuck!  All the white crusty stuff surrounding the damper is most likely composed of a combination of fungal growth, dust, and other harmful microbials.  If this homeowner has pets, there’s probably some pet dander in there too.  Every time the homeowner turned on the a/c, he was breathing all that harmful stuff!

Mike cleaned the dirt and debris out of the supply plenum, then finished with an anti-fungal, anti-microbial coating to prevent any future growth.  Here’s the “after” picture:

Residential Supply Plenum- “After”

Much better!  This homeowner will be breathing easier for years to come. 

For more information on the cycle of a mold spore, check out our article on the life cycle of mold.

For more information on our five point cleaning process, check out our article on our hvac system cleaning process.