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Air Duct Cleaning In Nw Dc - Getting Rid Of Mold In The Attic
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Air Duct Cleaning In Nw Dc  -  Getting Rid Of Mold In The Attic

This home was like many other homes in Washington DC. It was right by Catholic University off of Lowell St. The customer had ordered air duct cleaning before they moved in. The vacant home made cleaning go a lot smoother and access to the system was excellent. For some reason people love to clutter stuff around their heat pumps air handlers and furnaces. This home had no clutter, but it had some issues. This home was an Bryant air handler in the attic. For some reason I've seen a lot of mold on these units. Especially when they house them in unconditioned areas.

Unconditioned areas make air conditioning units sweat a lot of moisture. That excess moisture makes an ideal condition for mold growth. If you couple that moisture with a dark environment you can bet you'll get mold. As I removed the cover over the blower motor you could see mold on all the paper stickers, evaporator coil and wiring. I don't know why but mold likes to eat up the white insulation on wiring first. It's not because it's more noticeable on white. It's visibly much thicker on white wiring. Regardless the mold needed to be removed.

I explained to the homeowner that I could get rid of the mold. However the mold would just come back. You need to change the condition that caused the mold in the first place. In this home the attic needed more ventilation and an ultra violet light needed to be installed. The UV light is installed inside the air duct. The UV rays break down any DNA. So things like: mold, viruses, bacteria and pollen can't survive in the air ducts. UV light is an excellent air scrub, that's why hospitals use them. You would preferably install the UV light next to the evaporator coil, but this system was too old.

You can't install UV lights next to evaporator coil pans that aren't UV rated. System that are over 10 years old, don't have UV rated pans. The UV would erode the pan and the pan would leak a lot of water. So I explained that I would install it on the other side of the filter in the intake. This way it would break down anything caught on the filter and wouldn't harm the evaporator coil pan.

The system needed to be thoroughly cleaned to remove all the mold, then treated with a sanitizer. The sanitizer would be active for four to six months. Once the system was cleaned and sanitized I installed the UV light. Now as long as the homeowner changes that UV bulb annually they won't have any more mold.


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