Duct Cleaning

Q: I recently moved to an older ranch on a slab...not used to not having a basement where all the mechanical guts of the house are easily accessible! There is major road construction going on behind the house. I realized that the orange dust that I kept finding around the vents is residue from the road construction....(clay soil!)...so we have been keeping the windows closed and the AC on. After vacuuming the vents, I think I really need to have them cleaned professionally. Any suggestions on what I should look for in a service? Since we're on a slab, I believe all the duct work is under the floors and in the walls, right? Do they just suck out the vents or do they tap into the ductwork? There's a company that has a special advertised for $7.95 per vent....is that reasonable? Or am I ok with just vacuuming out the vents....I've heard pros and cons on a lot of the duct cleaning services

A: You want someone reputable - that means that they have a facility (do not work from home), are listed in the yellow pages of your phone book and are members of the BBB or local chamber of commerce. They will use vacuums to such out the dust, but they have a lot more vacuum than an ordinary industrial vac, they do not drill holes in the ducts.

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Cleaning Air Ducts

Q: My air conditioning unit doesn't blow as good as it used to. I cleaned the coils and it is blowing colder air but still not blowing very hard through the vents. I heard that they can come blow out the ducts and wondered if this was a good thing and is it as costly as it sounds like it would be? Does it really help? I was thinking it would help with any allergies if nothing else. But trying to keep everything going myself I don't have a lot of extra money for things that won't make much of a difference.

A: You would have to have a lot of dirt build-up in the ducts to affect air-flow and I would think this is highly unlikely. Cleaning the ducts will remove dust, and other allergenic compounds. Things that can affect air flow are usually related to the return air coming into the furnace or clogged air conditioning heat exchangers (coils).

Replaced the air filter?
Have you placed any furniture in front of return air ducts?
New Windows?
Sealed the house?
New Doors?
Removed a fireplace or blocked a chimney?

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Moving AC Ducts

Q: I have two AC ducts bent in a 90 degree angle up in my attic. The room that they run to, of course, stays a bit warm. Can I just cut the ducts with a box cutter, re run in a straighter path and duct tape them back?

A: It might change the air balance throughout your home. If you do make the change make sure you use tape made for ducts - NOT the grey stuff you buy at your local big box store - that is not made for taping ducts together.

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