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Old 04-22-2010, 08:33 AM   #1
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Filter always clean and dirt around baseboards....


Hello,
Two years ago my wife and I purchased a Ranch style M/I home that was built in 2006. It has gas heat and central air. The furnace and water heater are in a room in the garage. The return air is mounted above the hallway leading into the kitchen. Looks like it has a 10-12" insulated line running back to the furnace. The house is on a slab. All the HVAC lines run through the attic.

Long story short....

I've NEVER had to replace a furnace filter. We have two dogs and sweep hair up weekly, so I know we have dirt and dust in our home. As of late though, in a couple rooms mainly the bathroom and laundry room (rooms with moisture) the top of the woodwork is becoming dirty and the dirt won't simply wipe off. I think I am going to pull the baseboard off and clean it by scraping with a razor knife, but I think the problem lies with the return air system.

What should I be looking for? Or is there a professional who deals with this type of thing?

Thanks!

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Old 04-22-2010, 09:44 AM   #2
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Filter always clean and dirt around baseboards....


Are you sure you are getting return air to the furnace? Is the cold air return a flexible round duct? My guess is that the duct is disconnected somewhere, probably in the attic.

Do you only have one R/A grill?

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Old 04-22-2010, 10:08 AM   #3
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Filter always clean and dirt around baseboards....


Another thing to check is the seal around the access door to your furnace. Also make sure the only air entering the blower compartment is air coming from the R/A duct.

The reason I mention this is because I've serviced units that had been moved from other locations and originally were set up to have a bottom return but after they were moved they used side return, but didn't seal the bottom of the unit.

When you get this resolved you may want to take a look at your evaporator coil to see how dirty it is before cooling season gets here.
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Old 04-22-2010, 10:16 AM   #4
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Filter always clean and dirt around baseboards....


Thanks for the reply. There is one return air grille, and it's in the middle of the living room which is the biggest room of the house. It has a vaulted ceiling.

The furnace looks like it pulls the air from the bottom. It is sitting up on a platform and the filter slides in on the bottom of the furnace. I am assuming they made a channel in the wall and have the air pulling from the ceiling down thru the stud cavity and then just a hole cut in the drywall next to the furnace.

The duct I can see running thru the attic (i have storage up there, so easy access) It looks to be a straight run, but then it turns down into the 13" of blown in insulation so I may have to pull some of that back and investigate.

Thanks!
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