Air Pump Cleaner
Our cold air return ducts do not have metal in it - is cast? Is this correct? We have a heat pump.
When I pulled the filter replace, it seems to be clean. I realized that the cold air return is a space between the drywall and attic. I thought the cold air return should be duct work in it. Is this right for a heat pump or is not configured correctly?
It was in an acceptable time code using cavities uncoated return air ducts. The code has changed since then, but do not worry. Any home in our area that was built before 30 years ago was done this way. It just has not been a lot of problems with it. I can not think of any reason why it would be worth spending the money to fix it. fs
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