Re: Air filters for round vents
You can't put filters in supply grills. It will restrict airflow and reduce the "throw" of the supply register. The throw is what mixes the air in a room and helps keep temperatures even. Reducing airflow can damage your air conditioner and.or your furnace. IF you damage the heat exchanger on your furnace you will get CO2 and possibly carbon monoxide as well. Carbon monoxide detectors don't detect low levels that could still make you sick. Only higher levels that will kill you. Some pros recommend low level carbon monoxide detectors if you have gas appliances.
There's no reason to do this. IF you have a Merv 13 filter and have cleaned the supply ducts, filter at the grills won't do anything. To filter further, you'll need a supplemental HEPA filter.
Before you do that, I would make sure that you're controlling humidity and bringing in fresh air. "the solution to pollution is dilution"... as they say. As a ventilating dehumidifier and a HEPA filter and you'll be in great shape. You could also add a UV light, but I think those are mostly a waste and unessesary.
Some HEPA filter units can bring in fresh filters air as well as can some dehumidifiers.
The absolutely best thing you can do to remove fine dust is to vaccuum frequently with a vacuum with a HEPA filter on the exhaust. You homes HVAC system isn't a dust collector. IT won;t capture more than maybe 10% of you home's dust at most. The rest you need to remove with a vacuum, mopping or dusting.
Vacuum bedrooms almost daily if you child is very sensitive. That's where most dust is. Keep humidity under 50% in summer and over 40% in winter when it's over 30F overnight and 20-40% when colder overnight.
Have your attic inspected for mold as well as make sure you don't have any moisture in your basement.
Last edited by motoguy128; 01-04-2012 at 07:46 PM.
1925 Two-Story Stucco Beaux Arts Neoclassical