[GWN7]

I have two (one up stairs, one on main floor). The brand escapes me at the moment, but they are round and have a foam pre filter and a replacement inner filter. I got them because of the dogs and the dust/hair they shed. Two Old English Sheep dogs. 90 & 125 lbs.

Do they work? Yes the pre filter needs cleaning every 6 months or so. I unplug them and then vacuum the exterior of the unit then place inside a garbage bag to move them outside where I take them apart and remove the foam filter. Clean it with my air compressor and then wash it. Then I use the air on the unit and wipe it down. The replacement filter is inspected and replaced as needed, the factory says every year but they are a bit pricey I've gone about 3 years on them.

The biggest reduction in house dust was when I removed the wall to wall carpets in the living room and upper hallway. I couldn't believe how much dirt was contained in that carpet and it went thru the under pad. Put laminate flooring down instead.

I change the furnace filters twice a year. Central air moves the same amount of air as heating does in the winter. Someone usually has them on sale in summer and they can be bought for about $2.50 or so.