Attic Furnace Filter

The most common airborne contaminates that these filters are tested against tend to include pollen dust mites mold spores dust pet dander.

Attic furnace filter.

Keep the area around your attic furnace clean. Excessive dust and debris in the furnace area will be pulled into the. With finer filtration fewer airborne contaminates dust particles are allowed to pass through the filter. With forced air systems air gets sucked in through the return vents from all around your house goes through the air filter and then through the hvac system where the air is either heated or cooled depending on what you have your thermostat set to.

Astro guard attic replacement filters air filters inc. The filter is probably at the air intake not in the furnace blower unit up in the attic. Fire hazards can result if there are excess items pressed against the furnace. You say you changed the two in the living areas suggesting that you have a dual zone system 2 floors.

However both your furnace and a c share a single filter. Merv means minimum efficiency reporting value merv and is an industry standard that measures the overall effectiveness of air filters.