HVAC Resources

White pleated furnace filter capturing airborne mold spores against a maroon background, illustrating MERV 8, MERV 11, and MERV 13 filtration options.

What Furnace Filter Is Best for Mold Spores?

Concerned about mold spores circulating through your home? Learn how MERV 8, MERV 11, and MERV 13 furnace filters compare, what they can capture, and how to choose the right...

What Furnace Filter Is Best for Mold Spores?

Concerned about mold spores circulating through your home? Learn how MERV 8, MERV 11, and MERV 13 furnace filters compare, what they can capture, and how to choose the right...

What Furnace Filter Is Best for Smoke?

What Furnace Filter Is Best for Smoke?

Find out which furnace filter is best for smoke, what MERV rating to choose, and how to improve filtration without restricting your HVAC system’s airflow.

What Furnace Filter Is Best for Smoke?

Find out which furnace filter is best for smoke, what MERV rating to choose, and how to improve filtration without restricting your HVAC system’s airflow.

Furnace filter capturing airborne dust and debris to help reduce dust in the home.

Does a Furnace Filter Help With Dust?

Yes, furnace filters can help reduce airborne dust, but the right filter makes a difference. Learn how MERV rating, filter fit, thickness and replacement frequency affect dust in your home.

Does a Furnace Filter Help With Dust?

Yes, furnace filters can help reduce airborne dust, but the right filter makes a difference. Learn how MERV rating, filter fit, thickness and replacement frequency affect dust in your home.

Two 1-inch furnace filters stacked beside a 4-inch furnace filter

Can You Put Two Furnace Filters Together?

Can you stack two furnace filters for better filtration or to make up the right thickness? Learn why stacking filters can restrict airflow and what you should use instead.

Can You Put Two Furnace Filters Together?

Can you stack two furnace filters for better filtration or to make up the right thickness? Learn why stacking filters can restrict airflow and what you should use instead.

Homeowner installing a furnace filter with the airflow arrow pointing toward the HVAC system.

What Does the Arrow on a Furnace Filter Mean?

Not sure which way your furnace filter should face? The arrow on the filter shows the direction of airflow. Learn where it should point, how to identify airflow direction, and...

What Does the Arrow on a Furnace Filter Mean?

Not sure which way your furnace filter should face? The arrow on the filter shows the direction of airflow. Learn where it should point, how to identify airflow direction, and...

Homeowner sliding a furnace filter into an HVAC system to check for a proper snug fit

Should a Furnace Filter Fit Tight or Loose?

A furnace filter should fit snugly but it shouldn’t need to be forced into place. Learn how much wiggle room is normal, when gaps can cause problems, and how to...

Should a Furnace Filter Fit Tight or Loose?

A furnace filter should fit snugly but it shouldn’t need to be forced into place. Learn how much wiggle room is normal, when gaps can cause problems, and how to...