Question: How Do I Know If My Furnace Filter Is Dirty?

Can you get sick from a dirty furnace filter?

According to the American College of Allergy, Asthma and Immunology (ACAAI), dirty air filters may be to blame.

Studies show that indoor air pollution caused by a dirty air filter can trigger allergic reactions and sinus congestion in those with allergies to animals, pollen and mold..

How dirty should an air filter look?

Dirty Air Filter Performing a visual inspection is an easy way to know if your air filter needs to be changed. A brand new air filter is white or off-white in color, while a dirty air filter will appear darker with the dirt and debris visible.

How often should I clean my furnace filter?

A good rule of thumb is to change 1-2 inch filters every three months, 4 inch filters every six months and 5 inch filters every 12 months. Signs your air filter needs changed: The filter is visibly dirty. Certainly if you can’t see the material of the filter itself, it should be replaced.

What problems can a dirty furnace filter cause?

A clogged furnace air filter will negatively affect the airflow throughout your house and HVAC system. The lack of fresh air in your furnace will cause the heat exchanger to become too warm and deactivate. Dirty filters indirectly cause short cycling issues and will make it hard to keep your home warm.

How do I know if my HVAC filter is dirty?

One clever way to determine if the air filter is dirty is to do the “white sheet test.” This involves hanging a clean white sheet approximately 5 inches away from one of the vents for at least one hour. If the sheet turns gray, you’ve got a filthy air filter. The grayer the sheet, the dirtier the filter.

How do I know if my furnace has a filter?

Find the grill opening that draws air into it; this is your return duct. The furnace filter will be somewhere nearby this opening, and between it and the air handler.

Why is my furnace filter getting dirty so fast?

When your A/C is on the thermostat fan will constantly be running causing air too run over the air filter continuously and causing it to get dirty more quickly. … You may have a leak in your air ducts – Leaky air ducts can also cause your filter to clog up and especially if it is near your AC unit.

Can you vacuum a furnace filter?

There are several ways to clean these filters, and here are a couple of them: Follow the vacuuming by spraying the filter, preferably outdoors if possible or over a sink or in a bathtub. Spray from the furnace’s side, the side at the tip of the arrow, so as not to drive dirt into the filter, but push it out.

How can I tell if my furnace filter needs changing?

How Can I Tell That My Furnace Filter Needs to Be Changed?Filter is a different color. … Energy bills are higher than usual. … Low air flow. … Rise in physical issues. … Headaches. … Allergies. … Carbon monoxide poisoning. … Forces HVAC systems to work harder.More items…•