Our Picks for Best Furnace Filters for Allergies

By | January 5, 2021

Some years are worse than others for allergies with this being a bad year for allergies at least for me. Locally where I live the dust and pollen in the air seem to be worse than usual making me sneeze constantly and a nose that won’t stop running.

Besides allergy medication there is not much I can do about it at work, but while at home there are things that can be done to help those like me that are sensitive to allergies.
One of the main things is to have a good air filter on your furnace or HVAC system.

All furnaces have a filter that is meant to keep the system clean from debris that can build up and block airflow.

Having good airflow in an HVAC system is important for it to regulate the temperature. If the airflow is blocked the temperature inside a furnace will rise until a High Limit Switch shuts it off.

Most everyone knows that the filter needs to be replaced every 1-3 months depending on how much dust and other debris is in the air.

The right furnace filter can improve the air quality of a home and reduce allergies.

Cheap low-cost filters are commonly used and work well enough to keep debris from clogging up an HVAC system but they do little in cleaning the air in a home.

Air filters are rated with a MERV or MPR rating that measures the particle size that can pass through.
The smaller the particle size that can pass through the better in keeping the air clean. There is also electrostatic filters that build up an electrostatic charge which dust clings.

Allergy surfers should get a filter with a Merv rating of at least 9-12.
Merv rating can go higher for those who need cleaner air. A 13-16 Merv filter would be better for those who have very bad allergens.

Here is our picks for the best furnace filters for those who have allergies.

As always be sure to read the reviews on Amazon or elsewhere to be sure one is a good fit for your home.

*This post contains affiliate links.

Our Picks for Best Furnace Filters for Allergies

  1. True Blue Allergen Protection
  2. True Blue Allergen Protection 16x25x1 Air Filter, MERV 11, 4-Pack

    True Blue makes filters for those who are prone to allergies.

    They have a MERV rating of 11 which is a very good rating that will pull out small particles from the air as it flows past the filter.

    This includes dust, smoke, or even mold particles that get caught into the filter as the air cycles through a home.

    They have different sizes to fit most any furnace or return air filter along with multi-packs.

  3. Filtrete
  4. Filtrete 20x25x4, AC Furnace Air Filter, MPR 1550 DP, Healthy Living Ultra Allergen Deep Pleat, 4-Pack

    Filtrete makes good filters that can improve a homes air quality.

    It has a good MPR rating of 1500 which is equivalent to a MERV rating of 12.
    This gives it 3-10 micron sized holes to grab particles in the air, or will catch 90 percent of dust mite debris, pollen, and mold spores flowing through it.

    If you have moderate allergies then Filtrete is a good option.

  5. AllergyZone
  6. AllergyZone Allergen-Trapping Central Heating and Airconditioning Filters 4-pack (twelve-month supply)

    AllergyZone makes filters specifically for those with allergies.

    They can remove up to 95% of airborne allergens which in turn cleans up the air.

  7. Nordic Pure
  8. Nordic Pure 20x25x4/20x25x5 (19 7/8 x 24 7/8 x 4 3/8) Honeywell FC100A1037 Replacement Pleated AC Furnace Air Filters MERV 12, Box of 2

    Nordic Pure makes many good filters with this electrostatic version.

    Electrostatic units build up a static electric charge as air flows through them. This helps in capturing and holding particles that other filters let through.

    Besides electrostatic disposable, there is also washable permanent electrostatic. Washable cost more initially but is cheaper in the long run since they can be used over and over again.

How To Buy a Replacement Furnace Filter
Replacements filters are measured in width and length to fit into place.

Filters will have measurements on it such as 20-X-25, which means 20 inches wide, and 25 inches in length.

A tape measure can also be used to measure width and length for a replacement.
Having a quality furnace filter will greatly improve the air inside a home.

How often a filter is replaced depends on the environment. For example, those who live in a desert with a lot of dust will need to change it much more often than less debris in the air.

Units that have good Merv ratings also have smaller particle sizes that capture more which in turn often need replacement much sooner than less effective units.

While they are usually changed every 2-3 months each home is different and may need changing more often for the best results.

Disposable units while cheaper initially can cost more after long term use since they need to be thrown away once dirty.

Washable units are more expensive to buy but can be cheaper after long term use since they can be used over-and-over again.



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