Are MERV 11 filters bad for HVAC?

Are MERV 11 filters bad for HVAC?

The short answer is that it can, but it’s not really an issue except under extreme circumstances. Most modern HVAC systems have no problem working with higher MERV filters, which is why millions of homeowners depend on them.

Can I replace Merv 11 with MERV 12?

In general no. In order to use a Merv 12 to replace a Merv 11, you need to know if you system can handle the extra pressure drop caused by the higher efficiency Merv 12. My heat pump/ ventilation system cannot support the pressure drop of a Merv 12. Compressors operated above design limit will die sooner than normal.

Is MERV 11 good for allergies?

Still, these filters can be up to eight times more effective than fiberglass filters. MERV ratings of 9-11 mean at least 90% particulate resistance. If you suffer from extreme allergies, you’ll want to look for a filter with at least a MERV rating of nine. These filters capture particles as small as one micron.

What does a MERV 11 filter do?

MERV 11 air filters block at least 65% to 79% of airborne particles in the 1.0 to 3.0-micron size range. And, they’ll provide 85% or better filtration of particles in the 3.0 to 10.0-micron range. This includes things like: Pet dander.

How long does a MERV 11 filter last?

The MERV rating also determines generally how often to change your furnace filter. MERV 8 filters should be changed every 3-4 months, MERV 10 & 11 filters every 6 months and MERV 16 filters every year.

How many MERV do I need?

We do recommend that everyone uses filters that have at least an 8 MERV rating. These filters will remove the majority of pollutants from your indoor air. If you have serious medical conditions making it difficult to breathe, you might want to get a filter with MERV 9-12 rating.

What’s the difference between MERV 11 and 12?

Luckily, MERV 11-rated filters handle those particles — such as pet hair and dust mites — with ease. Likewise, MERV 12 filters catch about the same types of particles. The difference between 11 and 12, therefore, is quite negligible. We do not carry MERV 12; MERV 11 does just as good a job.

What MERV rating is best for pollen?

Ideally you want to choose a MERV rating of 17 or higher, which are most effective at blocking the particles that cause allergy symptoms.