How to Choose Home Air Filters

Air filters are rated on their ability to handle particles of varying micron sizes. A micron is the measurement of a particle's size. The MERV (Minimum Efficiency Reporting Value) rating is a system designed to detail and categorize the efficiency of air filters, and the particle sizes they are most efficient at filtering. And while your home HVAC (Heating, Ventilating, Air Conditioning) system may, to an extent, dictate what MERV-rated filters will work in your home, the decision is up to you.

Instructions

1. Look at the MERV rating. It should be compatible with your HVAC unit. Consult your unit's manual for information on the recommended MERV rating. If you no longer have the manual for the HVAC system, check the furnace unit for printed recommendations or take down the model number and look up the manual online.

2. Look for an energy-efficient air filter. The more efficient an air filter is at capturing particles in the air, the lower the filter's air flow resistance. Increased air flow resistance forces the HVAC unit to work harder.

3. Choose a filter. Base your decision on features such as non-absorbency and electrostatic conductivity. Non-absorbency prevents moisture buildup in the air filter, which will minimize the chance of mold buildup. The electrostatic conductivity can attract pollutants toward the fibers of the air filter.

4. Look for a reusable air filter. Reusable filters may be more expensive than disposable filters. But after a couple of reuses, you actually save money

References

• Kimberly-Clark Worldwide: A Must-Know Guide to Selecting the Right HVAC Air Filter For High-Rise Condominiums
• How is the Evironmental Protection Agency: Performance of an Air Cleaner Measured?