Top-of-the-Line Heating and Cooling Services For Homes and Businesses in Creve Coeur, MO

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A MERV rating is an industry-standard that rates the effectiveness of an air filter in trapping airborne particles. The higher the MERV rating, the more effective the filter is at trapping airborne particles.


It’s important to note that a MERV rating does not measure how well an air filter blocks gases or vapors. For that, you would need to look for a filter with an ozone protection rating (OP).

The best way to keep your HVAC system working in top condition is to have it serviced and cleaned regularly. A professional HVAC technician can inspect all the parts of the system and clean them as needed, which will help keep them running smoothly and efficiently. You should also change your air filters regularly, as dirty filters can cause the system to work harder and lead to decreased performance and increased energy costs.

Answer: While the specific timeframe between filter changes will vary based on the type of filter you have and the environment in which your home resides, most indoor air filters should be changed at least once every three months. Depending on the type of air filter you have for your furnace or air conditioner, not changing it enough can result in a number of problems. 


Three-month-old filters are much less effective than brand-new ones at trapping smaller particles—including many that are harmful to human health like pollen, dust mites, mold spores, and pet dander. Allergic reactions, respiratory infections, and other health problems can stem from these airborne contaminants inside your home.