We are right now in the middle of allergy season, when even people with minor allergies and asthma can start to experience uncomfortable symptoms from the pollutants circulating through the air. At Johns Refrigeration, we take indoor air quality very seriously, and we want you to have the most pleasant conditions in your home as possible. We install a variety of filtration systems that will remove most of the allergens moving through your home’s air.
Understanding air filters requires understanding how they are rated for efficiency. MERV, which stands for “minimum efficiency reporting value,” is the measurement that was established in 1987 by ASHRAE to rate the effectiveness of air filters. The higher the MERV rating, the smaller size of pollutants a filter stops.
For example, a MERV rating of 1–4, the sort found in the air filters in window ACs, will stop particles down to 10 microns. This includes carpet fibers, dust from sanding, cockroach debris, and pollen. However, it won’t stop hair and pet dander, mold, spores, lead dust, and most emissions. For the majority of homes, a MERV rating between 5–12 is preferable. These higher ratings trap most allergens.
Be cautious of the HEPA filter
The best-known type of air filter is a HEPA filter, which has a MERV rating of 13 or greater. HEPA filters are often used in hospitals and laboratories, and they can trap bacteria, viruses, and smoke. However, HEPA filters are rarely appropriate for use in home ventilation systems because they will cut off airflow. This is the danger with aiming for a high MERV rating; you might end up creating trouble for your air conditioning and heating system, placing extra strain on them and raising your bills.
When you are considering installation of an air filtration system for your home, don’t guess about what type of filter to get: call on professionals who will see that you have a filter ideally matched to both your HVAC system and the types of allergens you most need removed.
With the help of the team at Johns Refrigeration, you can enjoy a pleasant and allergy-free season in Mesa, AZ.