Cheap fiberglass filters are designed to prevent dust, dirt, and hair from accumulating in the system. While they do little to filter out allergens and other irritants, using them keeps your HVAC system clean and efficient. Disposable pleated air filters are made of polyester or cotton paper. From the cheapest of the cheapest to the best and the most expensive, all filters must be maintained. Neglecting a dirty filter can cause a build-up that will strain the system, potentially damaging the engine and reducing the life of your HVAC system.
Some of these “good” filters can also limit airflow to the unit, causing the evaporator coil to freeze in some systems or making older air handlers struggle. A decent amount of contaminants will still return to your home through the system, so you should refer to the heating or air conditioning unit manual for the recommended MERV rating. HVAC technicians often recommend fiberglass air filters because many homeowners don't remember to change them. While they are cheaper, they can put strain on some HVAC equipment, making it less efficient at heating and cooling and even shortening its lifespan by restricting airflow and forcing it to run longer. Oven filters not only prevent clogging up with dust and dirt, but they also clean the air in your home.Washable air filters will save you money in the long run since you don't buy replacements, but they won't save effort.
It's important to use the right filters and change them regularly to avoid dust, pollen, mold spores building up in the system and ducts. This could increase energy bills and affect your heating or air conditioning unit.