When it comes to furnace air filters, the higher the MERV rating, the more effective it is. Most spun filters have a MERV rating of 4, while standard pleated filters have a MERV 6.Electrostatic pleated versions start at MERV 8, and the higher-quality versions arrive at MERV 12. How often you need to replace a furnace filter depends on the type you purchased and the air quality in your home. If you or someone in your household has allergies or asthma, you may need your air filter to exceed the minimum protection requirements of your air conditioning system. You may need to replace the filter more often if you have a few furry pets, or if you live in an area with a lot of air pollution, such as due to forest fires. The lower the MERV number, the less effective the filter is at capturing particles (measured in microns) from the air.
When installing a new filter, be sure to face it in the right direction. Look for arrows on the filter frame that indicate the direction of air flow. The MERV standard is primarily used to measure the performance of filters designed for forced air conditioning systems. Air filters generally come in a variety of standard sizes, and some can be adapted to fit different-sized filter boxes or air return openings. Any pleated HVAC filter can improve your home's indoor air quality by trapping dust, pollen, and other small particles, such as a quieter, more passive vacuum.
In a home with normal air quality, fiberglass filters should not be replaced more than once a month and pleated filters every 30 to 90 days. We also control the extent to which each filter restricts airflow using a differential pressure transducer installed throughout the air filter. Your HVAC professional would install a small cabinet next to the boiler or air controller (on the air intake side) to hold the thicker filter. Simply insert the filter into the slot with the arrow pointing towards the airflow (usually the fan) and make sure it is properly adjusted and does not leave gaps in the filter grille. For example, an oven filter measuring 18 x 16 x 1 is 18 inches long, 16 inches wide and 1 inch deep.
Inevitably, some of the hair, dust, and other debris in your home are absorbed by that circuit as air circulates through your home. Some filter brands and retailers use alternative scales, such as the Home Depot Air Filter Performance Rating System (FPR) or the MPR (on 3M Filtrete air filters). To ensure optimal performance from your furnace air filter, it's important to choose one with an appropriate MERV rating for your needs. When installing a new filter, be sure to face it in the right direction. Make sure it is properly adjusted and does not leave gaps in the filter grille. Your HVAC professional would install a small cabinet next to the boiler or air controller (on the air intake side) to hold the thicker filter. To guarantee optimal performance from your furnace air filter, it's essential to select one with an appropriate MERV rating for your needs.
Additionally, consider factors such as how often you need to replace it based on your home's environment and whether you need additional protection due to allergies or asthma.
