What Furnace Filter Rating Should I Use?

When it comes to selecting the right furnace filter for your home, it can be difficult to know which one to choose. To make the best decision, it's important to understand the MERV rating system and how it affects the efficiency of your oven. The MERV rating system is used to measure the resistance of a filter. The higher the MERV rating, the more resistant the filter is.

Generally, filters with a MERV rating of 16 or lower are considered HVAC system grade filters for residential, commercial, and general hospital use. For domestic use or high-quality commercial filters, a MERV rating of 8-13 is typically recommended. This range strikes a great balance between maximum oven efficiency and home comfort. If the filter is too dirty or too resistant, it can cause airflow problems that impair efficiency and performance.

Using an air filter with a MERV rating higher than recommended by the manufacturer of your oven or air conditioner may impair its performance. If your oven's MERV rating is too high, it can force your oven to work too hard and leave it vulnerable to damage. Compared to basic fiberglass filters, medium-efficiency MERV filters such as the Nordic Pure MERV 12 can greatly reduce airborne dust, mold spores, pollen and even smoke. This can help alleviate respiratory ailments, according to an NIH review.

However, these filters usually cost significantly more than basic fiberglass filters and should be replaced every month, three months, six months, or a year depending on the filter. When selecting an oven filter, it's important to remember that a better MERV rating doesn't always mean it's the best option for your oven. In actual use, with the air in your home constantly recirculating through the ducts and passing through the filters each time, the cumulative effect of the filters increases. To ensure maximum efficiency and performance from your oven, make sure you select a furnace filter with a MERV rating that is recommended by the manufacturer. This will help you strike a great balance between maximum oven efficiency and home comfort.