What Furnace | Filter To Buy

: The cheapest option, designed mainly to protect your furnace from large debris. They do very little for indoor air quality. LJ Rolls considers these "basic protection" only.

: Made of polyester or cotton folds. These have more surface area, allowing them to trap more particles without instantly clogging. what furnace filter to buy

: The "nominal" size is a rounded number for marketing; the "actual" size is slightly smaller to ensure a snug fit. 2. Understand MERV Ratings : The cheapest option, designed mainly to protect

: MERV 13 is excellent for asthma but should be checked for compatibility with your HVAC system’s airflow requirements. Expert Maintenance Tip : The cheapest option

: Uses static electricity to attract dust like a magnet. These come in disposable or washable versions.