HeavyDuty filters are constructed with heavy duty, premium grade fiberglass media, and have a skin on the air-entering and air-leaving sides. Available in a wide range of sizes and two thickness configurations, these filters are used in all types of HVAC systems to protect the coils from dirt and as prefilters to extend the life of higher efficiency filters.

HeavyDuty XM filters are constructed with heavy duty, premium grade fiberglass media, and have a skin on the air-entering and air-leaving sides. Available in a wide range of sizes and two thickness configurations, these filters are used in all types of HVAC systems to protect the coils from dirt and as prefilters to extend the life of higher efficiency filters.