The Tier1 16x20x4 air filter carries a MERV 13 rating, making it highly effective at trapping airborne particles as small as 0.3 to 1.0 microns. It captures dust, pollen, pet dander, mold spores, smoke particles, bacteria, and virus carriers, delivering cleaner indoor air quality for homes with allergy sufferers or HVAC systems that demand high-performance filtration.

The actual dimensions of this Tier1 filter are 15.5" x 19.5" x 3.75", which is the industry-standard undersized measurement for a nominal 16x20x4 slot. It fits HVAC systems, furnaces, and air handlers designed for 16x20x4 media filters, including many Honeywell, Lennox, Carrier, Trane, and Bryant whole-house units. Always verify your cabinet's slot opening before ordering the 6-pack.

Tier1 recommends replacing this 4-inch deep pleated filter every 6 to 12 months under normal residential conditions. The extended pleat surface area and deeper media bed allow this filter to last significantly longer than 1-inch filters. The 6-pack provides up to 3 to 6 years of filtration coverage, depending on household conditions like pets, smoking, or local air quality.

This Tier1 filter is built with electrostatically charged synthetic pleated media supported by a beverage-board frame and wire backing for structural stability. The deep V-pleat design maximizes surface area, lowers airflow resistance, and extends dust-holding capacity compared to standard flat-panel filters—allowing your HVAC blower to operate efficiently without strain.

Yes, the Tier1 16x20x4 MERV 13 filter is engineered with a low initial pressure drop, making it compatible with high-efficiency furnaces, heat pumps, and variable-speed air handlers. Its deep pleated design ensures strong particulate capture without restricting airflow, protecting your blower motor and coil while maintaining optimal system performance year-round.