

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The GLASFLOSS 16X25X4PL40 is a 4-inch pleated air filter in the Z-Line Series, rated MERV 10 per the ANSI/ASHRAE 52.2 test standard. It is designed for standard-capacity filtration in residential and light commercial HVAC systems. The filter media uses synthetic fibers that do not absorb moisture and will not support microbial growth, making it a reliable choice for maintaining indoor air quality and protecting downstream system components. HVAC technicians and service professionals install this filter as a routine maintenance item in forced-air systems requiring a 16 x 25 x 4 inch filter slot.
This filter fits HVAC applications where improved filtration performance is needed across a wide range of system types. The Z-Line Series is rated for virtually every standard application, and the 4-inch depth provides greater media surface area than standard 1-inch filters, extending service intervals and reducing airflow restriction over time. It is suitable for residential air handlers, light commercial rooftop units, and other systems with compatible filter housings.
Designed as an OEM-style replacement pleated filter for residential and light commercial forced-air HVAC systems requiring a nominal 16 x 25 x 4 inch filter.
Licensed HVAC technicians and qualified service professionals should install this filter. Power down the air handler or furnace before opening the filter compartment and replacing the filter. Verify airflow direction markings on the filter frame align with system airflow before closing the access panel. Follow local mechanical codes and the equipment manufacturer's recommended filter replacement intervals.
Thanks for subscribing!
This email has been registered!