Actual dimensions are 15.75 x 24.25 x 3. Brand: Accumulair. 16x25x3 GeneralAire 4521 style whole house air filters, exactly constructed to replace OEM GeneralAire 4521 filters. Fully built with no assembly or combs needed. MERV classified to ASHRAE 52.2 test standards assuring particulate capture as good or better than the OEM GeneralAire 4521 air filter. Photo: The example filter picture as shown is not to scale and is included to show configuration purposes only. Name brands and GeneralAire 4521 P/N are included for filter replacement identification only.
Shipping and Returns
- Our current lead times noted at the top of the page are due to backlogs, supply chain issues, and staffing shortages. We apologize for the inconvenience.
- Shipping is FREE to the contiguous United States.
- 30-day 100% return policy.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.