Actual dimensions are 19.5 x 19.5 x 3.75. Accumulair brand 20x20x4 20x20x4 Top Tech compatible whole house filters, specifically designed to replace OEM 20x20x4 Top Tech filters. Fully constructed - no forming or combs required. MERV classified to ASHRAE 52.2 test classifications establishing operation equal to the name brand 20x20x4 Top Tech filters. Note: The sample air filter pic as shown is not to scale and is displayed for design purposes. Company names and 20x20x4 Top Tech part numbers shown for filter replacement purposes.
Shipping and Returns
- Shipping is FREE to the contiguous United States.
- Our current lead times are 3-5 business days for stocked filters (standard 1"-5" thick sizes), up to 3 weeks for made-to-order filters (non-standard and 0.5" sizes).
Delivery normally takes another 1-3 days depending on location.
- 30-day 100% return policy.
Payment & Security
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