Actual dimensions are 17.25 x 20.75 x 4.38. Accumulair brand, 17.5x21x4.5 Ruud Protech 540016 style whole house filters, specifically constructed to replace the name brand Ruud Protech 540016 air filters. Fully constructed so no forming or combs required. MERV rated to ASHRAE 52.2 test specifications establishing filtration as good or better than the original brand Ruud Protech 540016 filters. Photo: Sample filter pic as displayed is not to scale and is there to show configuration purposes. Trade names and Ruud Protech 540016 part numbers are used for air filter replacement purposes only.
Shipping and Returns
- Our current lead times are 4-6 business days for stocked filters (standard 1"-5" thick sizes), and up to 8-12 business days for made-to-order filters (non-standard and 0.5" sizes). Delivery normally takes another 1-3 days depending on location.
- Shipping is FREE to the contiguous United States.
- 30-day 100% return policy.
Payment & Security
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