Stock 501 Filters

We sell Aprilaire stock number 501 filters, supplies and parts for the Aprilaire 5000 electronic air filter to you at low prices! The stock 501 filters are also referred to as Aprilaire Model 501 filters. The filters are genuine Aprilaire OEM filters made specifically for the Aprilaire 5000 electronic air filter. We sell the Aprilaire model 501 filters individually, in 2-packs, 4-packs and by the case.  Please email us anytime if you have questions. Our email address is: support@arnoldservice.com Same Business Day Fast Shipping! We would love to help you out and have your business!