The Factory Direct Filters page currently shows the 10% off coupon code at the top of this page, which takes 10% off your order on air filter replacement goods and other home filtration products and is best for routine purchases under large sale or multi-pack thresholds. It needs a promo code at checkout and works on website orders. Free shipping applies to all orders so you do not need to meet a delivery threshold.
Small single items or routine buys (under $100): use the 10% off coupon at the top of this page. For example, on a $120 order the code takes 10% off, reducing the total from $120 to $108, a saving of $12. The sitewide 10% code listed second gives the same saving if it applies to the items in your cart, so either code that works will match this result.
Buying sale items: check the sale prices first. The sale offers include up to 80% off select sale products. If an item is already in the sale, the clearance discount can be far bigger than 10% depending on the item; the sale discount applies without a code and is the right pick when the product you want is in the sale, regardless of cart size. For example, an item marked down from $120 to 24% of its price by an 80% reduction would cost $24, saving $96 versus using a 10% coupon.
Buying multi-packs of 6 or more filters: choose the multi-pack sale, which gives up to 55% off selected multi-pack lines. For a $200 multi-pack the 55% discount reduces the price to $90, a saving of $110, which is larger than the 10% code would save ($20 on the same $200). The multi-pack offer applies only to eligible products and does not require a promo code.
Signing up for a subscription: if you plan to buy on a subscription, the 8% off each subscription order applies to subscription items. For a $120 subscription order, 8% off reduces the payment to $110.40, saving $9.60. Compare that with the 10% code on a one-off purchase; the one-off code saves more on the first payment but the subscription discount repeats on future deliveries.
First time newsletter signup: the newsletter signup is available but is not the page lead offer. Use newsletter offers only when you want email promotions; it is useful for low spend or for catching future codes but it is not shown as a checkout promo here.
Our records for the 12 months to October 2026 show 37 offers listed for Factory Direct Filters (34 codes and 3 sales). Percentage codes in that time typically ran at 13% and the biggest tested code was 22% off in December 2025. Our team tested 34 Factory Direct Filters codes at checkout in the 12 months to October 2026, with 20 of those tests saved with a screenshot.
Choose the single option that gives the lowest final price. Use the multi-pack sale for eligible 6+ filter purchases, use the sale prices when an item is in the up to 80% sale, otherwise apply the 10% off promo code at the top of this page or the sitewide 10% code if it is accepted. There is no stated rule on combining these offers, so do not count on stacking codes.
