Admin Filter King has a fresh round of promo codes out for furnace and AC filters, and if your filter is overdue, this is a cheap week to restock. Use code HIP2SAVE20 for 20% off 12-packs or larger, or HIP2SAVE15 for 15% off 6-packs through 11-packs. Shipping is free on top of the discount, and the codes were published November 4 for Filter King’s current promotion.
What you’re getting: Filter King promo codes: 20% off 12-packs or larger with HIP2SAVE20, 15% off 6-packs through 11-packs with HIP2SAVE15; Free shipping on Filter King orders, plus an extra 5% off with Subscribe and Save auto-delivery; American-made furnace and AC air filters in nearly every size, including custom cuts; 30-day returns if the filters are not right for your system. This is the kind of value that speaks for itself — no inflated anchor price to untangle. A 12-pack is already the cheapest per-filter way to buy, and another 20% off plus free shipping makes a full year of changes easy to cover in one order.
Who’s it for? Anyone shopping in this category who doesn’t want to pay full price for a well-reviewed name brand. Filter King earns its keep on range alone — American-made filters in just about every size, including custom cuts — so measure your return grille before you order.
To use the codes, add your filters to your cart at Filter King and apply HIP2SAVE20 (or HIP2SAVE15 for a smaller pack) at checkout. Enter the code exactly as shown. No expiry date is stated for this code cycle, so treat it as limited-time rather than permanent.
Pros and cons
- Pro: 20% off a 12-pack is the cheapest per-filter route to a full year of changes
- Pro: Free shipping stacks on top of the code discount
- Pro: Subscribe and Save adds another 5% and you can pick 1, 2, 3, 6 or 12 month delivery
- Con: You need to know your exact filter size before ordering, including custom sizes
- Con: The bigger discount only applies to 12-packs or larger; smaller packs get 15%
- Con: No expiry date is stated for this code cycle, so it could end without warning
Price details
Offer: 20% off 12-packs with code HIP2SAVE20 (15% off 6-11 packs with HIP2SAVE15, free shipping) — Offer verified: 2026-11-05T05:49:51Z.
Price verified: 2026-11-05T05:49:51Z (UTC). Prices and availability change fast, especially on popular deals — if the price has moved since verification, the deal may have ended. Shipping terms and return policies are set by Filter King, so give those a quick look before you buy.
