Household essentials price guide
Air Filter Price Comparison: Cost per Filter
Compare HVAC air filter prices by size, MERV rating, filter count, thickness, multipack value, Home Depot, Lowe's, Walmart, and Amazon options.
Published July 16, 2026 · Reviewed July 16, 2026
Best places to buy
Best places to buy air filters
Start with Amazon affiliate options for delivery and subscriptions, then cross-check Walmart, Target, and Costco source pages for pickup, promos, bulk packs, and final checkout terms.
Disclosure: This page may contain affiliate links. Price Scout may earn a commission at no extra cost to you. As an Amazon Associate I earn from qualifying purchases.
Research methodology
How Price Scout compares air filters
The goal is to compare verifiable retailer-source information without presenting unlike package prices as equivalent deals.
Every displayed retailer price includes a source link and retrieval timestamp.
Unit values are compared only when package size and unit type can be normalized reliably.
Different formulas, sizes, counts, scents, and fulfillment terms remain separate comparison considerations.
Amazon is an outbound paid-link option only; this guide does not display Amazon prices, ratings, reviews, images, or availability.
Match size first
A 20x20x1 filter and a 20x25x1 filter are not substitutes. Size must match before price matters.
Compare MERV level
MERV 8, 11, and 13 filters can have different airflow and filtration tradeoffs, so compare similar ratings.
Confirm the pack
Use source links to verify dimensions, thickness, filter count, delivery timing, and return options.
Current source-backed signals
Cached prices Price Scout already has
These cards reuse saved Walmart deal data and trending comparisons when available, giving you a recent starting point before you open retailer pages.
No cached air filters prices are available right now. The guide still works as an evergreen shopping checklist, and visitors can run a live search when they need current local prices.
What to compare
- Exact length, width, and thickness printed on the current filter.
- MERV rating or comparable filtration claim.
- One-pack, three-pack, six-pack, and subscription prices.
- Home Depot, Lowe's, Walmart, Costco, and Amazon availability.
- Shipping, pickup timing, return policy, and replacement schedule.
Timing tips
- Buy multipacks only after confirming the exact size and MERV rating work with your system.
- Compare Home Depot and Lowe's for pickup timing when a replacement is needed quickly.
- Check Amazon when multipacks and delivery timing beat local pickup.
- Recheck price before seasonal HVAC demand periods.
Stores to check
Where to compare air filters
Use these as starting points, then confirm final checkout price, fulfillment, and stock on the retailer site.
Home Depot
Best for: Local pickup, project-supply context, and home-maintenance categories.
Watch: Confirm exact size, model, quantity, pickup timing, and local stock.
Open sourceLowe's
Best for: Home-maintenance categories, local pickup, and project planning.
Watch: Confirm exact size, model, quantity, pickup timing, and local stock.
Open sourceWalmart
Best for: Broad product selection, pickup baselines, and store-brand comparisons.
Watch: Confirm exact package, local store, seller, and fulfillment details.
Open sourceTarget
Best for: Target Circle promotions, store brands, pickup, and same-day options.
Watch: Circle offers and card savings can change the effective checkout price.
Open sourceCostco
Best for: Warehouse multipacks and stock-up sizes.
Watch: Membership, storage, warehouse, online, and same-day prices can differ.
Open sourceCommon buying mistakes
- Buying the wrong size because the dimensions look close.
- Comparing MERV ratings as if they are identical.
- Ignoring thickness when the return grille or furnace slot requires a specific depth.
- Using price alone instead of checking HVAC system guidance.
Before you make the trip
Run a fresh source-backed check when the cart matters.
The guide helps you decide what to inspect. The live comparison is for current local prices, current stock, and final retailer source links.
Compare live pricesFrequently asked questions
How do you compare air filter prices?
Match size, thickness, and MERV rating first, then divide final price by filter count.
Is a higher MERV filter always better?
Not always. Higher MERV can affect airflow in some systems, so follow HVAC system guidance and compare similar ratings.
Are multipack air filters cheaper?
Often, but only if the size, thickness, and MERV rating are exactly right and you will use them on schedule.
Should air purifier filters be included?
No. This guide covers HVAC and furnace air filters, not water, oil, coffee, vacuum, or air purifier replacement filters.
Related Price Scout pages
Retailer source links
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