January 22, 2026
Both brands make pleated residential air filters, offer custom sizes, ship free within the U.S., and run a subscription program, so the gap between them is smaller than it looks. What actually differs is the rating range each one carries, the depths they stock, and how you prefer to reorder. Start with fit: a filter that seals the opening beats a higher-rated one that leaks air around the frame.
Filterbuy — MERV 8, 11, and 13. Custom sizes in 1/8-inch steps. 1", 2", and 5" cabinet depths. Auto-Delivery.
Nordic Pure — MERV 11, 12, and 13. Dedicated custom-size ordering. 1", 2", and 4–6" depths. Subscribe & Save at 10%.
Both — pleated filters up to MERV 13, activated-carbon options, and free shipping in the continental U.S.
Here is what each rating captures, so you can match the number to your system.
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Already know your size? Shop Filterbuy air filters with free shipping in the continental U.S.
If you’re cross-shopping Filterbuy vs. Nordic Pure, start with fit. A filter that seals the opening beats a “better” filter that leaks air around the frame. Both Filterbuy and Nordic Pure sell popular sizes and let you order custom dimensions for tricky returns, so dialing in the fit is straightforward. After that, pick the MERV level your HVAC manual allows, and decide how you want to buy and replace—direct delivery with subscriptions and free shipping is available from both brands.
Both brands cover residential needs and support custom sizes, so start with fit.
Filterbuy leans into MERV 8/11/13, free shipping, quick ship times, and easy Auto-Delivery.
Nordic Pure offers MERV 11/12/13, carbon variants, Subscribe & Save (10%), and fast-free shipping within the contiguous U.S.
Choose by compatibility and habit: get the best-sealing size, the MERV your system supports, and a replacement cadence you’ll maintain.
Compare filter ratings, carbon options, custom sizing, available depths, subscriptions, and shipping.
| Feature | Filterbuy | Nordic Pure |
|---|---|---|
| Core ratings |
|
Broader lineup explained on site
|
| Carbon options |
Odor Eliminator Activated-carbon Odor Eliminator |
Pure Carbon and MERV-plus-Carbon |
| Custom sizes | Yes — enter exact size in 1/8" steps | Yes — dedicated custom-size ordering |
| Depths | 1", 2", plus 5" cabinet formats | 1", 2", and 4–6" formats, depending on the model |
| Subscriptions | Auto-Delivery directly from Filterbuy | Subscribe & Save with 10% savings |
| Shipping | Free shipping in the continental U.S.; many pages note approximately 24-hour fulfillment | Fast, free shipping in the contiguous U.S.; manufacturer-direct |
Filterbuy organizes its lineup by MERV 8, 11, and 13. At the top of that range, Filterbuy’s MERV 13 is advertised to trap up to 98% of particles as small as 0.3 microns. As with any upgrade, choose the highest rating your HVAC manual approves.
Nordic Pure offers a broader spread, including MERV 11/12/13, with product pages that explain what each level targets and where it’s typically used. Match the rating to your unit’s guidance so you maintain proper airflow.
Quick note: MERV 8 handles everyday dust and lint, MERV 11–12 steps up for smaller allergens (often helpful in homes with pets), and MERV 13 aims at finer particles—provided your equipment is designed for it.
Both brands sell popular standard sizes and support custom dimensions. Filterbuy lets you enter measurements in 1/8-inch increments to dial in a snug, no-bypass fit, while Nordic Pure provides an exact-size ordering path with guidance on when to select “actual” vs “nominal” dimensions.
Depth choices are similarly flexible. Filterbuy offers 1" and 2" pleats along with cabinet formats (e.g., 20×25×5), and Nordic Pure lists 1", 2", and deeper 4–6" options depending on the model. Choose the thickness your system was built to use.
Filterbuy offers an activated-carbon Odor Eliminator pleated filter that helps cut everyday odors and some VOCs while still catching routine dust.
Nordic Pure sells Pure Carbon filters and versions that combine a MERV rating with a carbon layer, so you can reduce smells and keep the particle level you want.
Always check that your HVAC system can handle the rating you choose.
Filterbuy: Free shipping on every order within the continental U.S. No expedited shipping, and shipping is limited to the continental U.S. Bulk pricing is available for orders $1,000+ (apply first). Returns: if a product is defective within 90 days, Filterbuy will arrange a free return/exchange. After 90 days or for non-defect reasons, you may pay return shipping—contact support for authorization.
Nordic Pure: Ships manufacturer-direct with free shipping in the contiguous U.S. Offers Subscribe & Save (10%) for scheduled deliveries. Always double-check current shipping and return terms at checkout.
Fit first. Match the size printed on your current filter; if the opening isn’t a true standard, order a custom cut so the frame seals with no gaps.
Confirm the rating. Use the highest MERV your HVAC manual allows; if you upgrade and notice airflow or comfort issues, step back to the approved level.
Add what you need. Pick carbon if odors/VOCs are a priority and use deep cabinet (4–6") filters only if your system is built for them.
Set the cadence. Plan replacements (often every 2–3 months for 1" pleats, longer for deep filters) and turn on Auto-Delivery/Subscribe & Save so you never miss a change.
Choose the filter that fits your system. Use the exact size on your current filter. Order a custom size if the opening is even a little off. Pick the highest MERV your HVAC manual allows. Add carbon if odors are a problem and choose a deep cabinet filter only if your unit uses one. Set a change schedule you can keep. Then check out with free continental U.S. shipping and turn on Auto-Delivery or Subscribe & Save so replacements arrive on time.
Choose the one that fits your opening exactly, supports the MERV your system allows, and matches how you prefer to buy (direct delivery with subscriptions is available from both).
Yes. Both sell pleated filters up to MERV 13. Just confirm your HVAC manual allows it.
Yes. Both brands support custom dimensions to help you get a tight, no-bypass seal.
Yes. Each brand offers activated-carbon options aimed at reducing common smells and some VOCs.
A simple rule is every 2–3 months (change sooner with pets, smoke, or heavy dust). Thicker cabinet filters typically last longer. Follow the product guidance and your HVAC manual.
It can. Higher ratings add resistance. Check your unit’s specifications and step back if you notice airflow or comfort issues.
Use the size printed on your current filter or measure the opening and order that exact size; go custom if the fit is even slightly off.
Yes, if your system is designed for them. Only choose deeper formats when your unit specifies a cabinet filter.
Snug with no gaps or wobble. A tight seal prevents air from bypassing the media.
Yes. Both provide direct-to-door shipping and an optional subscription, so replacements arrive on schedule; check current terms at checkout.
