1. All Filters
  2. A/C & Furnace Filters
  3. Lennox Furnace Filters

Lennox and Compatible Air Filters by SpiroPure

Lennox AC and furnace filters and compatible aftermarket options improve air quality and maximize energy efficiency, allowing your HVAC system to last longer. At All Filters, we stock a wide selection of OEM and compatible filters in various MERV ratings to suit your specific HVAC system. MERV stands for Minimum Efficiency Reporting Value, and it’s the industry standard for determining how effectively a filter removes particles from the air. We recommend air filters with a MERV rating of between 8 and 11 to effectively remove common airborne particles in most residential systems. If you have a system that is compatible with filters that have higher MERV ratings, you can choose a MERV 13 filter for enhanced air quality.

Lennox Whole House HVAC / AC / Air Conditioner Filters
Lennox

OEM Brand

OEM Part Number

Nominal Size

Filter Options

Lennox

91X23

14x20x1

 SELECT

98N45

14x25x1

 SELECT

91X24

15x20x1

 SELECT

98N46

16x20x1

 SELECT

X0582

16x20x5

 SELECT

98N42

16x25x1

 SELECT

X0581

16x25x3

 SELECT

X5427

16x25x3

 SELECT

HCF16-10

16x25x5

 SELECT

HCXF16-10

16x25x5

 SELECT

X0583, 6660, 7750

16x25x5

 SELECT

X6670

16x25x5

 SELECT

X6672

16x25x5

 SELECT

X8309, X8303

16x25x5

 SELECT

X8312, X8306

16x25x5

 SELECT

X0584

16x26x5

 SELECT

Y6605, Y6612

16x26x5

 SELECT

X8789, X8796

16x26x5

 SELECT

X0444

16x27x6

 SELECT

X5425

16x27x6

 SELECT

X6664, X8349

17x26x4

 SELECT

X6666, X8346, X8347

17x26x4

 SELECT

91X25

18x25x1

 SELECT

98N43

20x20x1

 SELECT

HCF 14-10

20x20x5

 SELECT

X0585

20x20x5

 SELECT

X7935

20x20x5

 SELECT

X8311, X8305

20x20x5

 SELECT

X8314, X8308

20x20x5

 SELECT

X8790, X8797

20x21x5

 SELECT

Y6606, Y6616

20x21x5

 SELECT

98N44

20x25x1

 SELECT

HCF20-10

20x25x5

 SELECT

X0586

20x25x5

 SELECT

X0587

20x25x5

 SELECT

X1152

20x25x5

 SELECT

X5430

20x25x5

 SELECT

X6673

20x25x5

 SELECT

X6675

20x25x5

 SELECT

X8310, X8304

20x25x5

 SELECT

X8313, X8307

20x25x5

 SELECT

X0445

20x25x6

 SELECT

X5424

20x25x6

 SELECT

X8788, X8795

20x26x5

 SELECT

Y6604, Y6608

20x26x5

 SELECT

X6667, X8348

21x26x4

 SELECT

X6669, X8344, X8345

21x26x4

 SELECT

91X26

25x25x1

 SELECT

Wide Range of Lennox and Compatible Air Filters

All Filters stocks a wide range of OEM filters, including different sizes that are compatible with most Lennox systems. Our wide selection ensures you can find the exact filter you’re looking for in one place. You can also choose SpiroPure filters and benefit from significant cost savings. SpiroPure filters are an affordable alternative to branded OEM filters like Lennox furnace filters. SpiroPure products are compatible with top brands like General Aire, Honeywell, and Lennox.

If you need help finding the right filter that fits your system, our friendly and reliable customer support team is available to help you find the exact Lennox air filter you need. If you have information about your HVAC system, like the model, part number, or the size of the filter, our expert team can help you find the right SpiroPure compatible model for your Lennox original. If you’re not sure exactly what you need, our knowledgeable team is here to answer your questions and ensure you get the right filter. Here are some additional reasons to shop at All Filters:

  • Fast, reliable shipping: Most orders are shipped out the same day, ensuring there are no delays in receiving your replacement filters.
  • Competitive pricing: We offer affordable prices every day, and you can take advantage of discounts when ordering value packs.
  • High-quality replacements: Our Lennox air filters and SpiroPure alternatives are high-quality products that are tested to meet strict standards.

Compatible Lennox AC and Furnace Filters Online

Find the ideal filter for your HVAC system from All Filters today. Our wide selection of compatible filters makes it easy to find the exact size and MERV rating for your specific needs. Set a reminder when it’s time to replace your next filter, and we’ll send an automatic notification for your next replacement date.

FAQs on SpiroPure Air Filters for Lennox

Are SpiroPure filters compatible with Lennox HVAC systems?

Yes. SpiroPure produces compatible replacement filters for most Lennox whole-house air cleaner cabinets and ducted return systems. Filters are matched by nominal size and actual dimensions, so they seat properly in Lennox filter housings.
SpiroPure filters use compatible pleated media construction and MERV rating standards as OEM filters. The main difference is cost. SpiroPure compatible filters are typically priced lower, making them a practical choice for homeowners on a regular replacement schedule. If you prefer genuine Lennox filters, those are also available here.
Most residential Lennox systems are designed for MERV 8 to MERV 11 filters. MERV 8 provides solid everyday filtration for dust, pollen, and larger airborne particles. MERV 11 adds meaningful protection against fine dust, pet dander, and allergens. Check your Lennox manual before upgrading to MERV 13 or higher.
Replacement frequency depends on filter thickness and household conditions. Standard 1" pleated filters typically need replacement every 1–3 months. Thick media filters (4–5 inches) used in Lennox Healthy Climate and PureAir cabinets generally last 6–12 months. Homes with pets, high dust, or allergy sufferers should replace at the shorter end of the range.
Yes. SpiroPure filters are available in multi-packs to reduce per-filter cost and ensure you have replacements on hand when the next change is due. All Filters also offers email replacement reminders so you never miss a filter change. Free shipping applies to orders over $99 and SpiroPure Super Value packs.

Copyright © 2026 All Filters LLC. All rights reserved.