Don’t Wait Breathe Cleaner Air Today
Stock up on furnace filters and enjoy fast, free shipping. Order now and keep your home comfortable year-round.
Popular Sizes
Thickness 1"
Thickness 4"
Thickness 5"
Short Side
Long Side
Thickness
FAST SHIPPING
Most orders placed by 5 PM EST ship the same day, so you won’t have to wait for cleaner air. We stock the most common sizes and offer free shipping on orders over $50, making it simple to stay on schedule and keep your system running smoothly.
Learn more
HERITAGE
For more than 70 years, our family has helped homeowners take care of their heating and cooling needs. What started as a small garage business has grown into a trusted online store. Every order is handled with the same care and commitment that has guided us since day one.
Learn more
QUALITY
We stock filters and home comfort products from trusted brands like Lennox, Aprilaire, and Honeywell. Each order is carefully packed and shipped ready to use. With Same Day Supply, you can count on dependable products, friendly service, and the right fit for your home.
Learn moreBrowse Top Categories
-
Furnace Filters
OEM furnace filters from top brands including, Lennox, Trion Air Bear, Trane,...
-
Humidifiers
Replenish the moisture in your home back to the recommended level of...
-
Dehumidifiers
Dehumidifiers from Aprilaire, Honeywell, Lennox, Sradler Form, Trion and more. Huge Selection...
Our Top Brands
Browse Top Products
-
Lennox X6670 MERV 11 Replacement Filter (16 x 25 x 5")
Regular price From $41.38 USDRegular priceUnit price per -
Lennox X6673 MERV 11 Replacement Filter (20 x 25 x 5)
Regular price From $44.23 USDRegular priceUnit price per -
Lennox X6672 MERV 16 Replacement Filter (16 x 25 x 5")
Regular price From $87.19 USDRegular priceUnit price per -
Lennox X6675 MERV 16 Replacement Filter (20 x 25 x 5)
Regular price From $113.92 USDRegular priceUnit price per
TESTIMONIALS
What our customers say about us
How do I know my filter size?
Check your existing filter — the size is usually printed on the frame. If not, measure length, width, and depth (in inches) to find the correct replacement.
How often should I replace my filter?
It depends on filter size, MERV rating, and your home’s conditions. Many homeowners replace every 60–90 days under average use. If you have pets, allergies, or high system use, you may need to change more often. Some high-efficiency filters can last 6–12 months in mild conditions. Always check your manufacturer’s recommendations for the best schedule for your system.
What is a MERV rating and what should I choose?
MERV (Minimum Efficiency Reporting Value) shows how well a filter captures particles between 0.3–10 microns. A MERV 8–11 is a great balance for most homes (dust, pollen, pets), while MERV 13+ is better for allergy, asthma, or smoke concerns — if your HVAC system can handle the higher airflow restrictions.
Do higher-rated filters harm my HVAC system?
They can if your system isn’t designed for them. Higher MERV filters block more particles but may reduce airflow. Always check your system’s specs or manual before moving up.
Call Us Now
888-787-7284