Most Popular Filter Sizes
18x24x4 Furnace Filter
This 18x24x4 filter measures:
17 3/8 x 23 3/8 x 3 3/4 inches. Can replace any brand of filter. Get premium-quality furnace and air conditioning filters that are made in North America by Camfil. Best of all, get FREE SHIPPING on all orders sent via Canada Post. Usually sent within one business day.
Side-by-Side comparison.Helping you select the best option:
MERV 8 - High Capacity 5-STAR Energy Cost Index – This 30/30 High-Capacity Pleated Panel Filteris your best value for efficiency filtration, guaranteed to perform at the rated efficiency or better. With a six-month life, you can rest easy knowing you won’t be changing filters as often. Featuring high wet-strength beverage frame and welded wire media backing, this filter provides structural integrity in any type of HVAC application.
For your convenience, each box contains 6 Filters. Don’t need that many? Call a friend and ask to divide the cost.
In Stock: Get your shipment within one business day!
AP-3 from CAMFIL
MERV 8–Standard Capacity 18x24x4 Pleated Filter designed toremove many contaminants affecting indoor air quality concerns. This economical choice is built for today’s HVAC system demands, boasting an Energy Cost Index of 2 stars. Offers protection for higher efficiency filters needed in today’s high-technology applications. This filter should be changed every 3 months.
Don’t head to the store every time you need a furnace filter, searching through the shelves for the one you need. Why not buy in bulk and save? Each box contains 6 filters. Split the cost with a friend on Facebook!
This item is currently IN-STOCK, which means we will ship it within 1 business day.
All items feature FREE SHIPPING in CANADA via CANADA POST, shipping direct from the factory. Most orders ship within one business day. Order online and save yourself the hassle of trekking to the hardware store every time you need to change your air filter.
IMPORTANT: Buyers must cover the shipping and handling fees for any returned items.
NOTE: If an item you want is out of stock, we will notify you by email and let you know the ship date. Product photos -- used for illustrative purposes only -- do not necessarily represent the actual product you may get in the mail.