True Blue 18 in. x 36 in. x 1 in. Basic Pleated Air Filter (4-Pack)-218361.4 - The Home Depot
Message to Our Customers

True Blue

Model # 218361.4

Internet # 202446727

18 in. x 36 in. x 1 in. Basic Pleated Air Filter (4-Pack)

True Blue 18 in. x 36 in. x 1 in. Basic Pleated Air Filter (4-Pack)

This item has been discontinued.
The Home Depot no longer carries this specific product.
Please select another option below.

$26.98 / package


Model # 218361.4

Internet # 202446727

MERV RATING: 7 - FPR "Filter Performance Rating": 5 - Specifically Designed to Filter Larger Airborne Particles. 28 times more effective than fiberglass filters and will last up to 3 months. Pleated filter material significantly increases the surface area on which airborne particles can be trapped (as compared to Fiberglass Filters). The additional surface area extends the filter life to 3 months. Pleated filter material will also achieve higher MERV ratings than fiberglass filters because it is made to trap much smaller particles. The Pleated Filter Media filters airborne allergens like dust, dirt, and pollen. 100% Synthetic filter media will not support the growth of Bacteria, Mold, or Fungi in normal use.

  • MERV rating: 7 FPR (Filter Performance Rating): 5
  • Last up to 3 months
  • 28 times more effective than fiberglass filters
  • Reduces dust and dirt buildup in air ducts, air conditioner, and furnace system
  • 100% Synthetic filter media will not support the growth of bacteria, mold, or fungi in normal use


Actual Product Depth (in.) 
Actual Product Height (in.) 
Actual Product Width (in.) 
Air Filter Depth (in.) 
Air Filter Height (in.) 
Air Filter Size 
18 in. x 36 in. 
Air Filter Width (in.) 
Air Filter Features 
Filters Dust/Lint,Pleated 
Air Filter Type 
Filter Frame Material 
Filter Material 
Filter Performance Rating (FPR) 
4-5 - Good 
Longevity (months) 
MERV Rating (Minimum Efficiency Reporting Value) 
Warranty / Certifications
Manufacturer Warranty 
Contact Customer Service 


Rated 4.4 out of 5 by 88 reviewers.
Rated 5.0 out of 5.0 by Works great for me I was looking for something that could help remove some of the dust from the air, last at least 60 days, and be a good price. These filters have met all my needs and work great. I would recommend. February 11, 2014
Rated 2.0 out of 5.0 by not great The size is the same as our old filters but flimsy and gets sucked into the shaft more times than not as it bends with the air intake, it doesn't filter well this way and is therefore useless for the kids allergies. August 2, 2013
Rated 4.0 out of 5.0 by Great value for filters I cannot find in stores This size filter is no where to be found in any stores that I look.... I was a fool and asked my AC man if he could find some for me...he did... 12 in a box that cost nearly $100 and they were the really cheap cheap kind. That was last year - I found these online with HD, and they are WONDERFUL!! They don't need to be changed every month, they are sooo much less and they shipped them for free!!! Who couldn't love that? August 31, 2011
Rated 5.0 out of 5.0 by Does the job Good product that does what I need it to do, I recommend it. January 22, 2013
Rated 5.0 out of 5.0 by very good just what I need it It's very difficult to find this kind of ac filters. The size of them are extremely rare. This is the only place where I found them. Thanks! April 14, 2015
Rated 5.0 out of 5.0 by Product is high quality, durable, healthy and does the job it was made to do. The product is well made and will last longer than recommended. It is made from quality materials and functions like a high quality pleated non-fiberglass air filter should. Having used this product for a while I have found a reliability in the uniformity of the product as well. May 20, 2014
Rated 5.0 out of 5.0 by Best product ever used at home It is very light to carry. Very nice design. The quality of product is excellent. I received good review from friends that saw it. Price is reasonable. Shipping arrived in a timely manner. February 26, 2015
Rated 4.0 out of 5.0 by I have a odd size and it is hard to find a good air filter. Have not used these very long but I think they will do the job I think they are a good filter for the money. Now I know where I can find them. Will be ordering more from Home Depot. I have good luck ordering things on line and delivered to the store. February 17, 2015
  • 2015-05-03T10:42:23.273-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_88, tr_88
  • loc_en_US, sid_202446727, prod, sort_default
2 3 4 >>


Standard Shipping includes delivery by small parcel service. Processing time varies by product.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.