--- product_id: 117358376 title: "5-Stage CERTIFIED MERV RATED Electrostatic Washable Permanent Furnace A/C Air Filter – The highest MERV rating of any lifetime filter - Traps particles including MOLD POLLEN SMOKE PET DANDER (24x24x1)" brand: "cas" price: "$183.08" currency: USD in_stock: true reviews_count: 8 url: https://www.desertcart.us/products/117358376-5-stage-certified-merv-rated-electrostatic-washable-permanent-furnace-c store_origin: US region: United States of America --- # 5-Stage CERTIFIED MERV RATED Electrostatic Washable Permanent Furnace A/C Air Filter – The highest MERV rating of any lifetime filter - Traps particles including MOLD POLLEN SMOKE PET DANDER (24x24x1) **Brand:** cas **Price:** $183.08 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** 5-Stage CERTIFIED MERV RATED Electrostatic Washable Permanent Furnace A/C Air Filter – The highest MERV rating of any lifetime filter - Traps particles including MOLD POLLEN SMOKE PET DANDER (24x24x1) by cas - **How much does it cost?** $183.08 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/117358376-5-stage-certified-merv-rated-electrostatic-washable-permanent-furnace-c) ## Best For - cas enthusiasts ## Why This Product - Trusted cas brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Size:24x24x1 You asked for it…here it is. Finally, an electrostatic, washable furnace and a/c filter that is MERV rated!! Introducing the MaxMERV9. The only lab-certified MERV 9 permanent filter. What does MERV 9 mean? It means that this filter traps particles down to 1.0 microns. That includes common allergens like mold, dust mite debris, pollen, pet dander and smoke. Made from rust-proof aluminum and a state-of-the-art polypropylene media weave that achieves MERV 9 filtration and provides good airflow. Move UP to the MaxMERV9 and Never Buy Another Filter! NOTE: This filter has the industry standard 3/8 inch undercut ## Features -  The only lab-certified MERV 9 electrostatic washable filter. This means it has been tested and traps particles down to 1.0 microns. That includes Allergens like Mold, Dust Mite Debris, Pollen, Pet Dander and Smoke. Lab report is available upon request. -  Not all electrostatic filters are equal. This state of the art filter contains cutting edge media that allows for MERV 9 particle arrestance. -  Pleated design allows 40% more surface area. This filter does not require electricity. It develops a natural static charge when air passes through it. This charge captures and holds dust and allergens until washed or vacuumed off. -  Pays for itself in 1 year. Never buy another filter. Lifetime Warranty. 100% Satisfaction Guarantee -  Watch out for overseas counterfeits! A Genuine MaxMERV 9 filter is made in the USA and has a rust-proof aluminum frame, corrugated outer screen and a unique blue and white label. - ›See more product details ## Images ![5-Stage CERTIFIED MERV RATED Electrostatic Washable Permanent Furnace A/C Air Filter – The highest MERV rating of any lifetime filter - Traps particles including MOLD POLLEN SMOKE PET DANDER (24x24x1) - Image 1](https://images-na.ssl-images-amazon.com/images/I/A1f0HQcv2cL.jpg) ![5-Stage CERTIFIED MERV RATED Electrostatic Washable Permanent Furnace A/C Air Filter – The highest MERV rating of any lifetime filter - Traps particles including MOLD POLLEN SMOKE PET DANDER (24x24x1) - Image 2](https://images-na.ssl-images-amazon.com/images/I/A1paK0ofwEL.jpg) ![5-Stage CERTIFIED MERV RATED Electrostatic Washable Permanent Furnace A/C Air Filter – The highest MERV rating of any lifetime filter - Traps particles including MOLD POLLEN SMOKE PET DANDER (24x24x1) - Image 3](https://images-na.ssl-images-amazon.com/images/I/51IllIVn9-L.jpg) ![5-Stage CERTIFIED MERV RATED Electrostatic Washable Permanent Furnace A/C Air Filter – The highest MERV rating of any lifetime filter - Traps particles including MOLD POLLEN SMOKE PET DANDER (24x24x1) - Image 4](https://images-na.ssl-images-amazon.com/images/I/81qt8sqll7L.jpg) ![5-Stage CERTIFIED MERV RATED Electrostatic Washable Permanent Furnace A/C Air Filter – The highest MERV rating of any lifetime filter - Traps particles including MOLD POLLEN SMOKE PET DANDER (24x24x1) - Image 5](https://images-na.ssl-images-amazon.com/images/I/81r7cxpg0qL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great filter that works! *by R***Z on Reviewed in the United States on February 1, 2018* Very noticeable difference in how much more airflow there is compared to even the lower MERV pleated filters. Have tired another brand of washable filter and this one seems to have caught more in two weeks than the other brand did in a month. Also very easy to clean with garden hose or even in the shower. Now I don't have to worry about compromising airflow for better filtration, have peace of mind the evaporator coil will stay clean and that the system will have less stress. (Pictures I posted were taken two weeks after installing it) ### ⭐⭐⭐⭐⭐ Nice Rated Merv. 9 Washable Filter *by C***R on Reviewed in the United States on January 13, 2018* I purchased 3-MaxMerv9 filters for two H/A returns to have an extra clean set available (already had a washable Gold Filter) for easy replacement, no waiting for them to dry. I bought these filters to replace some high quality Filtrate 1900 filters previously purchased on Amazon that were very good, quiet, but some what restrictive on air flow and expensive for on going use.First impression: The filters are well made, quiet with very little air flow restriction and the only washable Merv. rated filters I could find. I am replacing my present Gold Filter (94 air arrest) which seems to have a stronger aluminum frame than the MaxMerv9, however, it is not Merv. Rated, and seems to be somewhat noisy and more restrictive in air flow. I will keep everyone updated in 6-months or so with any additional comments. But at this time I highly recommend this filter! 👍😃 ### ⭐⭐⭐⭐⭐ Very Efficient, Good Filtration And Cost Savings! *by W***K on Reviewed in the United States on March 7, 2018* This type of filter was recommended by our A/C installer/specialist, for the best operation and long life of our air handler. The filter arrived and it fit perfectly! Though I have no scientific way of measurement, I can say that the air passes through freely and it is definitely filtering a lot of material. We have dogs and so hair and dander are always a concern, plus we get a lot of allergens in our area. This filter stops most everything that gets to it. I would not hesitate to buy another if needed and I highly recommend this filter to my friends and family! This filter will save me a small fortune when compared to the other throw-away filters that do half as much and get replaced every two weeks. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/117358376-5-stage-certified-merv-rated-electrostatic-washable-permanent-furnace-c](https://www.desertcart.us/products/117358376-5-stage-certified-merv-rated-electrostatic-washable-permanent-furnace-c) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-17*