Hero image 0 of Allergyzone FilterLock MERV 1 Furnace Filter Slot Seal Door Cover, 12x4.8x0.1, 0 of 4
Allergyzone FilterLock MERV 1 Furnace Filter Slot Seal Door Cover, 12x4.8x0.1
Key item features
- Air Leakage Prevention: Sealing air leakage/by-pass at the filter slot/door forces dirty air to travel through the filter instead of around it
- Reusable Design: Reusable overlapping 2-piece design works with any brand 1 in. air filter up to 25 in. L
- Magnetic Attachment: FilterLock has built-in magnets which hold it securely to the metal duct work
- Tool-Free Installation: Installs in seconds without the use of any tools
- Energy Efficient: Energy Star identified air leakage at the furnace and filter slot/door as 1 of 4 major problems with duct work
- DOE Recommendation: FilterLock satisfies the department of energy recommendation that the furnace filter slot be covered to avoid air leaks
Generated by AI
Specs
- Minimum efficiency reporting values (merv)0
- FeaturesReusable
- Microparticle performance rating99
- Thickness4.75 in
- MaterialPlastic
- Rec. useResidential
Current price is USD$12.99$12.99/count
Price when purchased online
- Free shipping
Free 30-day returns
How do you want your item?
Columbus, 43215
Arrives by Mon, Mar 2
|
Sold and shipped by Filter-Monster|Pro Seller
4.596610169491526 stars out of 5, based on 295 seller reviews(4.6)295 seller reviews
Free 30-day returns
Similar items you might like
Based on what customers bought
Merv 8 Reusable Air Vent Filter Cut to Fit Electrostatic Floor Vent Filter Washable Replacement Ac Filter Compatible $9.94 Was $11.72
$994current price $9.94, Was $11.72$11.72Merv 8 Reusable Air Vent Filter Cut to Fit Electrostatic Floor Vent Filter Washable Replacement Ac Filter Compatible
112.6 out of 5 Stars. 11 reviewsAir Vent Carbon Filters 10x12 (Register Vent Filters) 1 Pack of 6 $11.99 Was $14.99
$1199current price $11.99, Was $14.99$14.99Air Vent Carbon Filters 10x12 (Register Vent Filters) 1 Pack of 6
274.1 out of 5 Stars. 27 reviews500+ bought since yesterday Filtrete 20x25x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter $5.64
500+ bought since yesterday
$564current price $5.64Filtrete 20x25x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter
18484.6 out of 5 Stars. 1848 reviewsFilter King 23.5x23.5x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated AC Furnace Filter | MADE IN USA | Actual Size 23.5 x 23.5 x .75" $38.84
$3884current price $38.84Filter King 23.5x23.5x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated AC Furnace Filter | MADE IN USA | Actual Size 23.5 x 23.5 x .75"
25 out of 5 Stars. 2 reviews100+ bought since yesterday Filtrete 20x30x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter $5.64
100+ bought since yesterday
$564current price $5.64Filtrete 20x30x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter
8194.5 out of 5 Stars. 819 reviewsBest seller Filtrete 16x20x1 HVAC Furnace Air Filter, MPR 300 MERV 5, Dust Reduction, 4 Filters $16.43 Was $18.42
Best seller
$1643current price $16.43, Was $18.42$18.42Filtrete 16x20x1 HVAC Furnace Air Filter, MPR 300 MERV 5, Dust Reduction, 4 Filters
4364.6 out of 5 Stars. 436 reviews100+ bought since yesterday Filtrete 14x30x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter $5.64
100+ bought since yesterday
$564current price $5.64Filtrete 14x30x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter
3064.5 out of 5 Stars. 306 reviewsGreat Value; 16x20x1; MERV 13 BEST HVAC Air and Furnace Filter; Captures Dust; 4 Filters $13.84
2 optionsAvailable in additional 2 options$1384current price $13.84Great Value; 16x20x1; MERV 13 BEST HVAC Air and Furnace Filter; Captures Dust; 4 Filters
684.8 out of 5 Stars. 68 reviewsBest seller Filtrete 16x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter $13.44
Best seller
$1344current price $13.44Filtrete 16x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter
10224.6 out of 5 Stars. 1022 reviewsAaf/ 10055.012030 EZ Flow II 20x30x1-In. Flat Panel Spun Fiberglass Furnace Filter, Must Be Purcha - Quantity 12 $59.99
$5999current price $59.99Aaf/ 10055.012030 EZ Flow II 20x30x1-In. Flat Panel Spun Fiberglass Furnace Filter, Must Be Purcha - Quantity 12
Filter King 18x20x1 Air Filter | 12-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75" $96.05
$9605current price $96.05Filter King 18x20x1 Air Filter | 12-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 19.5 x .75"
Dust Control Furnace AC Register Air Vent Filters 4" x 10", 24 Pack $17.99
$1799current price $17.99Dust Control Furnace AC Register Air Vent Filters 4" x 10", 24 Pack
614.3 out of 5 Stars. 61 reviewsUCINNOVATE Cut to Size Air Vent Filters, 12" x 90" Floor Vent Filters for Home, MERV 8 Electrostatic Air Filter Roll for Wall HVAC Furnace Vents with 66Pcs Adhesive Hooks $16.99 Was $19.99
2 optionsAvailable in additional 2 options$1699current price $16.99, Was $19.99$19.99UCINNOVATE Cut to Size Air Vent Filters, 12" x 90" Floor Vent Filters for Home, MERV 8 Electrostatic Air Filter Roll for Wall HVAC Furnace Vents with 66Pcs Adhesive Hooks
144.2 out of 5 Stars. 14 reviews16x25x1, Percisionaire 40ldp Merv 8, 80055.011625, Pack12 $84.28 Was $93.67
$8428current price $84.28, Was $93.67$93.6716x25x1, Percisionaire 40ldp Merv 8, 80055.011625, Pack12
100+ bought since yesterday Filtrete 24x24x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter $5.64
100+ bought since yesterday
$564current price $5.64Filtrete 24x24x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter
3284.5 out of 5 Stars. 328 reviewsBest seller Filtrete 16x25x1 HVAC Furnace Air Filter, MPR 300 MERV 5, Dust Reduction, 4 Filters $19.52
Best seller
$1952current price $19.52Filtrete 16x25x1 HVAC Furnace Air Filter, MPR 300 MERV 5, Dust Reduction, 4 Filters
6284.5 out of 5 Stars. 628 reviewsFilterbuy 14x20x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack) $10.97 $10.97/count
$1097current price $10.97$10.97/countFilterbuy 14x20x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (1-Pack)
194.8 out of 5 Stars. 19 reviewsBest seller Filtrete 14x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter $13.44
Best seller
$1344current price $13.44Filtrete 14x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 1 Filter
5664.7 out of 5 Stars. 566 reviewsBest seller Filtrete 14x25x1, MERV 10, Micro Particle Reduction HVAC Furnace Air Filter, 800 MPR $11.88
Best seller
3 optionsAvailable in additional 3 options$1188current price $11.88Filtrete 14x25x1, MERV 10, Micro Particle Reduction HVAC Furnace Air Filter, 800 MPR
5894.3 out of 5 Stars. 589 reviewsBest seller Filtrete 14x14x1, MERV 10, Micro Particle Reduction HVAC Furnace Air Filter, 800 MPR $11.88
Best seller
3 optionsAvailable in additional 3 options$1188current price $11.88Filtrete 14x14x1, MERV 10, Micro Particle Reduction HVAC Furnace Air Filter, 800 MPR
3894.3 out of 5 Stars. 389 reviews
About this item
Product details
Filter Lock
Allergyzone FilterLock MERV 1 Furnace Filter Slot Seal Door Cover, 12x4.8x0.1
- Seals air leakage and bypass at the filter slot and door, ensuring dirty air travels through the filter
- Reusable overlapping 2-piece design compatible with any brand 1 in. air filter up to 25 in. L
- Equipped with built-in magnets for secure attachment to metal ductwork
- Installs quickly in seconds without the need for tools
- Addresses major ductwork issues identified by Energy Star, including air leakage at the furnace and filter slot/door
- Meets Department of Energy recommendations to cover the furnace filter slot to prevent air leaks
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. Â
Specifications
Minimum efficiency reporting values (merv)
0
Brand
Allergyzone
Features
Reusable
Microparticle performance rating
99
Warranty
Warranty information
ONE YEAR LIMITED WARRANTY
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Check out these related products
Filtrete by 3M, 14x20x1, Elite Allergen Reduction HVAC Furnace Air Filter, 2200 MPR, 1 Filter $25.00
5 optionsAvailable in additional 5 options$2500current price $25.00Filtrete by 3M, 14x20x1, Elite Allergen Reduction HVAC Furnace Air Filter, 2200 MPR, 1 Filter
3144.6 out of 5 Stars. 314 reviewsFiltrete 16x25x1 HVAC Furnace Air Filter, MPR 1900 MERV 13, Ultimate Allergen Reduction, 1 Filter $31.00
$3100current price $31.00Filtrete 16x25x1 HVAC Furnace Air Filter, MPR 1900 MERV 13, Ultimate Allergen Reduction, 1 Filter
6484.8 out of 5 Stars. 648 reviewsFiltrete 20x20x1 HVAC Furnace Air Filter, MPR 1900 MERV 13, Ultimate Allergen Reduction, 4 Pack $77.17 Was $86.74 $19.29/ea
$7717current price $77.17, Was $86.74$86.74$19.29/eaFiltrete 20x20x1 HVAC Furnace Air Filter, MPR 1900 MERV 13, Ultimate Allergen Reduction, 4 Pack
6514.8 out of 5 Stars. 651 reviewsFiltrete 20x20x1 Air Filter, MPR 1500 MERV 12, Advanced Allergen Reduction, 6 Filters $82.74 Was $92.64
$8274current price $82.74, Was $92.64$92.64Filtrete 20x20x1 Air Filter, MPR 1500 MERV 12, Advanced Allergen Reduction, 6 Filters
4574.8 out of 5 Stars. 457 reviewsFiltrete 10x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 4 Pack $41.63 $10.41/ea
$4163current price $41.63$10.41/eaFiltrete 10x20x1 HVAC Furnace Air Filter, MPR 1000 MERV 11, Allergen Defense, 4 Pack
5234.7 out of 5 Stars. 523 reviewsFilter King 13x25x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 12.5 x 24.5 x .75" $42.00
$4200current price $42.00Filter King 13x25x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 12.5 x 24.5 x .75"
Filtrete 14x24x1, MERV 12, Advanced Allergen Reduction HVAC Furnace Air Filter, 1500 MPR $18.47
2 optionsAvailable in additional 2 options$1847current price $18.47Filtrete 14x24x1, MERV 12, Advanced Allergen Reduction HVAC Furnace Air Filter, 1500 MPR
6044.8 out of 5 Stars. 604 reviewsHoneywell 16x25x1 MERV 12 Pleated HVAC Furnace Air Filter -4 Pack $47.64 $47.64/ca
$4764current price $47.64$47.64/caHoneywell 16x25x1 MERV 12 Pleated HVAC Furnace Air Filter -4 Pack
134.1 out of 5 Stars. 13 reviewsFilter King 25x25x1n Air Filter | 4-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 24.75 x 24.75 x .75" $64.64
$6464current price $64.64Filter King 25x25x1n Air Filter | 4-PACK | MERV 13 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 24.75 x 24.75 x .75"
65 out of 5 Stars. 6 reviewsFilter King 30x36x2 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 30 x 36 x 1.75" $127.68
$12768current price $127.68Filter King 30x36x2 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 30 x 36 x 1.75"
124.8 out of 5 Stars. 12 reviewsFilterbuy 20x27x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (5-Pack) $101.95
$10195current price $101.95Filterbuy 20x27x1 MERV 11 Allergen Defense, Pleated HVAC AC Furnace Air Filters (5-Pack)
Customer ratings & reviews
How item rating is calculated
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |
Showing 1-3 of 32 reviews
Aug 30, 2025
anonymous
5 out of 5 stars review
Verified Purchase
Not sure if it will do much, but worth a try!
I think this will work for my purposes. Not sure if it will make that much difference, but since it was not expensive, worth a try.
Helpful?67AH10ZKECLD100776539
Mar 1, 2025
Tom
5 out of 5 stars review
Verified Purchase
Great furnace filter sealer
This product works as described. I was able to customize the two sheets to conform to my furnace. After completing the modifications, it tightly sealed the filter opening.
Helpful?67AH10ZKECLD100776539
Jan 2, 2026
Rao
5 out of 5 stars review
Verified Purchase
Very easy to install and should help reduce dust ingress into the air circulation system.
Helpful?67AH10ZKECLD100776539
