Skip to main content
PetLawn & GardenTruck & AutomotiveClothingPoultryHeating & CoolingHorseSporting GoodsOutdoor Power EquipmentFencing & GatesLivestockOutdoor LivingPet & Animal PharmacyToolsHome ImprovementFarm & RanchBoots & ShoesTrailers & TowingHome Decor & FurnitureWild Birds & WildlifeToysGift CardsServices Propane RefillTrailer RentalGarden CenterFeed CenterSame Day DeliveryPetVet ClinicPet WashGrooming at PetsenseDog Training at PetsenseTractor Supply RxPet InsuranceWag!

"Savings and Offers"

Weekly AdSaleClearance

"More Options"

Weekly AdWhat's NewTractor Supply AppEarn Rewards with Neighbor's ClubHometown HeroesLife Out Here BlogTSC Exclusive BrandsTop BrandsClearance ItemsBattery FinderOutdoor Power Equipment Parts FinderHitch Finder

Spend $49.99 to unlock Free Delivery on most orders

|
Learn More
Order statusTSC Credit CardsWhat’s newPetsenseWeekly Ad
​

Sign In / Enroll

Get rewarded!

​
Menu

Search

Home

Sign In

Cart
4.0
(3)
4.0 out of 5 stars. 3 reviews
A woman outside with a dog
A woman outside with a dog
  1. Home
  2. /
  3. Heating & Cooling
  4. /
  5. Cooling Parts & Accessories
  6. /
  7. Cooling Covers
  8. /

  9. Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill

  1. Home
  2. /
  4. /
  5. Cooling Covers

Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill

Shop all Maxx Air

  • Limited Time Deal

  • Online Only

Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill

Item # 1378178

Maxx Air Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill
Maxx Air Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill
$50.99

Sale

Was$64.99

Save $14.00

Notice:
This Item cannot be shipped to AK, HI.
Get everything you need
Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill
4.0(3)

Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill

$50

.99

$64.99

Save (21%)

Maxx Air 18 in. Heavy-Duty Exhaust Fan with Integrated Automatic Shutter, 3,000 CFM
4.4(38)

Maxx Air 18 in. Heavy-Duty Exhaust Fan with Integrated Automatic Shutter, 3,000 CFM

$249

.99

Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Shop all Maxx Air

  • Limited Time Deal

  • Online Only

Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill

Item # 1378178

Maxx Air Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill
Maxx Air Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill

$50.99

Sale

Was$64.99

Save $14.00

financeCard Logo
New Cardmembers earn a $20 Reward‡ with qualifying purchase of $20 or more plus earn 5% in Rewards+ on this purchase. Valid through 8/9/26.

This item is available online only

Delivery to

Free standard delivery on online footwear & Clothing purchases of $49 and over.

​
Notice:
This Item cannot be shipped to AK, HI.
Get everything you need
Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill
4.0(3)

Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill

$50

.99

$64.99

Save (21%)

Maxx Air 18 in. Heavy-Duty Exhaust Fan with Integrated Automatic Shutter, 3,000 CFM
4.4(38)

Maxx Air 18 in. Heavy-Duty Exhaust Fan with Integrated Automatic Shutter, 3,000 CFM

$249

.99

Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Add the Maxx Air automatic shutter to finish your install of Standard and Premium series Gable Mount Ventilators if you are not installing behind existing louvers. Each aluminum louver is individually padded with felt for an extremely quiet operation. No special tools are required for installation and the frame has pre-punched holes to secure it in your attic space with zero hassle. This shutter unit automatically opens and closes when the fan turns on and off and helps to shield your attic space from the elements when the fan is not in use.Manufacturer Warranty covers parts only and does not cover whole units, labor, or returned shipping. Manufacturer Warranty covers manufacture defects and does not cover any damages or defects due to personal harm or misuse.

For additional information on this product, please see the Product Documents section for all downloadable user manuals, installation guides, brochures and warranty statements.

  • Fully automatic louvers open and close when ventilator is operating
  • Recessed or flushed installation
  • Impact-resistant aluminum louvers and galvanized steel frame
  • Gable mount automatic shutter comes pre-assembled for easy install
  • Automatic Gable Shutter Rough Opening: 18 in. x 18 in.
  • Physical Dimensions: 22 in. x 22 in. x 3 in.
BrandMaxx Air
Country of OriginImported
Care InstructionsNone
CompatibilityCool Attic, Maxx Air, Ventamatic brand gable mount ventilators
Indoor/OutdoorIndoor and Outdoor
Package Quantity1
Primary ColorGray
Primary MaterialAluminum
Product Height22 in.
Product Length3 in.
Product Weight5.7 lb.
Product Width22 in.
ShapeSquare
Warranty2 Year Limited
Manufacturer Part NumberCX2121AM

Have a question?
Start typing your question and we'll check if it was already asked and answered.
1 - 4 of 4 Questions
Sort by
Newest questions

Q: Can this be customized size wise?

9 months ago
1 Answer
  • A: Hi James! No. The size cannot be modified or customized. Automatic Gable Shutter Rough Opening: 18 in. x 18 in. Physical Dimensions: 22 in. x 22 in. x 3 in.
    9 months ago
    Helpful?

Q: Can this be used as a fresh air intake shutter for greenhouse when placed opposite an exhaust fan?

10 months ago
1 Answer
  • A: Hi Neighbor! This product is designed to be used with a gable-mount fan and functions as a part of the fresh air intake or exhaust system, automatically opening when the fan runs to allow air to pass through.
    10 months ago
    Helpful?

Q: What cfm does this fan producè?

a year ago
1 Answer
  • A: Hi Neighbor! The Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill, can produce up to 3,000 CFM (Cubic Feet per Minute) of airflow.
    a year ago
    Helpful?

Q: Is this fan capable of pulling paint overspray from a 24 x 30 foot building for painting vehicles?

a year ago
1 Answer
  • A: Hi Gary, This product may be returned within 30 days(90 Days for Neighbors Club Members) of the purchase if you are not satisfied or need to get a different style, or size.
    a year ago
    Helpful?

Q&As

Have a question?
Start typing your question and we'll check if it was already asked and answered.
1 - 4 of 4 Questions
Sort by
Newest questions

Q: Can this be customized size wise?

9 months ago
1 Answer
  • A: Hi James! No. The size cannot be modified or customized. Automatic Gable Shutter Rough Opening: 18 in. x 18 in. Physical Dimensions: 22 in. x 22 in. x 3 in.
    9 months ago
    Helpful?

Q: Can this be used as a fresh air intake shutter for greenhouse when placed opposite an exhaust fan?

10 months ago
1 Answer
  • A: Hi Neighbor! This product is designed to be used with a gable-mount fan and functions as a part of the fresh air intake or exhaust system, automatically opening when the fan runs to allow air to pass through.
    10 months ago
    Helpful?

Q: What cfm does this fan producè?

a year ago
1 Answer
  • A: Hi Neighbor! The Maxx Air 18 in. Automatic Metal Shutter for Gable-Mount Power Attic Ventilators, Mill, can produce up to 3,000 CFM (Cubic Feet per Minute) of airflow.
    a year ago
    Helpful?

Q: Is this fan capable of pulling paint overspray from a 24 x 30 foot building for painting vehicles?

a year ago
1 Answer
  • A: Hi Gary, This product may be returned within 30 days(90 Days for Neighbors Club Members) of the purchase if you are not satisfied or need to get a different style, or size.
    a year ago
    Helpful?

Similar Items

  1. Top Rated
    Portacool Cyclone 160 Protective Cover
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Portacool Cyclone 160 Protective Cover

    $69.99
  2. Top Rated
    Portacool Cyclone 110 Protective Cover
    5.0 out of 5 stars with 3 reviews
    5.0 (3)

    Portacool Cyclone 110 Protective Cover

    $39.99
  3. Top Rated
    Portacool Cyclone 140 Protective Cover
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Portacool Cyclone 140 Protective Cover

    $69.99
  4. Classic Accessories Evaporative Cooler Cover Straps, Black
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Classic Accessories Evaporative Cooler Cover Straps, Black

    $9.99
  5. Top Rated
    Classic Accessories Evaporative Cooler Cover Heat Plug, Model 0, Grey
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    Classic Accessories Evaporative Cooler Cover Heat Plug, Model 0, Grey
  6. M-D Building Products Air Conditioner Cover, Round
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    M-D Building Products Air Conditioner Cover, Round

    $32.99
  7. Modern Leisure Chalet Round Air Conditioner Cover, 34 in. Diameter x 30 in., Beige
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Modern Leisure Chalet Round Air Conditioner Cover, 34 in. Diameter x 30 in., Beige

    $44.99
  8. Hessaire 17 x 9 x 7in. Evaporative Cooler Cover for 1,300 CFM Evap Coolers
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Hessaire 17 x 9 x 7in. Evaporative Cooler Cover for 1,300 CFM Evap Coolers

    $37.99
  9. Hessaire 38 x 17in. Evaporative Cooler Cover for 3,100 CFM Evaporative Coolers
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Hessaire 38 x 17in. Evaporative Cooler Cover for 3,100 CFM Evaporative Coolers

    $47.99
  10. Hessaire 44.5 x 28in. Evaporative Cooler Cover for 5,300 CFM Evaporative Coolers
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Hessaire 44.5 x 28in. Evaporative Cooler Cover for 5,300 CFM Evaporative Coolers

    $44.99
  11. Top Rated
    M-D Building Products Medium Silver Air Conditioning Cover for Window Units
    5.0 out of 5 stars with 1 reviews
    5.0 (1)

    M-D Building Products Medium Silver Air Conditioning Cover for Window Units

    $10.49
  12. J&D Manufacturing Weather Hood with Korad, Fits 13-1/2 in. x 44-1/2 in. Round, Hips, Black, VFTP1344B
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    J&D Manufacturing Weather Hood with Korad, Fits 13-1/2 in. x 44-1/2 in. Round, Hips, Black, VFTP1344B

    $109.99

Items You May Like

  1. Lambro 6-in. White Plastic Fresh Air Intake Vent with Rain Guard and Removable Screen, White
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Lambro 6-in. White Plastic Fresh Air Intake Vent with Rain Guard and Removable Screen, White

    $16.19
    Was $17.99Save $1.80
  2. Top Rated
    Maxx Air Leg Extension Kit for Maxx Air 24 in. Direct Drive Drum Fans
    5.0 out of 5 stars with 3 reviews
    5.0 (3)

    Maxx Air Leg Extension Kit for 24 in. Direct Drive Drum Fans

    $15.99
  3. Frost King Premium Indoor/Outdoor Window Film Insulation Kit for 1 Extra-Large Window or 5 Standard Windows
    4.3 out of 5 stars with 27 reviews
    4.3 (27)

    Frost King Premium Indoor/Outdoor Window Film Insulation Kit for 1 Extra-Large Window or 5 Standard Windows

    $16.99
  4. Lambro 4 in. White Plastic Fresh Air Intake Vent with Mini Louvers, Removable Screen, and 3 in. Aluminum Pipe, White
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Lambro 4 in. White Plastic Fresh Air Intake Vent with Mini Louvers, Removable Screen, and 3 in. Aluminum Pipe, White

    $13.49
    Was $14.99Save $1.50
  5. Top Rated
    Schaefer 36 in. Steel Ceiling Fan Mount, 75 lb. Max Weight, 760 sq. ft. Recommended Room Size
    5.0 out of 5 stars with 3 reviews
    5.0 (3)

    Schaefer 36 in. Steel Ceiling Fan Mount, 75 lb. Max Weight, 760 sq. ft. Recommended Room Size

    $19.99
  6. Lambro 6-in. White Plastic Fresh Air Intake Vent with Mini Louvers and Removable Screen, White
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Lambro 6-in. White Plastic Fresh Air Intake Vent with Mini Louvers and Removable Screen, White

    $14.39
    Was $15.99Save $1.60
  7. Frost King Rubber Foam Self-Stick Weather Seal, Black, 7/16 in. x 3/4 in. x 10 ft., Fits Gaps Between 9/16 and 1/4 in.
    4.7 out of 5 stars with 3 reviews
    4.7 (3)

    Frost King Rubber Foam Self-Stick Weather Seal, Black, 7/16 in. x 3/4 in. x 10 ft., Fits Gaps Between 9/16 and 1/4 in.

    $6.99
  8. Hessaire Submersible Water Pump Replacement for 1,300 CFM Evaporative Coolers
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Hessaire Submersible Water Pump Replacement for 1,300 CFM Evaporative Coolers

    $24.99
  9. Portacool 3 in. Caster Kit
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Portacool 3 in. Caster Kit

    $69.99
  10. Crescent 6 in. Insulation Knife
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Crescent 6 in. Insulation Knife

    $13.49
    Was $14.99Save $1.50
  11. Portacool Cyclone Caster Kit
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Portacool Cyclone Caster Kit

    $49.99
  12. Jan Fan Replacement Blade, 24 in.
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Jan Fan Replacement Blade, 24 in.

    $74.99

Reviews

Rating Snapshot

Select a row below to filter reviews.

5 starsstars

2
2 reviews with 5 stars.

4 starsstars

0
0 reviews with 4 stars.

3 starsstars

0
0 reviews with 3 stars.

2 starsstars

1
1 review with 2 stars.

1 starstars

0
0 reviews with 1 star.

Overall Rating

4.0
0 out of 1 (0%) reviewers recommend this product

Review this Product

Select to rate the item with 1 star. This action will open submission form.
Select to rate the item with 2 stars. This action will open submission form.
Select to rate the item with 3 stars. This action will open submission form.
Select to rate the item with 4 stars. This action will open submission form.
Select to rate the item with 5 stars. This action will open submission form.
Adding a review will require a valid email for verification
  • sturdy
1 to 1 of 3 Reviews .
1 – 1 of 3 Reviews
Sort by
Most Recent
WV
Review 1
2 out of 5 stars.

NOT STURDY

10 months ago
DELIVERED WITH BROKENFIN HELD BY PLASTIC TABS

No, I do not recommend this product.

2 Ratings-Only Reviews

Get the top deals, latest trends and more
Sign up for emails from Tractor Supply today.
First Name*
Last Name*
Email*

Customer Support

  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  

    (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

About Us

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

Work With Us

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

Neighbor's Club

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

Credit Center

  • TSC Credit Card

  • Klarna

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More
  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

  • TSC Credit Card

  • Klarna

Connect & Share with the Tractor Supply Community.

Shop on the go with the Tractor Supply App

Learn More
  • Privacy policy
  • Your Privacy Choices
  • Terms and Conditions
  • California Transparency Act
  • Legal Notices
  • Accessibility
  • Responsible Disclosure Statement
  • Surprise (Balance) Medical Billing Disclosure
  • Transparency in Coverage
  • Human Rights Policy
  • Vendor Code of Conduct
  • California Notice of Collection
  • Privacy Requests

© 2026, Tractor Supply Co. All Rights Reserved.