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Master Flow
Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover

Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover

4.8· 4 ratings

Best price now

$14.37at Max WarehouseVerified

Compared across 5 stores. Prices are checked against each store and labelled with when.

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Our take on the Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover

A two-pack of mill-finish aluminum covers that snap over standard 16 in. x 8 in. crawl space foundation vents. Each cover has a spring-loaded flap that closes the vent in cold weather to cut frozen pipe risk, and a screen that keeps out leaves, insects and rodents while still allowing air circulation. Aluminum resists rust, unlike steel covers. At $14.37 for two at Max Warehouse as of November 4, 2026, it sits at the low end of its recent range, and five stores carry it new.

Best forCrawl space owners in cold climatesSealing 16 in. x 8 in. foundation ventsHomeowners replacing rusted steel coversWinterizing a house before the first freeze
Pros
  • Aluminum resists rust and corrosion
  • Spring-loaded flap closes automatically in cold weather
  • Screen blocks insects and small rodents
  • Snap-on mounting over most 16 in. x 8 in. vents
  • Two covers and springs per pack for about $7 each
Cons
  • Not paintable or stainable, so the mill finish stays bare
  • Some installs need the hook hole enlarged
  • Reported hook breakage when closing the flap
  • Only fits 16 in. x 8 in. vents

Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover prices at every store

  • Max WarehouseNew

    In stockReturn policy

    $14.37Verified
    Visit store
  • Mrosupreme.comNew

    In stockReturn policy

    $14.41Observed at 3:09 PM
    Visit store
  • WareRiseNew

    In stockReturn policy

    $17.99Observed at 3:09 PM
    Visit store
  • The Home DepotNew

    Availability unknown

    $14.60Observed at 3:09 PM
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  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $22.63Free shippingObserved at 3:09 PM
    Visit store

Also available at

  • Factory Hardware StoreCheck price at Factory Hardware Store
  • Manny's Hardware LLCCheck price at Manny's Hardware LLC
  • SupremeDIYCheck price at SupremeDIY

Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover price history

Lowest price we've seen: $14.60 on Nov 4 at The Home Depot. Tracked across 2 stores since Nov 4.

What reviewers say

Rated 4.8 out of 5 from 4 ratings. Owners call it easy to install and say it solved a crawl space problem at a lower price than other sites.

Pros
  • Easy to install
  • High quality and exactly what was needed
  • Solved a crawl space problem
  • Cheaper than other sites
Cons
  • Installation required enlarging the hole the hook goes through
  • The hook broke when trying to close it

From Max Warehouse

  • Aluminum foundation vent cover shields vent openings to help reduce frozen pipe risk in crawl spaces
  • Helps with insulation issues and moisture control by keeping out debris such as leaves and rodents
  • Aluminum construction resists rust and corrosion
  • Easy to mount over most 16 in. x 8 in. foundation vents
  • Allows proper air circulation while blocking insects and small rodents
  • Mill finish; not paintable or stainable
Materials
Aluminum with a mill finish
Fit
Fits standard 16 in. x 8 in. foundation vent openings; product measures 7.4 in. H x 15.4 in. W x 0.25 in. D
Sizing
Measure your vent openings before purchasing to ensure a proper fit
Care
Periodically check and clean the vent cover to keep it free of debris and functioning properly
Returns
Easy 30-day returns on applicable orders; see the Return Policy for details
Shipping
This item qualifies for free shipping once your order subtotal reaches the threshold; standard shipping is 3-5 business days
Packs
One package contains 2 covers and 2 springs; bulk quantity discounts available at 7+, 10+ and 15+ units
In the box
2 covers, 2 springs

About the Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover

The Master Flow Foundation Vent Cover is an essential vent opening shield to protect your home by reducing frozen pipes' risk in your crawl space. The crawl space vent cover will also help with insulation issues and moisture control by deterring debris' entry, such as leaves and rodents, into your crawl space. Made from aluminum, these foundation vent covers eliminate rust. They are easy to mount over most 16 inch x 8 inch foundation vents. One package contains 2 covers and 2 springs.

• UPC: 050206162002

• Manufacturer Part No: FVC168

• Brand Name: Master Flow

• Height: 7.4 in.

• Width: 15.4 in.

• Color: Mill

• Product Type: Foundation Vent Cover

• Material: Aluminum

• Shape: Rectangle

• Paintable or Stainable: No

• Vent Type: Static

• Depth: 0.25 in.

• California residents see

Prop 65 WARNINGS

What buyers say

Buyers like
  • Easy to install
  • High quality and exactly what was needed
  • Solved a crawl space problem
  • Much cheaper than other sites
  • Large quantity available in one order
Buyers complain about
  • Installation required enlarging the hole the hook goes through
  • The hook broke when trying to close it

Specifications

Type
Automatic Foundation Vent
Vent Type
Foundation vent
Airflow Volume
57 sq. in. (net free vent area)
Depth
11.13 cm
Dimensions
17.5 in x 9.25 in (actual)
Height
8 in
Length
9.25 in
Width

Questions and answers

Will these fit my foundation vents?
They fit vents measuring 16 in. x 8 in. The cover itself measures about 15.4 in. wide by 7.4 in. high, so measure your opening before ordering.
Do they close automatically?
Yes. A spring-loaded flap closes the vent as temperatures drop, which helps keep cold air out of the crawl space. You can also open and close them by hand.
Are they better than plastic vent covers?
Aluminum will not crack or rust like steel, and it holds up to weather better than most plastic covers. The trade-off is that the mill finish cannot be painted to match your foundation.
What comes in the box?
Two aluminum covers and two springs. Mounting hardware and a screen are included.
When is the price lowest?
Crawl space vent covers sell best in fall, so prices tend to firm up around the first freeze. The current $14.37 for two at Max Warehouse is already near the low end of its recent range.
Where is the Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover cheapest?
At Max Warehouse, for $14.37, as of our latest check.
What do buyers say about the Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover?
Rated 4.8 out of 5 from 4 ratings. Buyers like: Easy to install; High quality and exactly what was needed; Solved a crawl space problem. Common complaints: Installation required enlarging the hole the hook goes through; The hook broke when trying to close it.
Where can I buy the Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover?
8 stores we checked sell it, including Max Warehouse, The Home Depot, Amazon, Mrosupreme.com, WareRise.

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Buying guides that pick the Master Flow 7.4 in. H X 15.4 in. W Mill Aluminum Foundation Vent Cover

  • Best insulated crawl space vent covers
16 in
Material
Resin
Power Source
Non-Powered
Typical Rooms
Crawl space
Typical Environment
Homes with a foundation
Intended Use
Ventilation
Application
Foundation
Use
Ventilation
Installation Location
Foundation
Installation Type
Snap-in installation
Installation Highlights
Snap-in installation
Mounting Hardware Included
Yes
Control Type
Automatic
Filter Included
Yes
Included Accessories
Screen
Heat Sentry
Yes
Fits vent size
16" x 8" (406 mm x 203 mm)Source