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    Master Flow   16 in. x 8 in. Automatic Open/Close Foundation Vent in Black

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    • Description
      • Automatic Foundation Vent
      • Temperature controls dampers
      • Replaces manual vent
      Store SKU:

      The Master Flow 16 in. x 8 in. Resin Automatic Foundation Vent in Black helps to reduce moisture and helps prevent decay in your foundation with a net free vent area of 57 sq. in. The vanes are factory set to automatically open fully at 70°F and close fully at 40°F. The UV resistant resin constructed unit easily slips into place and is held in place by tightening the 4 screws in the face of the unit.

      • Black resin construction
      • Automatically opens and closed according to the outside temperature
      • Easy installation
      • Screen included
      • UV resistant
      • Common: 16 in. x 8 in.; actual: 17.5 in. x 9.25 in.
    • Specifications
      Color Family :
      Cut-Out Left to Right Length (in.) :
      Material :
      Net-Free Area (Sq. In.) :
      Paintable/Stainable :
      Product Depth (in.) :
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      Screen Included :
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      UV Resistant :
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    • Reviews

      Ratings & Reviews

      40% of customers recommend this product
      Out of 5:
      Customer Images (1)
      • Excellent Product
      • October 22, 2015
      • Recommended Product

      The negative reviews don't seem to understand how you adjust the vent. The vent operates using a metal spring that expands and contracts with temperature. It should be fully open at 70 degrees and fully closed at 40. The way you check this is by putting the vent in the refrigerator, making sure it is in the same position as you'll install it (top side up, standing up). After half and hour or so, the vent should be closed. If it's not, use a screwdriver to adjust the spring - you'll see a plastic notch on the side with the metal cover. It only takes half a turn or so one way or the other, and the grates will spring shut when you hit it right. Test each one and you'll have no problems. I used these to replace the old metal grates on my house. I took the extra step of getting some 1/2 in. foam insulation board and cutting it to fit around the body of the vent, mainly to take up the extra space between the opening in the wall and the vent itself and keep it centered (so I had the vent boxed in with foam board on all sides). I put down a stripe of expanding foam insulation around the opening to seal any cracks and slid it in. This keeps the vent secure and tight in the hole without having to rely solely on the screws. A nice bead of silicone caulking around it to keep water out to finish it off. The days after I installed them were well below freezing at night, and these vents works flawlessly. It made a tremendous difference in the temperature of the floor and kept the house much more comfortable. Take the time to adjust the vent if it needs it and use care when installing it and you'll have no problems.

      Pros Easy to Use, High Quality, Easy to Install, Nice Design
      • DIY


      Conover, NC
      25 to 34, Male
      23 out of 23 people found this helpful
      more details...
      By: Joao
    • Shipping & Delivery Options

      Store Exclusive. This item is available for purchase in select stores only.


      Express Delivery from Store is available for items currently in stock at a The Home Depot store within a delivery ZIP code. A driver from a local store will deliver the item(s).

      Outside Delivery:  Service includes delivery to area outside the house which is accessible by delivery equipment.

      Threshold Delivery: Service includes delivery across your first doorway or threshold (ie. garage, backyard, deck, first room of the home).

    This item cannot be shipped to the following state(s): AK,GU,HI,PR,VI

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