Hot Garage – Do Garage Door Vents Work

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My Garage gets hot in the summer!
Outside temp might be 85 degrees Fahrenheit but in the garage it's over 110.
If I leave the door open about 8 inches temperature equals out.

Issues with leaving the door open:

  • Bugs and critters
  • Security
  • Remembering to close it

I've been looking at garage door vents.
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Features:

  • Crank handles adjustable louvered vents (so I can close the vent in the winter)
  • Rodent / bug screen

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This seems like a good way to keep the door closed and have my ventilation too.

Having the door open allows a lot more air flow than these two vents.
Anyone have experience with these? Do they work?

Best Answer

I have found vents like the ones you have in the photo to be basically worthless. I have found that a powered temperature activated vent in the roof is almost as good as an air conditioner. The first one I installed was line voltage driven with a temp switch it was really a huge savings in that home, because it dropped the attic temp by 40-50 degrees, the next couple of homes I used solar powered vents, these were a little more up front unless a new circuit was needed and if a new circuit was needed the solar was cheaper. In short a passive ventilation system is limited to the area in square feet you have and the height between them. If I were you I would be looking into a powered vent on the roof, it will work much better in my opinion from actual experience with Louvered vents that were 3’ square compared to a single 8 or 10” powered exhaust that actually cooled the entire house.

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