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Originally Posted by donsnider52@gmail.com
I am considering putting a vent in the right and left lower corners of my garage door to reduce heat in the garage especially during the summer months. Will doing this really substantially reduce heat build up in the garage. For example, if the air temp is 95 will the vents keep the garage below 100 degrees. I have good venting in the roof and I plan to keep the retractable stairs to the garage attic down during the summer. Please let me know if you have experience with this.
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You might consider installing radiant barrier insulation on the garage door. I did this on our garage door. Radiant barrier insulation is now code for roofs in Sumter County. It works by reflecting heat back out. If you get sunlight on your garage door in the afternoon, this would likely reduce your temperature in your garage. I did this in mine as I have 2 full size freezers with a maximum temperature rating of 110F. My goal was to keep the garage under 95F. Since installing the radiant barrier insulation, my garage has never reached the 95F mark. I have a thermometer in the garage that keeps track of maximum and minimum temperature as well as maximum and minimum humidity.