Quote:
Originally Posted by Denvercane
I really doubt you got a 10 drop. Ask anybody but a vent salesman and they will tell you. The vents are too small CFM wise to provide any real help. A gable fan is the only real option if your roof has gables. The rest of that vent stuff is just fluff and a waste of money.
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The average two car garage at The Villages has a volume of about 5,000 cubic feet, I think. If you have a couple vents in the garage door and a solar ceiling fan that sucks out 100 cubic feet per minute, you can theoretically replace the air in your garage every fifty minutes, if things work right. That’s not going to make too much difference. If you have one of those high-power garage ceiling fans that suck out 1,250 cubic feet per minute, you can replace the air in four minutes. But those fans make a lot of noise and use a lot of electricity. If you have them on all day, they can provide a nice breeze, and they can lower the temperature to approximately the outdoor temperature in the shade. Still, if you drive your hot car from a parking lot into your garage, it will get very hot in there, as that car is a bit like a big wood stove, so far as heating a room goes.
For the coolest garage without air conditioning it, leave the garage door open all night, using only the door screen, so the garage can cool down to 60° to 70°. If your door faces East, close it when the sun no longer hits it. If it faces other directions, close it at first light. If you take your car out, park it in your driveway until dark. If the door faces west, open the door and just use the screen when the sun hits the door. A concrete slab that has cooled down to closer to outdoor night time temperature can help keep the garage cool. With a bit of effort, you could have a garage somewhat cooler than outdoor daytime temps. This is assuming that you have lots of insulation in the attic over the garage. If you don’t, the best thing to do is simply to leave the garage door up all the time and just use the screen doors.