Ask questions and get answers from experienced industry professionals
Roofing/ Gutter contractor
There are companies that offer energy evaluations and some even use thermal imaging and a tool / process called a blower door reading / test. This will help identify the cause and opportunities for correction. You can do some easy items as well like ensuring all like plate covers have insulated pads behind the covers, check for insulation around your homes perimeter if you have an unfinished basement, check your homes exterior for small gaps or holes left from old utilities and service work performed over the years. Best of luck!
Depends on the outside air temperture realative to the temperature in your garage - your going to be pulling in outside air & pushing out the inside air - the only time youll get cooling is if ouside temp is less than inside yemp....
The addition of a ceiling fan will not actually reduce the temperature, however the increased air flow will make you feel more comfortable.