Garage air getting into the home can lead.
Hvac vents in garage.
Typically there will be two 2 12 inch louvered metal vents co located just above the sill plate and usually near the vehicle entry end of the garage.
From an efficiency standpoint the garage would be a better location than an unconditioned attic.
I have been searching for requirements for residential garage ventilation.
Here is my scenario.
Here is what the licensed contractor put in writing on the invoice.
No cars ever get parked in the garage.
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International residential code prohibits any ducts or vents opened to the garage space.
Hvac registers grilles vents.
Garage door openers.
An attached garage as shown at left.
The principle reason is that it provides an area where fire can freely pass from the garage space into the attic and then quickly travel across the home over sleeping areas.
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The problem here is health and safety.
I ve written about how bad it is to put your heating and cooling system in an unconditioned attic especially in a cooling climate.
We have made a play area in the garage for the kids.
Recently inspected a townhome with drive under garage and finished basement.
I stated the normal safety concerns and recommended a licensed hvac contractor inspect and correct as needed.
System is working properly at this time.
As i understand this is required due to combustible storage such as paints thinners gasoline as well as the potential car running with vehicle door closed not.
I figured that the vents will mainly be opened on the weekends and sometimes in the evenings.