Ductwork to nowhere
When I moved in, my house had a supply duct running to the garage. My best guess is that a previous owner wanted a conditioned garage and added it after the house was built. From reading this site, I know this is a bad idea, so I blocked it off at the register with some rigid foam blocking. The duct runs from the air handler in the basement, through a block wall into the crawlspace, and terminates at the garage, about 12-15 feet away.
Since this is now a duct to nowhere, it seems pointless to send air that way. Since it runs through an unconditioned crawl, that seems especially bad. Air pressure is low at supply registers farther from the air handler, so I’m wondering if this could help with that issue.
What effect would eliminating that stretch of ductwork have on the system overall? Any disadvantages to removing it?
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