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So I bought this manometer from Amazon. It's called a tube in tube manometer. It was cheap. I wish I would of bought something better but this is what I have. So my buddy and I are arguing on how to use it. So I fill it to zero then adjust my pressure or so I get my specified pressure and be at...

First off. Thank you for letting me join the site. Awesome place. So I have a garage that's 40x32. It also has 11 foot ceilings. I will be insulated in a few weeks. My current setup is an old modine that is rated at 150k btu... Now back two or three years ago the gas here was free. But the...