I probably should have stated that I want to make sure I know how much air I need to make sure I have when I add a fan/blower. I want to make sure that I have more than enough air for a given PSI based on the current burner.
I could be overthinking it, but I am thinking that if I know the volume of propane, I can calculate the minimum air required for combustion and then increase from there. I don't want to add a blower (my estimate is using a hair dryer at this moment) and find out that I have to little air available to the forge.