I just received a new ribbon burner. It's a voltarc-hyde 16". My question is about the economizer. It has the gas and air intakes on the bottom but on the side there is a 1/4" fitting with a valve. What is that for? I thought I "heard" Ted mention something about an oxygen boost. If that is what it is for can you give a little detail about how it's hooked up and used. Thanks in advance.