In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Went to look at a job today. The building inspector wanted the boiler room to have a fireproof door, sheet rocked and the entire room sealed. I was giving a price to install a "air in a can" for combustion air when the inspector showed up.
He told me that I needed to install fresh air from outside for the boiler to burn, I told him I was installing the"air in a can". He then told me that I also needed the vents from outside both high and low (proper size of course). I then told him that the "air in the can" replaces the duct work. He then told me that it will not provide exhaust for the boiler room. I did not understand the that statement about the exhaust.
He told me thats why they want a high and low duct- one for intake for the boiler (combustion) and the second for boiler exhaust (room heat?) in which I disagreed.
Can anybody explain why you needed one high and one low duct for combustion air if done that way? I understand that you need x amount of square inches for btu input of the equipment. I just never wondered why two vents.