North Jersey
Member
I finally broke down and bought a direct vent tankless water heater to overcome the combustion problem I was facing with the standard power vent model I own. At any rate, I find myself in need of venting the heater under a 7' unenclosed entry porch. I'm looking for a national code reference that addresses clearance under a porch. I searched ANSI Z223.1/ NFPA 54, but I couldn't find anything. Canadian code requires 1' clearance from the porch and, I believe, two unenclosed sides. I'm looking for something that will convince my local inspector that this is an acceptable location for the termination.