re: OT plumbers, contractors, and men who use tool belts. Water heater vent question

Not quite what you are asking but you say you have a house from the 80's. How old is your water heater? I live in the spring area and our house is 20 years old, single story, 3 br 2 ba with the water heater in the attic. I just replaced it (40 gal natural gas) and it cost $925. there was no problem, I felt it was time to replace it while I could afford to do that.

You may want to check your water heater's age. Imagine all the fun you will have replacing a ceiling due to a water leak and discovering just how good/bad your homeowners insurance is