So what I'm looking for is some boiler-plate comprehensive enough so that the inspection will cover the system from the union on the gas line to the vent's connection to the chimney, written in "HAVC-techease" so that it's clear what I'm recommending, and in a style that more likely to elicit cooperation than annoyance.

So I'm wondering, if you were trying to explain to a HVAC tech just starting on the job what such an inspection should include, how would you put it?