Princeton is an old town with old housing to match, and that shapes almost every call we take here. A good part of the housing near the centre predates central heating entirely, which means chimneys built for wood that have since been fitted with gas inserts, sometimes twice over. Those retrofits are the ones worth looking at closely. An insert that went in during the eighties is a different animal from one fitted last year, and the parts that fail on it are different too.
Further out, toward the townships, the stock gets newer and the units get simpler. Direct vent built-ins, sealed systems, no chimney involved. Those tend to need less work, but they are also the ones people forget about entirely until the first properly cold night, because nothing about them asks for attention until they stop lighting.
Either way, the job usually starts the same. We look at what is actually installed rather than what the last owner said was installed, and go from there.