A gas fitter is a tradesperson certified to install, alter, and service natural gas and propane piping and appliances. In British Columbia, gas fitters are certified through Technical Safety BC: Class B covers appliances up to a set input limit, typical of homes and light commercial buildings, while Class A has no input limit.
Why it matters to you
In BC, furnace, boiler, gas water heater, and gas fireplace installations must be done by a certified gas fitter, usually under a gas permit with inspection. Unpermitted gas work can affect your home insurance and complicate a sale.
Practical guidance
Before any gas work starts, ask for the gas fitter's certificate number and confirm the contractor is pulling the gas permit. Be wary of anyone who suggests skipping the permit to save money.