Optional · 1 of 3
Tickets that raise your rate
Plumber licence
The classic pairing. Water heaters, boilers and gas lines in one visit.
HVAC (heating, ventilation and air conditioning) licence
Furnaces and rooftop units need both a gas licence and refrigeration skills.
Propane and oil burner certificates
Rural and cottage country runs on propane and oil. Fewer technicians means more work.
G1 or Class A
Large boilers, industrial burners and commercial kitchens. Fewer people hold it, so it pays more.