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Gas califonts give endless hot water, but they're not a DIY job — installation is tightly regulated for safety. Here's what the NZ rules cover, the clearances that matter, and why it has to be a registered gasfitter.
Published 2026-06-01 · Cambridge Plumbers
By law, gas work in New Zealand must be carried out by a registered gasfitter and certified. A califont install isn't just hanging a box on the wall — it involves the gas supply, flueing, ventilation and a Gas Safety Certificate. Getting it wrong risks carbon monoxide, gas leaks and an install that won't pass.
Califonts need correct clearances from windows, doors, vents and eaves so exhaust gases disperse safely and can't be drawn back inside. Indoor units need proper flueing; outdoor units (the most common here) still need clear space around the unit and away from openings. The exact distances come from the manufacturer's specs and NZ standards — which is exactly what a gasfitter checks before siting the unit.
A gas appliance burning indoors needs adequate air for combustion and a compliant flue to take exhaust outside. Most modern Cambridge installs use external continuous-flow units to keep this simple, but either way it has to meet standard — this is the part DIY jobs most often get dangerously wrong.
FAQ
No — gas califont installation legally must be done by a registered gasfitter and certified. It's a safety and insurance requirement, not just red tape.
Yes. Even outdoor units need clear space and distance from windows, doors and vents so exhaust can't be drawn back indoors.
Yes — a compliant install comes with a Gas Safety Certificate, which you may need for insurance or when selling the house.
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