Change of system
Gas to Electric Hot Water Conversions
More New Zealand households are reviewing whether gas still suits their hot-water needs — particularly where bottled LPG costs are rising, where a califont is at end of life, or where the home is being upgraded for long-term efficiency.
At a glance
Gas to Electric Hot Water — key points
- Califont to electric cylinder conversions
- Califont to heat pump hot water
- LPG and natural gas properties
- Electrical capacity assessment required
- Decommissioning of gas appliances
- Independent professional assessment
What a conversion involves
A conversion replaces the gas water heater with an electric system — typically a mains-pressure electric cylinder or a heat pump water heater — and involves both plumbing and electrical work.
The scope usually covers removing or decommissioning the gas appliance, installing and locating the new system, adapting pipework and valves, and confirming the switchboard and circuit capacity are suitable.
Weighing up the options
Electric cylinders are typically the lower up-front option and are simple and well understood. Heat pump hot water usually costs more to install but uses significantly less electricity for the same hot water.
We deliberately avoid universal claims about which system is best. Household size, usage patterns, energy pricing, available space and installation complexity all change the answer.
- Up-front installation cost versus ongoing running cost
- Space available inside and outside the property
- Existing electrical supply and switchboard capacity
- Whether gas is used elsewhere in the home (cooking, heating)
- Household hot-water demand and peak usage
- How long you plan to stay in the property
Getting a professional assessment
Because conversions touch regulated plumbing, gasfitting and electrical work, they need to be assessed and carried out by appropriately qualified professionals.
Request a quote and your enquiry can be passed to a suitable independent provider in your area who can assess the property and explain what a conversion would involve.
Questions
Frequently asked questions
Is electric hot water cheaper than gas in NZ?
It depends on your energy tariffs, whether you are on bottled LPG or reticulated natural gas, the efficiency of the system installed, and how much hot water your household uses. Comparison should be done on your actual usage, not on general claims.
Do I need to remove my gas connection?
Not necessarily. Many homes keep gas for cooking or space heating and convert only the hot water. A qualified gasfitter can advise on safe decommissioning of the appliance.
Ready to upgrade your hot water?
Tell us what you need and we'll connect you with a suitable independent hot-water professional in your area.
No obligation. Free to request. Your details may be shared with a suitable independent provider so they can respond.