Replacing Gas Hot Water with a Heat Pump – Costs, Tips & Plumbers Advice
Replacing a gas hot water system (like a califont) with a hot water heat pump is becoming increasingly popular in New Zealand. Rising gas prices, sustainability goals, and government initiatives are encouraging homeowners to make the switch. But what does it cost to install a hot water heat pump, and what factors affect the price? While every home is different, we’ve spoken to a few plumbers to get a general idea.
“While the cost to replace a gas califont with a hot water heat pump can vary depending on a homeowner’s set-up, we’re installing All-in-One heat pumps from $7,400 including GST” says Iain from Renewable Energy Ltd. “Every property is different, so a site check is the best way to get an accurate figure.”
Existing plumbing setup – If your home’s layout makes it easy to connect a heat pump to your water system, installation can be quicker and cheaper.
Electrical requirements – Some homes may need additional wiring or an upgraded switchboard.
Unit location – The closer the outdoor unit can be to your water cylinder, the more efficient and cost-effective the installation can be.
Access and site preparation – Tight spaces, steep sections, or concrete cutting can add to costs.
“An external gas califont is generally the quickest and easiest to replace with a heat pump. Because water connections and power are already right there on the outside of your home,” says Paul from Pipe Masters. “Indoor electric cylinders or gas water heaters can be a bit trickier but anything is possible and we can (almost) always find a way to make a heat pump system work in your home.”
Every $1 spent on electricity = $3 to $5 hot water value in your cylinder
At least 60% more efficient than an electric cylinder or gas califont
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Reduce your environmental impact and carbon footprint
“Our customers are absolutely stoked with the Apricus Eco hot water heat pump systems they have installed with savings exceeding their expectations,” says Roger from Hydro Gas & Heating. “One customer is a council building consent officer and he’s recommending hot water heat pumps to all his friends and even some clients! He’s only paying about $10 a week for hot water now.”
While the upfront cost of installing a hot water heat pump will be higher than a gas califont or electric cylinder, the long-term savings and efficiency benefits make it a smart investment for most homeowners. The best way to know your exact cost is to get a quote from a qualified plumber who can assess your specific set-up.
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Please Note: Figures in our posts are subject to change over time. While we do our best to keep information up to date, all figures were accurate at the time of publication, which for this article was:
