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Hot Water Heat Pumps:
A Smarter Way to Heat Your Water
Reliable hot water for busy Kiwi households
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What is a hot water heat pump?
A hot water heat pump is an energy-efficient system that heats water by extracting heat from the surrounding air. It uses a refrigerant and a vapour compression cycle to transfer this heat into a water tank, even in cooler conditions. This method significantly reduces electricity use compared to traditional electric water heaters.
Hot water heat pumps use the same principle that make all heat pumps so energy-efficient: most of the heat energy they use comes from the ambient air, with only some being directly powered by electricity.
That means power savings of up to 79%! When you consider that most Kiwi homes spend around 30% of their power bills on hot water heating**, the savings can really add up.
Why choose a hot water heat pump?
First off, efficiency. Hot water heat pumps are way more efficient than old-fashioned hot water cylinders, so you can expect to save money on your power bill.
Next, they’re good for the planet. Everything we can do to reduce household energy use means less needs to be generated. Even in New Zealand, big part of our electricity generation comes from fossil fuels, so less is better!
Finally, think about home resale time. Imagine choosing between two homes, one with an old-fashioned hot water cylinder and the other with one that uses 70-79% less electricity. Which one would you choose?
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Hot Water Heat Pump Prices in NZ
The cost of a hot water heat pump depends on your home's size, hot water demand, and which system suits your existing plumbing and space, which is why HRV starts every quote with a free home assessment rather than a one-size-fits-all price list. As a guide, expect a hot water heat pump installation to cost more upfront than a like-for-like electric cylinder replacement, with the difference typically paid back over several years through lower running costs.
Types of Hot Water Heat Pump: Monoblock vs Split System
Integrated/Monoblock Hot Water Heat Pumps
A monoblock hot water heat pump combines the heat pump and hot water cylinder into one all-in-one outdoor unit. It's a straightforward like-for-like replacement for many existing electric hot water cylinders, with smart controls that let you schedule heating, monitor energy use, and take advantage of solar power or off-peak electricity rates.
Split System Hot Water Heat Pumps
A split system separates a compact outdoor heat pump unit from an indoor hot water cylinder, using heat pump technology rather than an electric element to heat the water. Split systems tend to suit homes replacing an existing indoor cylinder, and can offer faster reheating for larger households or periods of high demand.
Haier or Panasonic: Which Hot Water Heat Pump Is Right for You?
HRV installs hot water heat pump systems from two trusted manufacturers, Haier and Panasonic, and can help you choose based on your home, household size and budget during your free assessment.
Haier hot water heat pumps
Are available as a Monoblock (200L, 250L or 330L) or Split System (280L), with SmartHQ app control and up to 79% lower running costs than a standard electric cylinder.
Panasonic hot water heat pumps
Are built around a high-efficiency Monoblock design with a COP greater than 5.1 and a large 300L tank suited to bigger households.
Not sure which is right for you?
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We recently had a service on our HRV and the service we got was 1st class. He arrived on time, explained each step, showed us why the service was necessary and cleaned up afterwards.
Stuart S. (Auckland)
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FAQs
How much does a hot water heat pump cost in NZ?
Cost depends on your home's hot water demand, existing plumbing, and which brand and model suit your household, which is why HRV provides a free, no-obligation home assessment and a personalised quote rather than a fixed price list.
Can a hot water heat pump replace my existing hot water cylinder?
In most cases, yes. A monoblock hot water heat pump is designed as a like-for-like replacement for a standard electric hot water cylinder, and HRV's assessment will confirm whether a monoblock or split system suits your home's layout and plumbing.
How much can I save by switching to a hot water heat pump?
Depending on the model, a hot water heat pump can use up to 79% less electricity than a standard electric resistance water heater for the same hot water use.
Source: EECA / manufacturer AS/NZS4234 test data - see brand pages for model-specific figures.
Source: EECA / manufacturer AS/NZS4234 test data - see brand pages for model-specific figures.
Do hot water heat pumps work in cold New Zealand climates?
Yes. Both the Haier and Panasonic systems' HRV installs are rated to operate in ambient temperatures as low as -7C to -10C, which covers the great majority of New Zealand's climate zones. Your local HRV expert can confirm suitability for your specific location during your free assessment.
What's the difference between a Monoblock and a Split System hot water heat pump?
A monoblock combines the heat pump and cylinder into a single outdoor unit, making it a straightforward replacement for an existing electric cylinder. A split system separates the outdoor heat pump from an indoor cylinder, which can suit homes with specific space or plumbing constraints, or higher hot water demand. Your HRV assessment will recommend the right option for your home.
Ready to Upgrade Your Hot Water System?
Book a free, no-obligation home assessment and one of HRV's local experts will help you find the right hot water heat pump for your home.
Book a free home assessment