Econergy Heat Pump Hot Water Systems
Energy-efficient hot water solutions installed by Aqua Works, your local experts in smart, reliable water systems.
Econergy’s innovative heat pump hot water heaters
If you’re looking to reduce power bills while upgrading to a more efficient hot water system, Econergy heat pump water heaters are a proven, reliable option for New Zealand homes. Econergy is part of our full range of heat pump hot water systems.
At Aqua Works, we help you choose, supply, and install the right system, making sure it works perfectly with your home, your water supply, and your daily usage.
Why choose an Econergy Heat Pump System?
Econergy systems use advanced heat pump technology to heat your water using energy from the air. This way, it’s dramatically reducing electricity use compared to traditional cylinders.
Key Benefits:
- Up to 75% less energy to heat your water: Econergy’s tested figure for the HP4000LT is 73.8% in the North Island
- Runs on the heat pump down to about -5°C, without the electric element
- Connects to a new or existing hot water cylinder
- Made in Auckland, and each unit is tested before it leaves the factory
- Six-year performance guarantee (see the FAQs below)
Ideal for homeowners who want efficiency, reliability, and strong value for money.
Boost efficiency & savings with Econergy’s water heating solutions.
Is Econergy the right choice for your home?
Choosing the right system depends on your home, water setup, and how much hot water your household uses.
Econergy is a great fit if you:
Want to reduce your power bills
Are replacing an older electric hot water cylinder
Have a family home with regular hot water use
Want a reliable, cost-effective upgrade
Live on mains or tank water (common in Rodney)
You might also consider other options or compare heat pump systems to see what suits your home best.
You’re looking for premium features and top-end performance
You prefer a well-known legacy brand with a long track record
How a heat pump water heater works
Instead of generating heat directly, a heat pump:
- Draws warmth from the surrounding air
- Compresses it to increase temperature
- Transfers that heat into your water
This process uses significantly less electricity, which is why homeowners see noticeable savings.
Econergy system options
Econergy offers flexible systems to suit different homes:
- Integrated systems (all-in-one unit)
- Split systems (ideal for certain layouts or retrofits)
We’ll help you choose the right setup based on your space, usage, and installation requirements.
Not sure? We’ll recommend the best system for your home, not just a brand.
Econergy Systems we install and service
We supply and install a range of Econergy systems suited to different homes and usage needs.
Econergy THD3500
A 3 kW split heat pump that connects to a new or existing hot water cylinder, with a solar mode built in. It heats about 57 litres an hour, and Econergy says it can take up to 70% off your annual water heating energy. See the price in our shop
Thermoplus TH-260D1
An all-in-one heat pump water heater with 260 litres of storage, from Hot Water Heat Pumps Ltd, the company behind Econergy. It suits outdoor installation, runs quietly (48 dB) and uses a natural refrigerant. Warranty for a single family home: 6 years on the cylinder, 3 years parts and labour on the heat pump and 2 years on the electrics. See the price in our shop
Econergy HP4000LT
Econergy’s main heat pump water heater: 3.5 kW output, heats about 67 litres an hour and suits households of 2 to 8 people. It connects to a new or existing cylinder up to 9 metres away. Econergy’s tested figure is 73.8% annual energy savings in the North Island. See the price in our shop
Why choose Aqua Works to install & service your Econergy System?
A heat pump system is only as good as its installation.
At Aqua Works, we design and install systems that actually perform, taking into account your water supply, pressure, usage, and setup.
Based in Warkworth – we understand local homes and conditions
Specialists in water treatment, pumps & plumbing
Experience with rural tank systems and filtration integration
Friendly, respectful, and professional service
You’re not just getting a system. You’re getting the right solution. Call us on 0800 278 296 to get advice for your best option.
FAQs about Econergy Heat Pump Water Heaters
How much can I save with an Econergy heat pump water heater?
Econergy’s tested figure for the HP4000LT is 73.8% less energy a year than an electric hot water cylinder in Zone 5 (the North Island, except the Taupō area), and 71.1% in Zone 6, tested to AS/NZS 4234 and AS/NZS 5125. Your actual savings depend on how much hot water you use, your power prices and your current system.
What guarantee comes with an Econergy heat pump?
For a single family home, Econergy gives a six-year performance guarantee of at least 66% savings compared with a standard electric hot water cylinder, alongside a six-year parts warranty and three years’ labour. Both need the system installed and certified to Econergy’s installation manual, which we do. Commercial installations get two years.
The warranty doesn’t cover damage from hard or corrosive water, so we check your water first. See how your water affects your hot water cylinder.
Can an Econergy heat pump connect to my existing hot water cylinder?
Yes. The HP4000LT and THD3500 are split systems: the heat pump unit connects to your existing cylinder, or to an Econergy heat pump-ready cylinder, with insulated pipes and cables up to 9 metres apart. We check your cylinder is suitable first.
Does an Econergy heat pump work in winter?
Yes. Econergy rates the HP4000LT for air temperatures from -5°C to 40°C. It heats a little slower in colder air: Econergy’s figures show about 60 litres an hour at 12°C and about 75 litres an hour at 20°C. If the air stays below about -4°C, the electric element takes over so you still have hot water.
Can an Econergy system work with tank water or a rural supply?
Yes. The HP4000LT needs at least 50 kPa of water pressure (and no more than 1000 kPa). On tank water we make sure your pump and pressure suit, and that the water is balanced, because hard or corrosive water can damage the heat exchanger and isn’t covered by the warranty.
Talk to one of our plumbers on 0800 278 296 about your options.
Where are Econergy heat pumps made?
In Auckland, by Hot Water Heat Pumps Ltd in Henderson. Econergy says each unit is tested through several heating cycles before it leaves the factory.
How long does an Econergy heat pump installation take?
Most Econergy heat pump systems can be installed within one day, depending on where the cylinder is, any electrical or pipework changes, and access to the site.