Heat Pump Water Heater Wellington
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Heat Pump Water Heater Installation and Maintainence
Heat Pump Hot Water Cylinders Wellington. Heat pump water heaters (HPWHs) are better than any standard electric cylinder. A heat pump water heater is usually installed outside the house, but can be installed inside too where noise is not an issue, and can absorb energy from the air.
We recommend systems for Wellington conditions and low noise models where required.
If you are looking for a cost-effective and energy-efficient method to heat water, then you can switch to a hot water heat pump. There are different kinds of hot water heat pumps available in the market. You can decide one that fits your needs and budget. Our team at Southern can recommend them to you as well. Getting a hot water heat pump is an investment into your property, and the environment.
Things to Consider with Heat Pump Cylinder Installations – Guide to purchasing a heat pump water heater
- Size of Tank
- Noise of Tank
- Location of Tank – keep it near the kitchen sink.
- Co efficient of Performance
- Construction of tank materials if installed in a corrosive area near the sea.
- Getting a cable to that location.
- Keep them away from bedroom windows if operating at night.
- Often existing electric water heaters are installed in cupboards and installing a heat pump water outside frees up the cupboard which is a big feature for some customers.
- When the new water heater is installed outside there is no chance of it leaking inside.
- Size – 250-260 litres should be fine for most families depending on shower length and flow from the rose which can be adjusted. For large families choose models in the 300 litre range but reheating time is also a consideration.
- Timer operation if wanting to use night rates for water heating for extra low heating costs. Eg you could set the timer for 4am and heat the water for 3 hours and have showers at 7am using most of the hot water and not having the heating come on till the next day at the same time leaving the standby losses low also.
Are heat pump water heaters sustainable?
As mentioned by Mitsubishi, water heating is one of the largest sources of greenhouse gas emissions in an average Kiwi home. According to the Energy Efficiency & Conservation Authority (EECA), heat pump water heaters can help in reducing greenhouse gas emissions and expenses on energy consumption.
Heat pump water heaters are eco-friendly and will help you reduce the carbon footprints of water heating. It is one of the most sustainable methods of heating water. A traditional electric hot water heat pump generates three times more greenhouse gases compared to a heat pump water heater. You can switch to heat pump water heater to save energy, environment as well as money.
There are heat pump water heaters that have low global warming potential (GWP), and zero ozone depleting potential (ODP). This is helpful in minimising the climate impact.
Benefits of using heat pump water heaters
Cut out the Gas Line Charge $8000 saving over 10 Years
Less energy consumption
Can work where solar water heaters can’t
Use night-rate electrical plans efficiently
Heat Pump Water Heaters - Alternative to Solar water heating
Heat pump water heaters are a good alternative to solar water heating. The energy efficiency of heat pump water heaters is really good, which makes them suitable for places where you can’t use or install solar water heating.
Heat pump water heaters are good for if you are looking at saving money, and energy. With a heat pump water heater, you can get similar output that would get from a solar heating system. If you live in a place where there is not enough sunlight to charge the solar panels, then you can think of getting a heat pump water heater installed on your property in Wellington.
Our professional heat pump water heater Wellington installers can replace your solar water heating system with the heat pump water heater.
Call Now on 0800 484 353 and discuss your options to switch to a heat pump water heater in Wellington.
External Heat Pump Water Cylinders
External heat pump water cylinders can often be installed both inside and outside. External heat pump water cylinders are often installed in the garage and have ducting inside the roof apex. It captures the waste heat generated in the ceiling. This improves its heating efficiency. They cannot be installed in cupboards inside without the ducting.
Parex manufactures a heat pump tank called EcoSpring. It comes in 190 and 300-litre models. It is one of the most efficient water heaters in the market. It uses about 1kW of electricity for 3 kW input into the water. With electricity at 28 cents per kW (2025), the real cost is about a 1/3 of that, which is about the cost of gas.
Parex has updated the older units with a new look and specifications. They are a budget conscious unit and they have two models.
New Generation Heat Pumps - Apricus Heat Pump
Get Apricus All in One R290 heat pump installed in your Wellington property. Apricus All in One R290 heat pump is one of the cost-effective heat pumps available in the market. It has dual heating technology that can provide hot water up to 70°c. It also has a smart touch screen controller which helps in changing heating requirements easy. You can also check important operational data and more using their Hot Water Hub app. Download the specifications guide for Apricus All in One R290 heat pump here.
Entry-level Hot Water Heat Pump - Rinnai Enviroflo™
The Rinnai Enviroflo™ is an energy-efficient hot water solution designed for outdoor installations, with potential for indoor setup in non-occupied spaces. It offers up to 70% savings on hot water costs and features a reliable electric element, user-friendly control interface with multiple modes, and built-in frost protection for colder climates.
This hot water heat pump system is eco-friendly, using a minimal charge of low-GWP R290 refrigerant, and is suitable for both hard and soft water areas. Ideal for homes with 2–5 people, it operates quietly and includes an auto disinfection function to prevent legionella growth. It comes with a 5-year warranty for cylinders, 3 years for refrigeration components, and 1 year for other parts.
Download the specifications guide for Rinnai Enviroflo™ heat pump here.
Monoblock Heat Pump Water Heater
The Haier Monoblock Heat Pump Water Heater is a next-generation, energy-efficient hot water solution designed specifically for New Zealand homes. Ideal for homeowners seeking to reduce power bills and environmental impact, this all-in-one system replaces traditional electric hot water cylinders with cutting-edge heat pump technology. It captures heat from the ambient air—even in temperatures as low as -7°C—and uses it to heat water efficiently, slashing energy use by up to 79% compared to standard electric systems.
More than just efficient, the Haier Monoblock is smart and sustainable. It features built-in Wi-Fi connectivity and integrates with the SmartHQ™ app, allowing you to control water heating remotely, schedule off-peak usage, and connect with solar PV systems. The system uses eco-friendly R290 refrigerant, which has an extremely low Global Warming Potential (GWP), making it one of the greenest options available today.
Want to save environment? Want to save money? Why not save both?!
Switch to heat pump water heater in Wellington
Case Study Gas to Electric Heat Pump
A house was built in 1982 with a gas storage tank, and as at 2025, is over 40 years old.
The tank is nearing the end of its life. Before it starts leaking and causing damage, and leaving the occupants with no hot water it should be replaced.
Current running costs are 17c with an efficiency of 70% making it about 24c per kilowatt.
Options are –
- An electric tank at 28c per kilowatt and $5,000 installation cost.
- or a more efficient gas water heater at 18.5 cents per kilowatt and shifting it outside $4,500;
- or a heat pump water heater at 7c per kilowatt and $11,000 installed cost including electrical cable.
As you can see there are big differences in installation cost and running costs for each of the systems.
The costs are dependent on the installation location. In this case the current hot water heater is installed inside and this will free up the cupboard which is also a big feature. Piping will be well insulated to limit heat loss.
Another consideration is distance to the kitchen which is the most common draw off.
Choosing the heat pump option should save $16-17,000 at todays energy costs over 10 years paying for the entire installation and delivering a return. Plus the new storage space.
Alternatives – shifting to a more efficient gas water heater would also deliver savings but not as much as the heat pump. With savings of about $8000 over ten years.
The standard electric water heater would have the highest running costs and cost more than the existing gas water even with its poor efficiency.
Brands We Install
Apricius – Eco Energy – solid unit- Good COP.
Rinnai – Name brand good support, 3 models – small medium and large.
Rheem – High COP.
Parex – Low Price.
Split systems
Mitsubishi – powerful