Hot Water Heat Pumps → Mitsubishi Electric Hot Water Heat Pumps
Mitsubishi Electric Hot Water Heat Pumps
Efficient hot water (and home heating) solutions, built for New Zealand
Mitsubishi Electric’s Ecodan air-to-water heat pump systems deliver a powerful, energy-efficient solution for both hot water and home heating. Combining advanced heat pump technology with smart controls, Ecodan systems can help you significantly lower your energy bills while enjoying reliable hot water, and even central heating, all year round.
At Jason Brown Plumbing & Gas, we supply, install and support Ecodan systems, helping you choose and tailor the right setup for your home.
Why choose Mitsubishi Electric Ecodan?
Up to 70% savings on hot water and heating power use compared with traditional electric or gas systems.
Energy-efficient & low environmental impact by extracting heat from the air rather than burning fuel.
Hot water + whole-home heating in one system can supply your hot water, underfloor or radiator heating, and central heating needs.
Reliable hot water even in cold conditions, including models designed to operate in subzero temperatures.
Flexible system options: full cylinder systems or modules that integrate with existing cylinders.
Attractive return on investment, payback periods can be as low as 4 years, depending on usage, tariffs and household size.
System types & what they do
Packaged cylinder system
The typical installation includes an outdoor Ecodan unit, hot water cylinder, and controller. This is a full hot water (and optionally home heating) solution built for efficiency and comfort.
Hydrobox + existing cylinder (retrofit-ready)
If you already have a hot water cylinder, the Ecodan Hydrobox module lets you connect the heat pump to your existing system, giving you heat-pump efficiency without needing a full cylinder replacement.
Combined hot water + whole-home heating (optional upgrade)
Ecodan isn’t just for hot water. Many Kiwis use it to run radiators or underfloor heating, a great solution if you want hot water and a warm house from the same system.
Key components of an Ecodan system
Every Mitsubishi Electric Ecodan system is built around three smart components that work together for efficient hot water, and optional whole-home heating:
Outdoor unit
Extracts heat from the air and transfers it into your hot water cylinder. Also powers radiators or underfloor home heating if included.
Hot water cylinder
A dedicated Ecodan cylinder designed for maximum energy efficiency and recovery times. Or, connect to your existing cylinder using a Hydrobox module, a smart option for retrofits.
Smart Energy Controls
Built-in monitoring and scheduling help reduce running costs. Features include:
Off-peak / solar PV timing
Advanced weather compensation
Zone temperature control (for heating systems)
Usage history + data monitoring
Together, these components deliver efficient, reliable hot water, with the option to heat your whole home from one system.
How does a Mitsubishi heat pump work?
The outdoor unit draws in ambient air and uses electricity to extract heat.
That heat is transferred to water, which stores in a dedicated cylinder (or existing cylinder, if using Hydrobox).
A smart controller monitors usage, temperature, and can schedule heating during off-peak power periods or when solar PV output is highest.
For whole-home heating setups, the same system distributes heat to radiators or underfloor circuits.
Thanks to high efficiency, often expressed as a high Coefficient of Performance (COP), Ecodan heat pumps deliver substantial heat output for minimal energy input.
Ready to upgrade your hot water (and heating)?
Switch to a Mitsubishi Electric Ecodan hot water + heating system and enjoy efficient, reliable hot water, with the added bonus of home heating when you need it.
Who should consider an Ecodan system?
Households wanting both hot water and home heating from a single system
Owners of older electric or gas hot water heaters seeking long-term savings
People building new homes or renovating, ideal for clean integration with heating + hot water
Homes with high hot water or heating demand (larger households, frequent showers, hot water + heating usage), payback tends to be fastest in these cases
Those who want future-proof, energy-efficient, and environmentally friendly heating and hot water solutions
Cost savings & return on investment
Because Ecodan systems are highly efficient, leveraging air-to-water heat pump technology, many homes see dramatic reductions in energy bills. With typical savings of up to 70% compared with conventional water heating and heating systems, and depending on usage and power tariffs, many homeowners see a return on investment within about four years.
Scheduling hot water heating during off-peak hours or syncing with solar PV can shorten this payback period even more.
Why Choose JB Plumbing for Energy-Efficient Hot Water Heat Pump Systems?
Award-Winning Expertise
Named 2025 Master Plumber of the Year—trusted for innovative, high-quality plumbing solutions.Smarter Hot Water
We supply and install heat pump systems that reduce energy use and lower your power bills.Qualified Installers
Fully licensed plumbers and gasfitters with the know-how to ensure your system runs efficiently and safely.Long-Term Savings
Heat pumps are a smart investment—we help you choose the right system to suit your home and water usage.Wellington’s Trusted Team
Proudly serving the region since 2005 with honest advice and expert installation.
What Everybody Should Know About Hot Water Heat Pumps.
Hot water heat pumps are quickly gaining popularity for their efficiency, cost savings, and environmental benefits. But what exactly are they, and how do they differ from traditional water heaters?
5 things you must know about hot water heat pumps.
1. How Hot Water Heat Pumps Work
A hot water heat pump extracts heat from the surrounding air and transfers it to heat water. Unlike conventional water heaters that generate heat directly, heat pumps use a refrigerant cycle similar to air conditioners but in reverse. This process requires less energy, making it an energy-efficient way to heat water.
Key Components: Heat pumps consist of an evaporator, compressor, condenser, and expansion valve. These work together to transfer heat from the air to the water tank.
Efficiency Advantage: For every unit of electricity consumed, heat pumps can produce up to three to four units of heat, significantly more efficient than electric resistance heaters.
2. Energy and Cost Savings
Switching to a hot water heat pump can lead to substantial energy and cost savings over time. Traditional electric water heaters can be costly to operate due to their high electricity consumption. In contrast, heat pumps use much less energy.
Cost Comparison: While the upfront cost of a heat pump may be higher, the long-term savings on electricity bills make up for it. According to industry estimates, heat pumps can reduce water heating costs by up to 60%.
Return on Investment (ROI): For an average household, the ROI for a hot water heat pump can typically be achieved within a few years through energy savings alone.
3. Environmental Impact
Hot water heat pumps are not only efficient but also environmentally friendly. Because they use ambient air as a primary heat source, they produce fewer greenhouse gas emissions than traditional electric or gas water heaters.
Lower Carbon Footprint: By reducing electricity consumption, heat pumps contribute to lower CO2 emissions, helping combat climate change.
Sustainable Energy Use: Heat pumps align with renewable energy goals, especially if your home uses solar or wind energy to power the heat pump.
4. Maintenance and Longevity
Heat pumps are generally durable, but they do require some maintenance to operate at peak efficiency.
Routine Maintenance: The main tasks include keeping the coils and filters clean and checking for any refrigerant leaks. Scheduling an annual professional inspection can help maintain efficiency and prevent issues.
Expected Lifespan: A well-maintained heat pump can last 10-15 years or longer, outlasting most traditional water heaters.
5. How to Choose the Right System
Not all heat pumps are created equal, and the best choice depends on various factors, such as your climate, household size, and hot water needs.
Climate Considerations: Heat pumps work best in moderate to warm climates, but some models are designed to operate efficiently even in colder conditions.
Household Needs: Choose a heat pump with the right capacity. Larger families will need a bigger unit, while smaller households can benefit from a compact model.
Noise Levels: Some heat pumps can be noisy. Look for models that advertise quiet operation if noise is a concern.
Installation & smart control
When you choose Mitsubishi Electric through Jason Brown Plumbing & Gas:
We assess your home and existing hot water/heating setup
Help you select the right configuration (cylinder + outdoor unit, or Hydrobox + cylinder, or full heating system)
Install the system with full compliance to NZ regulations
Set up Smart Energy Controls for scheduling, monitoring, and efficient operation — giving you visibility over energy use and flexibility (timers, weather compensation, zone control)
Talk to the experts at Jason Brown Plumbing & Gas to find the right Ecodan solution for your home.
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Frequently Asked Questions
Do Ecodan systems work well in cold weather?
Yes — models are specifically designed for New Zealand conditions, including sub-zero performance for reliable hot water through winter.
Can Ecodan heat both my hot water and my home?
Absolutely. Many homeowners choose Ecodan to power radiators or underfloor heating, as well as domestic hot water — all from one system.
Can I connect Ecodan to my existing hot water cylinder?
Yes — with the Hydrobox module, Ecodan can retrofit to a compatible cylinder without a full replacement.
Will it help reduce my power bill?
Yes — most homes see up to 70% savings on heating and hot water costs, especially when switching from older electric or gas systems.
Is Ecodan compatible with solar power?
Yes — Smart Energy Controls allow you to schedule heating, making the most of solar PV output or off-peak tariffs.
How long does installation take?
Usually half a day to a full day, depending on the cylinder and heating setup.
Does it make noise outside?
No — the outdoor units are ultra-quiet (as low as 45 dB), ideal for urban or close-neighbouring homes.
What about maintenance?
Just basic servicing to keep it running efficiently — we can provide ongoing support and scheduled maintenance when needed.
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