Heat pump hot water systems New Zealand (2026 guide for new builds)

If you’re building a new home in New Zealand, choosing the right hot water system is critical for long-term energy efficiency and running costs.

Hot water typically accounts for 25–35% of household electricity use, making it one of the largest contributors to power bills.

That’s why heat pump hot water systems in New Zealand are becoming the preferred choice for new builds.

What is a heat pump hot water system?

A heat pump hot water system works by extracting heat from the surrounding air and transferring it into water stored in a tank.

Unlike traditional electric cylinders or gas systems that generate heat directly, heat pumps move heat, making them significantly more energy efficient.

Key benefits:

• Lower electricity consumption

• Reduced power bills

• Lower carbon emissions

• More efficient than electric or gas hot water systems

How much can you save?

A typical household of four in New Zealand can save $1,000+ per year by switching from a standard electric hot water cylinder to a heat pump system.

Actual savings depend on:

• Household size

• Hot water usage

• Electricity pricing

• Whether solar is installed

Why install a heat pump hot water system in a new build?

Installing a heat pump system during construction is the most cost-effective approach.

Benefits for new builds:

• Easier and cheaper installation

• Optimised system placement

• No need for future upgrades

• Supports fully electric homes (no gas connection required)

Installation requirements and positioning

Heat pump hot water systems are typically installed outdoors.

For best performance:

• Install close to bathrooms or main hot water demand areas

• Allow at least 300mm clearance for airflow

• Units can be installed against an external wall

Correct positioning improves efficiency and long-term performance.

Choosing the right heat pump hot water system in New Zealand

When comparing systems, key factors to consider include:

• Energy efficiency (COP rating)

• Hot water recovery rate

• Smart controls and scheduling

• Warranty and reliability

• Compatibility with solar systems

Emerald Pro Heat Pump Hot Water System (New Zealand)

For new builds, the Emerald Pro heat pump hot water system is designed to deliver high performance and long-term savings.

Key features:

• High efficiency (COP 5.2)

  Produces over five units of heat for every unit of electricity used

• Fast hot water recovery (up to 112L per hour)

  Suitable for larger households and high demand

• Smart app control

  Schedule heating, monitor usage, and optimise for off-peak or solar

• Strong warranty

  7 years on the tank and 5 years on parts and labour

Nationwide supply across New Zealand

Heat pump hot water systems are available across New Zealand, with delivery options depending on your location.

Installation can be completed by:

• Your preferred plumber, or

• Our trusted installation partners across the country

Final thoughts

If you’re building a new home, installing a heat pump hot water system in New Zealand is one of the most effective ways to reduce energy costs and improve efficiency from day one.

With rising electricity prices and increasing demand for sustainable homes, heat pump systems are quickly becoming the new standard.

Looking for the right system for your build?

Get in touch to find the best heat pump hot water solution for your project.