HPAC

Cut your heating costs by 30–60%

Repower your central heating

Replace your ageing boiler with a modern hot water heat pump system — without sacrificing performance. Estimate your savings using our calculator below.

Why upgrade to a heat pump system?

Modern high-temperature heat pumps are designed specifically for radiator and underfloor heating systems, making them an ideal replacement for aging diesel and gas boilers.

Expert installers

40+ years of Canterbury HVAC experience

Local Experts You Can Trust

With over 40 years of HVAC experience in Canterbury, HPAC specialises in upgrading existing hydronic heating systems.

Our team understands:

Older boiler installations
Retrofit challenges
High-temperature heat pump technology
Radiator and underfloor heating systems
How to maximise performance from existing infrastructure

From initial assessment through to commissioning, you'll be dealing with specialists who understand both traditional and modern hydronic heating systems.

Green loan eligible

Green loans may cover your upgrade with low or no interest

Make Your Upgrade More Affordable

A number of New Zealand banks now offer Green Loan products to support energy-efficient home improvements.

Low or zero-interest lending may be available for eligible homeowners undertaking a heating system upgrade. While eligibility and lending terms are set by the bank, HPAC can provide all necessary technical and commercial documentation to support your application.

Combined with lower running costs, Green Loan finance can help make upgrading to a modern heat pump system more accessible and affordable.

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Smart controls

Better comfort and efficiency with modern system control.

Take Control of Your Comfort

Modern heat pump systems do more than just heat your home—they heat it smarter.

Using weather compensation and intelligent controls, the system automatically adjusts its output based on outdoor conditions, delivering consistent comfort while minimising energy use.

Many systems can also be upgraded with smart thermostats and WiFi-enabled controls, giving you the ability to monitor and adjust your heating from your smartphone or tablet.

The result is a warmer, more comfortable home, lower running costs, and greater control over how and when you use energy.

Reliable comfort, modern technology

High-temperature heat pumps deliver the same performance as boilers

What Is a Heating System “Repower”?

We replace your existing boiler with a modern high-efficiency heat pump — while retaining your existing radiators, underfloor heating, and (where applicable) hot water system. In many cases this allows homeowners to upgrade to modern heating technology without replacing the entire heating system.

That means:

No major internal disruption
Faster installation
Immediate efficiency gains

The result is the same comfortable heating performance, delivered more efficiently and with lower running costs.

Cleaner and future-proof

Lower emissions and ready for an electrified future

Why Replace an Older Boiler System?

If your boiler powered system is 10+ years old, you’re likely experiencing:

Rising energy costs
Fuel availability concerns
Reduced reliability
Expensive maintenance or repair risks
Outdated, inefficient technology

A modern heat pump repower addresses these issues while reducing emissions and future-proofing your home's heating system.

Cut running costs

Reduce heating costs by 30–60% vs diesel or gas systems*1

Example Savings (Typical Canterbury Home)

For a 200m² home upgrading from a diesel boiler system:

Approx. annual heating demand – 45,000kWh
Diesel boiler running costs = ~$11,000/year (based on $2.50/litre)
Heat pump running costs = ~$4,000-$5,000/year (based on $0.25/kWh)

Potential annual running cost savings: $5,000-$7,000 per year

Your actual savings will vary depending on your home and system — use the estimator above for a quick estimate.

Frequently asked questions

How long does a typical upgrade take?

Every system is different, but most boiler-to-heat-pump upgrades can be completed within a few days. During your assessment we will outline the installation process and any expected disruption so you know exactly what to expect.

Can I finance the upgrade?

Many banks offer green loan options for energy-efficient upgrades, often with low or no interest for a fixed period.

We can provide the information you need to support your application.

Can I make changes to my system while it is being upgraded?

Yes. We can tailor your upgrade to include improvements such as adding a hot water cylinder, upgrading radiators, or extending your system.

All options can be assessed during your free on-site consultation.

Do I need to replace my entire heating system?

Not usually. In many upgrades, we retain your existing radiators or underfloor pipework and replace only the central plant. Every home is different, so we assess your system and recommend the most efficient approach.

Will a heat pump system heat my home as well as my existing boiler?

Yes. Modern high-temperature heat pump systems are designed specifically to replace traditional boilers and can deliver the same or similar water temperatures that the existing system is designed to work with.

In most cases, your home will feel just as warm—but with significantly reduced operating costs.