Your First Heat Pump: What to Expect Before You Commit

Geraldine C.
Aug 5
9 min read

Winter in New Zealand can be a tough time for many people in older homes in particular, and finding an efficient, reliable way to keep your home warm is a key factor in how quickly these months will pass (and how comfortable you and your family will be through them). The good news is that if you've been considering a heat pump, you're on the right track. These versatile systems offer unique benefits, from efficient heating in winter to effective cooling in summer, along with improved air quality via advanced built-in air filtration. But for first-time buyers, the sheer number of makes and models available can feel a little overwhelming. What exactly do you need to know before you commit? What questions should you be asking and what answers should you be receiving?

At OneAir, we've been helping New Zealanders in Auckland, Dunedin, Wellington, Waikato, and the Bay of Plenty achieve efficient and cosy home comfort for years. As your trusted local HVAC experts, we have technicians and staff who understand the unique climate challenges and specific needs of homes across the North and South Islands. We've installed, serviced, and maintained countless heat pumps, giving us unparalleled insight into what makes a successful installation and more importantly, a happy homeowner. This article draws on our extensive experience to provide you with honest, practical advice, ensuring you're fully informed and confident in your decision to invest in a heat pump. Let's dive in!

Understanding Heat Pumps: More Than Just a Heater

Before we get into the practicalities, let's clarify what a heat pump is and how it works. Unlike traditional heaters that generate heat, a heat pump simply moves heat from one place to another. In winter, it extracts heat from the outside air, even on cold days, and transfers it indoors. In summer, it reverses the process, taking heat from inside your home and releasing it outdoors, effectively cooling your space. This ingenious method makes them incredibly energy-efficient.

Heat Pump Installation: The Foundation of Your Comfort

The heat pump installation process is arguably the most critical step in ensuring your system performs optimally for years to come. It's not just about plugging in a unit; it's a precise operation that requires skill and experience firstly in system design and then in the way the installation is done, the tools that the Technicians select and of course the materials that are used.

Why Professional Installation is Non-Negotiable

Trying to install a heat pump yourself or opting for an inexperienced installer can lead to a host of problems:

Inefficient Operation: Incorrect sizing or poor placement means your heat pump will work harder to heat or cool your home, leading to higher energy bills and reduced comfort.
Reduced Lifespan: Stress on the system from improper installation can significantly shorten its lifespan, leading to premature breakdowns and costly repairs.
Safety Hazards: Electrical connections and refrigerant handling require expertise and proper qualifications. Mistakes can pose serious safety risks, including electrical fires or refrigerant leaks.
Voided Warranties: Most manufacturers require professional installation for warranties to be valid. Don't risk losing your coverage for free repairs and system replacements which could save you thousands of hard-earned dollars.

What to Expect During Installation

When you choose a reputable company like OneAir, here's a general overview of what the heat pump installation process involves:

Site Assessment and Sizing: Our technicians will visit your home to assess its layout, insulation, window types, and your specific heating and cooling needs. This allows us to recommend the right size and type of heat pump for your space. Undersized units won't keep your home comfortable, while oversized units cycle on and off too frequently, wasting energy and wearing down components.
Unit Placement: We'll determine the optimal location for both the indoor unit (or units, for multi-split systems) and the outdoor unit. Proper placement ensures efficient airflow, minimal noise disruption, maximised lifespan and easy access for future maintenance.
Mounting and Connections: The indoor unit is securely mounted on a wall or ceiling, and the outdoor unit is level and securely mounted on a stable base. Refrigerant lines, electrical wiring, and condensate drainage pipes are carefully run and correctly connected between the units.
Electrical Work: A dedicated electrical circuit might be required, depending on the heat pump's power needs. This work is always carried out by a qualified electrician to ensure safety and compliance with regulations.
Vacuuming and Charging: The refrigerant lines are thoroughly evacuated using specialised pumps to remove any air or moisture, which can severely impair efficiency. Then, the correct amount of refrigerant is charged into the system.
Testing and Commissioning: Before an install is completed, the system is rigorously tested to ensure all components are functioning correctly, air distribution is even, and the unit is operating properly with all its features fully functional. We'll also walk you through how to use your new heat pump and its remote control and provide tips and tricks to ensure optimal efficiency.

Heat Pump Cost: Investing in Comfort and Efficiency

The heat pump cost is a significant factor for most homeowners. It's an investment, but one that typically pays off through lower energy bills and increased home value.

Factors Influencing Heat Pump Cost

Several elements contribute to the overall cost:

Type of Heat Pump:
- Air-to-Air (Air Source): These are the most common and generally the most affordable. They extract heat from the air and are the most common type of heat pump in NZ by far.
- Air-to-Water (Hydronic): These connect to radiators or underfloor heating systems, often more expensive to install, but highly efficient with unique comfort for whole-home heating.
- Geothermal (Ground Source): While the most expensive upfront due to extensive groundworks, they offer the highest efficiency and lowest running costs. Best suited for colder, south island regions where the .
Size and Capacity: Larger homes or those with high ceilings and poor insulation will require a higher capacity heat pump, which will naturally cost more.
Brand and Model: Just like cars, different brands and models come with varying price tags and features. Premium brands typically offer better efficiency, higher filtration, quieter operation and advanced smart features.
Installation Complexity: Factors like the distance between indoor and outdoor units, the need for extensive ductwork (for ducted systems), outdoor units mounted on the roof or wall, or difficult access can increase installation costs.
Additional Features: Wi-Fi connectivity, advanced filtration systems, or multi-zone capabilities can add to the price.

Breaking Down the Investment

The total heat pump cost includes:

Unit Cost: The price of the heat pump unit itself.
Installation Labor: The cost for the technicians to install the system.
Materials: All the necessary piping, wiring, mounts, trunking and other components.
Electrical Upgrades: If your home's electrical board is full and needs a sub board or if a new circuit is required, this will incur additional cost.

While the initial outlay might seem substantial, remember to factor in the long-term family comfort benefits and savings on your energy bills compared to other forms of heating. Heat pumps are far more efficient than traditional electric heaters or even gas heaters, plus have the ability to dehumidify damp air and switch into cooling mode in summer.

Heat Pump Maintenance: Keeping Your System Running Smoothly

Once your heat pump is installed, regular heat pump maintenance is key to preserving its efficiency, extending its lifespan, and avoiding costly breakdowns. Think of it like servicing your car; neglect it for too long, and you could run into trouble!

What You Can Do (DIY Maintenance)

There are a few simple tasks you can do yourself to keep your heat pump in good shape:

Clean or Replace Filters Regularly: This is perhaps the most important DIY task. Dirty filters restrict airflow, making your heat pump work harder and consume more energy. Check and clean them regularly making sure they are correctly.
Keep the Outdoor Unit Clear: Ensure the outdoor unit is free from leaves, grass clippings, dirt, and other debris. Trim back any shrubs or plants that are growing too close. Good airflow around the outdoor unit is essential for its efficient operation.
Check for Ice Buildup (Winter): In very cold conditions, ice can sometimes build up on the outdoor unit. Most modern heat pumps have a defrost cycle, but if you notice frequent and excessive icing (where no warm air is produced for 10-30min or so), contact a professional as it could indicate problems such as low refrigerant gas levels.
Keep Vents Unobstructed: Make sure furniture, curtains, or other items aren't blocking the airflow, which can hinder air distribution and reduce efficiency.

Why Professional Heat Pump Service is Essential

While DIY tasks are helpful, professional heat pump service is still a useful precaution to take. While some have their systems serviced two or three times per year, we typically recommend an annual service, ideally before the peak heating or cooling season. During a professional service, OneAir technicians will:

Thoroughly Clean Coils: The indoor and outdoor coils can accumulate dirt and grime, significantly reducing efficiency. Professionals have the right tools and cleaning solutions for a deep clean, reducing viruses, mould and bacteria .
Check Refrigerant Levels: Low refrigerant levels can indicate a leak, leading to poor performance and potential damage to the compressor. Our technicians will check levels and safely address any issues.
Inspect Electrical Connections: We'll ensure all wiring and electrical components are secure and free from corrosion, preventing potential electrical hazards.
Lubricate Moving Parts: Motors and fans might need lubrication to reduce friction and wear.
Inspect Fan Blades: Damaged or dirty fan blades can affect airflow and create noise.
Corrosion treatment : We will treat small areas of rust with anti-corrosion spray to extend the life of the outdoor unit
Check Drain Lines: Technicians flush and check to ensure the condensate drain line is clear and not blocked, preventing water leaks and mould growth.
Assess Overall System Performance: We'll test the heating and cooling cycles, thermostat accuracy, and overall operational functionality.
Identify Potential Issues: Regular servicing helps us to identify minor issues before they escalate into major, costly repairs.

Investing in regular heat pump maintenance and professional heat pump service ensures your system runs efficiently, prolongs its lifespan, maintains your warranty, and keeps your energy bills in check.

Choosing the Right Heat Pump for Your New Zealand Home

With so many options available, selecting the right heat pump can feel daunting. Here's what to consider:

Your Home's Size and Layout: Is it an open-plan living space or do you need to heat multiple rooms? This will determine whether a single-split system, multi-split system, or a ducted heat pump is best.
Insulation Levels: A well-insulated home will require a smaller, less powerful heat pump to achieve the same level of comfort, saving you money on both the unit and running costs.
Climate Zone: While heat pumps work well across New Zealand, colder regions might benefit from specific models designed for lower ambient temperatures.
Budget: Balance your upfront heat pump cost with long-term running costs and energy efficiency.
Features: Do you want WiFi with smart controls, air purification, or quiet operation? Prioritise the features that matter most to you.
Noise Levels: Consider the noise level of both the indoor and outdoor units, especially if they'll be near bedrooms or outdoor living areas.

Don't hesitate to consult with us. Our OneAir experts will provide tailored advice to help you select the perfect heat pump system for your home and lifestyle.

Ready to Commit? Next Steps with OneAir

Deciding to install your first heat pump is a smart move for year-round comfort and energy efficiency. By understanding the importance of professional heat pump installation, the factors influencing heat pump cost, and the necessity of regular heat pump maintenance and heat pump service, you're already well on your way to making an informed decision.

At OneAir, we pride ourselves on providing comprehensive, reliable HVAC solutions across Auckland, Dunedin, Wellington, Waikato, and the Bay of Plenty. Our certified technicians are committed to delivering top-quality service, from initial consultation and expert installation to ongoing preventative maintenance and timely repairs.

Don't let the New Zealand winter keep you cold and miserable in your home. Contact OneAir today for a no-obligation quote and let us help you find the perfect heat pump solution for your home. We're here to ensure your journey to cosy home comfort is smooth, efficient, and worry-free.

Frequently Asked Questions About Heat Pumps

Q: How long do heat pumps typically last?

A: With proper heat pump maintenance and professional heat pump service, a well-installed heat pump can last anywhere from 10 to 20 years, sometimes even longer. Factors like the quality of the unit, the intensity of use, and adherence to regular servicing schedules significantly impact its lifespan. Neglecting maintenance can drastically shorten its operational life.

Q: How often does a heat pump need maintenance?

A: We recommend professional heat pump service at least once a year, ideally before the start of the primary heating or cooling seasons (winter and summer in New Zealand). In addition to annual professional checks, you should perform simple DIY tasks like cleaning air filters every 1-3 months, depending on usage and household conditions (e.g., pets, allergies).

Q: What is the average cost of heat pump installation in New Zealand?

A: The heat pump cost for installation in New Zealand can vary widely depending on the type of heat pump, its capacity, the complexity of the installation, and the specific brand or model. For a standard air-to-air split system in a typical residential setting, you might expect costs to range from NZD $2,500 to $6,000 for the largest 10kW high wall system. Floor consoles, ceiling cassettes or ducted systems, will naturally be at the higher end of this scale, potentially exceeding $10,000 for the latter type as they are able to heat or cool an entire home. It's crucial to get a personalised quote from a professional like OneAir after an on-site assessment as there can be unforeseen issues that could delay or prevent a successful installation.

Q: What's involved in heat pump installation?

A: Heat pump installation involves several key steps. First, an assessment determines the right size and type of unit for your home. Then, the indoor and outdoor units are strategically placed and securely mounted. This is followed by running and connecting refrigerant lines, electrical wiring, and condensate drainage. Finally, the system is evacuated, charged with refrigerant, and thoroughly tested to ensure optimal performance and safety. Professional installation takes around 4 hours (double or more for a ducted) and is vital to ensure efficiency, longevity, and to keep your warranty valid.