Why a Mitsubishi Heavy Industries (MHI) Heat Pump Should Be on Your Shopping List

Choosing the right heat pump can feel overwhelming with so many brands and models available in New Zealand. That is where we can help. At OneAir, we have spent over a decade looking after homeowners in Auckland, Dunedin, Wellington, Waikato, and the Bay of Plenty to create warmer, healthier, and more energy-efficient homes. From chilly mornings in the south to sticky summer days in the north, we know which systems keep Kiwi households comfortable year-round.

This article is designed to give you clear, practical advice, based on our experience installing and servicing thousands of units across the country. As one of our most popular brands, we will share why Mitsubishi Heavy Industries heat pumps are a strong option worth considering if you are planning to upgrade, or buy your first system.

Here’s Why Mitsubishi Heavy Industries (MHI) Heat Pumps are Worth It

1. Energy Efficiency and Cost Savings

MHI heat pumps are engineered with high Coefficient of Performance (COP) and Energy Efficiency (EER)  ratings, meaning they deliver more heat or cooling energy than the electricity they consume. Benefits include:

• Lower power bills with consistent energy savings.

• Eco-friendly operation, reducing your household’s carbon footprint.

  
  

2. Built for New Zealand’s Climate

New Zealand’s weather can be unpredictable, but MHI heat pumps are tested for:

• Extreme cold performance (heating efficiently even in sub-zero conditions).

• Durability in coastal regions, with anti-corrosion treatment on outdoor units.

• Reliable cooling for hot, humid summers.

This makes MHI a trusted brand for households in diverse NZ environments.

3. Whisper-Quiet Operation

MHI heat pumps are among the quietest in the market and operate at very low decibel levels, making them ideal for:

• Bedrooms

• TV and movie rooms

• Home offices

Some models run as quietly as 19 dB(A), so you’ll barely notice it’s even on.

4. Advanced Comfort Features

MHI heat pumps are designed to adapt to your lifestyle with features like:

• 3D Auto Airflow: Distributes warm or cool air evenly across the room.

• Clean air Technology: Incorporates deodourising filters and enzymes that deactivate bacteria, mould and viruses

• Allergen Clear Operation: Helps break down pollen and dust, supporting healthier indoor air.

• Wi-Fi control (standard with most models, optional with most others): Manage your home’s temperature via smartphone or mobile device app.

  
  

5. How MHI Compares to Other Heat Pump Brands

Many leading heat pump brands serve NZ homes well. Where Mitsubishi Heavy Industries excels is in:

• Reliability — long-lasting performance backed by solid warranties and local (NZ)  Technical support.

• High heating efficiency — generally higher than most competitors’.

• Airflow technology — as a company with an aeronautical division, MHI is able to apply its technology to air flow design resulting in superior room coverage for consistent comfort.

• Engineering heritage — MHI has 140 years of engineering experience and remains at the forefront of technological innovation, for example, being the first company in NZ to introduce the latest-generation R32 refrigerant to VRF systems (other companies still commonly use R410A for those products)

  
  

6. Why OneAir Recommends MHI Heat Pumps

At OneAir, we recommend Mitsubishi Heavy Industries heat pumps for homeowners who want a reliable, efficient, and low-maintenance system. Over the years, we’ve seen MHI units perform exceptionally well across diverse NZ homes. Our role is to ensure:

• Correct sizing and design for your home’s layout

• Selecting the right product that best meets your requirements

• Correct installation using quality 

• Ongoing servicing to extend unit lifespan.

• Tailored advice based on your budget and comfort needs.

  
  

👉 Related Reading: Benefits of Whole-House Ventilation Systems

7. Choosing the Right MHI Heat Pump for Your Home

Factors to consider include:

• Room size and insulation quality

• External cladding type and colour

• Window size(s) and facing (aspect)

• Shade from large trees or awnings

• House location (average winter temperature)

• Budget and comfort goals

OneAir’s experts can guide you through the full MHI range — from compact wall-mounted units to powerful ducted systems for whole-home coverage.

Popular Mitsubishi Heavy Industries Heat Pump Models Available in New Zealand

If you’re considering a Mitsubishi Heavy Industries heat pump for your home, here are some of the most popular models our customers have been selecting in New Zealand:

Ciara™ Series

Cost-effective, yet includes WiFi as standard. Our best-seller by far with value-conscious customers. Price ranges approx. $1,599 – $3,299 NZD

Avanti Plus® Series (SRK-ZSA & SRK-ZSXA models)

Award-winning for design and performance. Has one of the highest heating output for its size and is an award-winner in independent tests for its efficiency. Compact, efficient, and whisper-quiet — perfect for bedrooms and small living spaces. Approx. $2,000 – $3,500 NZD

Bronte® Series (SRK-ZMXA models)

Powerful units ideal for larger rooms and open-plan living areas. Known for strong airflow and high energy efficiency in its class. Approx. $2,500 – $4,500 NZD

Avanti® Series (SRK-ZSXA models)

Stylish and reliable mid-range option. Great balance of affordability and performance. Approx. $2,000 – $3,800 NZD

MHI Ducted Systems

Popular option for those who want whole-home comfort. Provides discreet, even heating and cooling across multiple rooms through ceiling or underfloor ducts. We usually opt for the high static model which has excellent air distribution properties. Prices range from approx. $7,000 – $18,000+ NZD

MHI Multi-Split Systems

Ideal for households wanting to connect several indoor units to a single outdoor unit, reducing outside clutter and noise. Approx. $5,000 – $12,000+ NZD (depending on number of units)

Frequently Asked Questions About MHI Heat Pumps

Are Mitsubishi Heavy Industries heat pumps energy efficient?

Yes — many models have high COP and EER ratings, meaning lower power bills and efficient heating and cooling no matter what the temperature is outside.

Do MHI heat pumps work in cold NZ winters?

Absolutely. They are a popular choice even in the South Island where sub zero winter temperatures are common.

Are MHI heat pumps quiet?

Yes — select models operate as low as 19 dB(A), making them ideal for bedrooms and quiet spaces.

Do they have Wi-Fi control?

Yes — most units have WIFi as standard or have optional Wi-Fi adapters for personal device control.

How long do they last in NZ homes?

Based upon our experience, with proper installation and servicing, MHI heat pumps often last 12–15 years or more.

Are MHI Heat Pumps Right for You?

When you’re investing in a heat pump, you want a system that won’t let you down — one that keeps your home comfortable, runs efficiently, and lasts for years. Mitsubishi Heavy Industries heat pumps tick all those boxes. They’re reliable in  tough enough to withstand New Zealand’s tough climate conditions , quiet enough for bedrooms, and smart enough to adapt to the way you live.

At OneAir, our goal is to make the buying process simple and stress-free. We’ve helped homeowners across the country choose and install the right heat pump for their homes, and we’ll do the same for you. From selecting the best model to making sure it’s fitted properly and supported with ongoing care, you can count on us to get it right.

👉 Book a free consultation with OneAir today and find out whether a Mitsubishi Heavy Industries heat pump is the perfect match for your home.