The Ultimate Guide to Optimising Heat Pump Settings for Maximum Efficiency

Originally published 9 August 2024. Updated 9 March 2026.

Heat pumps are an essential part of many New Zealand homes, offering both heating and cooling solutions. 

To get the best performance and efficiency from your heat pump, it's crucial to understand and optimise the settings. 

This guide will delve into everything you need to know about heat pump temperature settings, ensuring you get the most out of your investment.

Understanding Heat Pump Settings

1. Thermostat Settings

The thermostat is the heart of your heat pump's control system. Properly setting your thermostat can significantly impact your energy consumption and comfort levels.

• Heating Mode: Set your thermostat to a comfortable temperature, typically between 18-22°C. Avoid setting it too high, as each degree increase can raise your energy consumption by up to 10%.
• Cooling Mode: For cooling, a setting of 22-26°C is recommended. Again, small adjustments can make a big difference in energy usage.

2. Fan Speed Settings

Fan speed settings on your heat pump can affect both comfort and efficiency.

• Auto Mode: This is often the best choice as the system will adjust the fan speed based on the temperature difference between the set point and the room temperature.
• Manual Mode: You can manually set the fan speed to low, medium, or high. Higher speeds can quickly change the room temperature but may result in higher energy consumption and noise levels.

3. Mode Settings

Heat pumps come with several mode settings to cater to different needs:

• Heat Mode: Used for warming the space.
• Cool Mode: Used for cooling the space.
• Auto Mode: Automatically switches between heating and cooling as needed to maintain the set temperature.
• Dry Mode: Reduces humidity without significantly altering the temperature. This can be useful in damp conditions.
• Fan Mode: Circulates air without heating or cooling. Useful for air circulation and filtration.

4. Timer Settings

Using the timer function can help manage your heat pump’s operation efficiently.

• On/Off Timer: Set the heat pump to turn on or off at specific times. This is particularly useful for ensuring the house is comfortable when you wake up or return home from work.
• Sleep Timer: Adjusts the temperature gradually to maintain comfort while you sleep, often leading to energy savings.

Advanced Settings and Features

1. Eco Mode

Eco mode is designed to maximise energy efficiency by adjusting the operation to use less power. This mode can slightly reduce the heating or cooling capacity, but the energy savings are significant.

2. Program Mode

Program mode allows you to set a schedule for different temperatures throughout the day. For instance, you can programme lower temperatures while you’re at work and higher temperatures when you’re at home.

3. Smart Controls

Many modern heat pumps come with smart controls, allowing you to manage settings via a smartphone app. These apps can offer advanced features like geofencing, which adjusts the temperature based on your proximity to home.

Read more: common symbols on heat pump remotes (with graphics)

Tips for Optimal Heat Pump Efficiency

1. Regular Maintenance

Regular maintenance is crucial for the efficiency and longevity of your heat pump. Clean or replace filters every 1-3 months and schedule annual professional maintenance.

2. Proper Installation

Ensure your heat pump is correctly installed. Poor installation can lead to inefficiencies and increased energy costs. Always use a certified installer.

3. Insulation

Good home insulation helps maintain the temperature, reducing the workload on your heat pump. Ensure windows, doors, and other openings are properly sealed.

4. Use Curtains and Blinds

In winter, open curtains during the day to let in sunlight and close them at night to retain heat. In summer, keep blinds closed during the hottest part of the day to keep the heat out.

5. Zone Heating/Cooling

If your heat pump supports it, use zone heating or cooling to only condition the rooms you’re using. This can lead to significant energy savings. 

Common Questions About Heat Pump Settings

What is the best temperature setting for a heat pump in winter?

Of course, the best temperature setting varies by season. In winter, aim for 18-22°C to avoid overheating your home.

What are the best heat pump settings for summer?

In summer, it's best to keep your heat pump set on the warmer side. Aim for 22-26°C. You can also try incorporating your heat pump's dry mode into your "cooling" strategy, since reducing humidity can make a warmer temperature feel more comfortable.

How can I save energy with my heat pump?

Use eco mode, programme the timer, maintain your unit regularly, and ensure your home is well-insulated.

Why is my heat pump blowing cold air in heating mode?

This could be due to several reasons, including a malfunction, incorrect settings, or defrost cycle. Consult your manual or a professional for troubleshooting.

How often should I clean or replace the filters in my heat pump?

Filters should be cleaned or replaced every 1-3 months, depending on usage and the manufacturer's recommendations. Regular maintenance ensures optimal performance and energy efficiency.

What should I do if my heat pump is not heating or cooling properly?

If your heat pump is not functioning correctly, first check the thermostat settings, filters, and power supply. If the issue persists, it may require professional servicing to diagnose and fix any mechanical problems.

Is it more efficient to leave the heat pump running all day or to turn it off when not in use?

It is generally more efficient to use the timer settings to turn the heat pump on and off according to your schedule. Running the heat pump only when needed helps save energy and reduces wear and tear on the system.

Can I use a heat pump in extremely cold weather?

Yes, modern heat pumps are designed to operate efficiently in a range of temperatures, including extremely cold weather. However, their efficiency may decrease as the temperature drops significantly, so supplemental heating may be needed in very cold conditions.

What is the defrost cycle on a heat pump, and how does it affect performance?

The defrost cycle is a process where the heat pump temporarily reverses its operation to melt any frost or ice that has accumulated on the outdoor unit. This is normal and necessary for maintaining efficiency, though it may cause a brief period where the heat pump blows cooler air.

Conclusion

Optimising your heat pump settings is essential for maximising efficiency and comfort in your New Zealand home. 

By understanding and correctly using thermostat, fan, mode, and timer settings, along with advanced features like eco mode and smart controls, you can enjoy a comfortable living environment while saving on energy costs year-round.

Regular maintenance and proper insulation further enhance your heat pump’s performance, ensuring you get the best value from your investment.

For professional advice and installation, always consult a certified heat pump specialist.

For professional guidance in the Christchurch area, reach out to the friendly experts at Enviro Master.

 

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