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Key takeaways:

• A hybrid heat pump combines an air source heat pump with a traditional boiler for maximum flexibility and efficiency.
• It automatically switches between renewable and conventional heating based on which is most cost-effective, as well as outside temperature.
• Hybrid systems are ideal for homes that aren’t fully suited to a standalone heat pump.
• Government grants can help with installation costs subject to eligibility.
• Regular servicing may keep the system running efficiently and extends its lifespan.

Please note: Hive does not sell hybrid heat pumps.

If you’re looking to lower your heating bills and cut carbon emissions without giving up the comfort of a traditional boiler, a hybrid heat pump might be the right fit. This setup combines renewable and conventional technology, offering maximum efficiency and flexibility in one system.

Below, we’ll explain how hybrid heat pumps work, their advantages and costs, and the financial support available to help with installation.

What is a hybrid air source heat pump?

You might already know how an air source heat pump works, but what about a hybrid version? A hybrid air source heat pump can be combined with a gas or oil boiler to keep your home warm and your water hot all year round. Most of the time, the heat pump does most of the work by pulling warmth from the air outside. When it gets really cold or you need extra-hot water, the boiler steps in as backup.

This setup means you get the energy-saving perks of a heat pump, plus the peace of mind that comes with having a boiler. It’s a great option for homes that aren’t quite ready for a full heat pump switch, such as older properties with smaller radiators or less insulation.

How does a hybrid heat pump work?

A hybrid system takes the guesswork out of heating your home. It automatically switches between the heat pump and the boiler based on the weather and how much heat you need. When it’s mild outside, the heat pump does the job, using renewable energy to keep things comfortable. If the temperature drops or you need a quick boost of warmth, the boiler steps in. Some setups utilise smart control to check real-time energy prices and pick the most cost-effective option for you.

Usually, the boiler looks after your hot water, since it can heat it up faster and to higher temperatures than the heat pump. This means you get reliable heating and hot water, whatever the weather.

Hybrid vs bivalent systems

You’ll sometimes hear the term “bivalent system” used in place of “hybrid,” but they’re slightly different.

A hybrid heat pump uses smart controls to connect both the heat pump and the boiler, automatically switching between them as needed. With a bivalent system, things are a bit more hands-on. It usually relies on a simple thermostat setting. In fact, you pick the temperature that triggers the switch from heat pump to boiler.

For instance, you could set it so that the heat pump runs when it’s above 0°C outside, and the boiler takes over when it gets colder. While this approach isn’t as automated as a hybrid system, it still offers reliable heating and can work well for homes that need a backup.

Hybrid systems tend to be more advanced and user-friendly, with built-in automation that makes day-to-day use simpler and helps you get the most out of both technologies.

What are the advantages of a hybrid heat pump system?

Hybrid heat pumps can combine the strengths of both a heat pump and a boiler, giving you flexibility and savings while cutting down your carbon footprint. Here’s what you can expect:

Improved energy efficiency

With a heat pump, for every unit of electricity you use, you can get three to four units of heat in return, that’s 300–400% efficiency. According to the Energy Saving Trust, this is much higher than an A-rated gas or oil boiler, which only turns about 90–94% of its fuel into heat.

Reliable all year round

A hybrid setup gives you reliable heating in every season. The heat pump provides affordable warmth for much of the year, and the boiler ensures your home stays comfortable even on freezing winter days.

Reduced carbon emissions

Because the heat pump takes care of most of your heating, your reliance on fossil fuels is greatly reduced. This means lower carbon emissions compared with running a gas or oil boiler alone.

Increased home value

Adding a hybrid heat pump can make your home more attractive to future buyers. It’s a visible step towards cleaner, more efficient heating — something many people now look for in a property.

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What are the disadvantages of a hybrid heat pump system?

While hybrid heat pumps offer plenty of benefits, there are a few downsides worth being aware of before you decide to install one. Understanding these will help you weigh up whether a hybrid setup suits your home and long-term energy goals.

Not completely renewable

Because a hybrid heat pump still uses a gas or oil boiler, it isn’t completely renewable. The boiler does produce emissions when it runs, though much less often than a conventional system.

Higher upfront costs

Installing two integrated systems and advanced controls means paying more at the start. Even so, the flexibility, reduced energy use, and reliability make it a sound investment for many homeowners.

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How much does a hybrid heat pump cost?

A hybrid heat pump system typically costs more upfront than installing a new boiler on its own, but less than moving to a fully electric air-source heat pump system — particularly in homes that would otherwise need radiator upgrades or underfloor heating.

The overall cost includes both the heat pump and the boiler, along with smart controls that allow the system to switch efficiently between the two heat sources. Over time, many households are able to offset the upfront cost through lower running costs. This is most likely in well-insulated homes or where electricity tariffs offer cheaper rates during off-peak hours.

Is a hybrid air source heat pump right for you?

A hybrid air source heat pump is a great option if you want to lower your energy bills and shrink your carbon footprint, but aren’t quite ready to part with your current boiler. It’s flexible, efficient, and dependable throughout the year—perfect for homes that want to move towards cleaner heating gradually.

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FAQs

Do hybrid heat pumps need servicing?

Yes. Both the heat pump and boiler need annual servicing to maintain efficiency and safety. The heat pump service focuses on filters, refrigerant, and electrical components, while the boiler check covers combustion and system pressure.

Can you add a heat pump with an existing boiler

Often, yes. If your boiler is in good condition and compatible with the new controls, a heat pump can be added to create a hybrid system. Your installer can confirm whether your setup is suitable.

Can you combine and air source heat pump with a combi boiler?

A combi boiler with a hybrid heat pump can be worth it if you want to lower your gas use and heating costs without fully replacing your existing system. The heat pump handles most of the heating efficiently, while the combi boiler provides backup during colder weather or high hot-water demand. It’s a good balance between cost, comfort, and lower emissions, especially for homes not yet ready for a full heat pump setup.

Can you combine an air source heat pump with a gas boiler?

Yes - this is the most common type of hybrid heating system. The air source heat pump runs most of the time, and the gas boiler provides backup for hot water and colder weather.