Boiler Heat Pump Hybrid Systems

Heat pump adoption has faced barriers, particularly in older homes with inadequate insulation or outdated heating infrastructure. Upgrades, such as larger radiators, underfloor heating, and improved insulation, may be necessary to maximize system performance. The high upfront cost remains a concern, but government-backed grants and incentives are being developed to make the transition more accessible.

The government is now promoting boiler-heat pump hybrid systems as part of a government-backed strategy to decarbonise domestic heating and meet net-zero carbon emissions. An ambitious plan to decarbonise the UK housing sector aims to install 600,000 heat pumps per year by 2028. However, hybrid systems are being promoted due to concerns about their high upfront costs, space constraints, and compatibility with older housing stock. Such systems offer a more flexible and cost-effective solution for many homes, combining gas boilers for backup during the colder months with heat pumps for daily use.

Hybrid heating systems combine air-source heat pumps or ground-source heat pumps with conventional gas or hydrogen-ready boilers. This setup prioritizes efficiency, leveraging each component for its strengths. Heat pumps serve as the primary heat source, extracting renewable energy from the air or ground. They operate efficiently in mild to moderate conditions, offering a Coefficient of Performance (COP) of 3-4. During colder periods or peak demand, the gas boiler activates, delivering high-temperature heat and ensuring uninterrupted warmth. The system’s smart controls seamlessly switch between the heat pump and boiler based on external temperature and energy efficiency.