It takes two

// heating and ventilation

Hybrid heat pumps are an attractive option for combi boiler replacement, particularly as they are eligible for domestic Renewable Heat Incentive payments, says Iain Bevan, Southern Sales Manager, Heating and Renewables, Daikin UK.

Registered social landlords addressing end of life boiler replacement in their properties have increased choice thanks to new hybrid technologies and the introduction of the domestic Renewable Heat Incentive (dRHI).

Until now, social landlords who have been constrained to like for like replacement of old gas boilers now have an opportunity to easily introduce renewable technologies, that both reduce environmental impact and - crucially for social housing tenants – reduce ongoing fuel costs.

The introduction of dRHI means renewable systems are becoming a more viable and attractive home heating method. The purpose of dRHI is to help mitigate the capital cost difference between a traditional boiler and a renewable alternative through a seven-year cash back scheme. This payment, combined with fuel cost savings, delivering attractive payback times and has therefore significantly undermined cost as a barrier to uptake.

Hybrid systems combine familiar technology - such as a gas boiler - with a more efficient renewable heating solution, like an air-to-water heat pump. The Daikin Altherma hybrid heat pump system, for example, is unique in that it combines a gas condensing combi boiler with an air-to-water heat pump and can be connected directly to existing pipework and radiators making it an ideal solution for replacing an existing combi boiler.

Daikin’s Altherma hybrid heat pump system is up to 35% more efficient in heating than the most efficient gas condensing boilers. It has two settings for heating: ‘ecological’ or ‘economical’. In ecological mode, the user can decide to minimise the ecological impact of their heating system by limiting carbon emissions rates. In the economical setting, the smart controller automatically searches for the operating conditions with the lowest running costs based on energy prices (electricity and gas), heat pump efficiency and heat load. This combined operation helps tenants to reduce their energy bills and ensures complete comfort all year round. Over an entire year, up to 70% of the energy required for heating can be provided by the heat pump, either on its own, or operating in combination with the condensing boiler in hybrid mode. In this mode, water is pre-heated by the more efficient heat pump, reducing the energy required from the boiler. Only at the coldest times of the year does the boiler work alone.

The compact indoor unit, which includes both a boiler and the heat pump hydrobox, fits in the same space as a conventional wall-hung combi boiler. This is connected to an outdoor unit that can be installed discretely, up to 20m away from the property.

To be eligible for the dRHI, both the heating system and the installer must be Microgeneration Certification Scheme (MCS) accredited. Because they run alongside traditional heating, hybrid systems have to be metered for the landlord to receive payments. Daikin Altherma hybrid heat pump systems have full MCS accreditation and come meter-ready.

Landlords considering end of life boiler replacement programmes are urged to consider these new combi boiler hybrid systems. Combined with the dRHI, they provide a credible renewable option for the UK’s vast stock of semi-detached and terraced single bathroom properties – saving tenants money and reducing carbon emissions without taking up any more internal space than the traditional solutions.

The unique Daikin Altherma Hybrid has been met with universal acclaim since its launch earlier this year, winning three major awards:

Product Innovation of the Year – National Heat Pump Awards 2014
Heat Pump Product of the Year – RAC Cooling & Heating Awards 2014
Green Innovation of the Year – Energy Efficiency & Renewables Awards 2014

To find out more about the award-winning Daikin Altherma hybrid system and watch our video case studies, visit

Watch the videos:

Shackleton & Wintle talks about using Daikin products

MCS approved plumbing & heating engineers, Shackleton & Wintle, talk about working with Daikin UK and the award-winning Daikin Altherma Hybrid heat pump, featuring interviews with a project surveyor and tenant of Severn Vale social housing provider.

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