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HeatSage, Connected Response’s retrofit smart control technology for electric storage heating, recognised as SAP compliant measure

Tuesday 24th February 2026
HeatSage technology can now be used in SAP assessments and is accepted as a retrofit energy efficiency measure which qualifies for funding under energy efficiency schemes such as the Warm Homes: Social Housing Fund (WH:SHF), the Warm Homes: Local Grant (WH: LG), and the Scottish Government’s Social Housing Net Zero Heat Fund (SHNZHF)

DESNZ (Department for Energy Security and Net Zero) has approved Connected Response’s HeatSage technology as a SAP compliant measure.

HeatSage technology can now be used in SAP assessments and is accepted as a retrofit energy efficiency measure which qualifies for funding under energy efficiency schemes such as the Warm Homes: Social Housing Fund (WH:SHF), the Warm Homes: Local Grant (WH: LG), and the Scottish Government’s Social Housing Net Zero Heat Fund (SHNZHF).

HeatSage technology has been classified as automatic charge control under SAP. SAP modelling undertaken by BRE to assess the performance of HeatSage as automatic charge control found the SAP score was increased in all the scenarios considered. We expect it to be particularly beneficial for older, less energy efficient properties with lower EPC ratings.

With the introduction of the Home Energy Model (HEM), Connected Response is undertaking further research in partnership with BRE to assess the full benefits of HeatSage beyond those currently captured within SAP.

How HeatSage retrofit technology works  There are an estimated 1.5 million dwellings in the United Kingdom that are heated by electric storage heaters. Storage heaters have traditionally been charged overnight using off-peak electricity. Unfortunately, this means residents are typically too warm in the morning and, particularly on chilly autumn or winter days, too cold in the afternoons and evenings.

HeatSage technology optimises the charging of both standard and HHR (High Heat Retention) storage heaters across the off-peak charging windows available on a given tariff. HeatSage also uses the following day’s local weather forecast to adjust charging; a feature known as ‘weather compensation’.

HeatSage retrofit technology is being used to optimise heating and hot water in over 15,000 homes across the United Kingdom. The data captured by HeatSage indicates that annual heating and hot water demand in these properties has been reduced by 30% on average.

Connected Response is immensely proud that SAP classification has been achieved for HeatSage technology after a long and demanding process. We know that HeatSage can make a significant contribution to reducing heating and hot water demand for tenants with electric storage heaters and, in some cases, help lift tenants out of fuel poverty

Key takeaways for the energy efficiency supply chain  

Social and private landlords HeatSage technology is simple and quick to install. HeatSage SAP compliance provides an opportunity to maximise your grant funding opportunities in this financial year, with the potential of uplifting EPC banding for some of your properties.

HeatSage’s temperature and humidity monitoring data supports compliance with Awaab’s law.

Connected Response can help you with tenant engagement. On HeatSage projects we have a very successful track record, with tenant uptake of over 90%.

Installers HeatSage installation training is straightforward and can be undertaken in less than one day. The ability to install HeatSage helps you maximise the measures you can offer your clients.

Energy advisors/retrofit assessors Awareness of the HeatSage SAP classification helps ensure your assessments are up to date. HeatSage is a low cost retrofit option that means you can save your clients money and avoid the replacement of existing storage heaters.

Next steps? 

To find out more about retrofit HeatSage technology’s SAP classification call the Connected Response team on 0800 246 5561.

  • Press Release - CR24022601 - EPC Ratings Image (002)

 

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