The works, carried out in Dundee, are part of its long-term net zero strategy.

The programme involved retrofitting a block of 14 flats in the city, taking the homes from EPC ratings C and D to a B rating – a perceived small change but one which will be hugely important for customers’ homes, and pockets.

Among the works carried out were the fitting of external wall insulation: cavity wall insulation; triple-glazed windows and insulated doors; loft insulation top-up; solar panels; internal air source heat pumps, and ventilation improvements.

Monitoring equipment was also installed to record energy consumption, internal temperature, air quality and CO2 levels.

Retrofitting is the process of making improvements to a home so it becomes more energy efficient with lower emissions. It’s work that supports the Scottish Government’s net zero plan.

The work was partly funded by the Scottish Government’s Social Housing Net Zero Heat Fund. Home Group Scotland successfully bid for close to £500,000 in funding, which was matched by the housing association.

Bryony Willett, director of Home Group Scotland, said: “We are really pleased to have completed this pilot, which now acts as a successful blueprint as we plan for wider retrofits across Scotland.

“The benefits it will bring to our customers in Dundee will be tangible, as they will see significant savings on their energy bills, alongside having a safe warm home which I’m sure will be welcome news to them.

“The level and quality of work undertaken will ensure our customers’ homes are fit for purpose for many years to come.”