Heat pump retrofits challenge myths regarding historic buildings and efficiency sequencing

Recent developments in heating retrofits highlight the feasibility of transitioning historic buildings from gas boilers to heat pumps. In Stockport, England, a renovation of an 1872 house demonstrated that switching to energy-efficient heat pumps does not necessarily require extensive structural disruption or the removal of all flooring. The installation utilized specific pipework updates and placed the hot-water cylinder in an outbuilding to preserve the property's character.

In Ireland, a national heat study has provided evidence regarding the sequencing of energy efficiency upgrades. The study suggests that a “fabric first” approach—where extensive insulation and building repairs must be completed before replacing fossil fuel heating—can act as a trap that delays decarbonization. Experts and national energy-system modelling indicate that boiler replacement and comprehensive renovation are distinct projects with different timescales, suggesting that heat pump installation should not be automatically delayed by extensive building renovations.