Is My Home Suitable for a Heat Pump?

Victorian, terraced and period homes

A persistent myth is that heat pumps only work in modern, well-insulated homes. This is outdated. The Energy Systems Catapult tested heat pump installations across 750 UK properties — including Victorian terraces and 1960s flats — and found no type or age of property that could not have a successful installation.

The key for period homes is correct design:

• High temperature heat pump (Vaillant aroTHERM plus, Daikin Altherma 3H HT): delivers 70-75°C flow temperature, matching your existing radiators without replacement.
• Heat loss survey (BS EN 12831): the survey will identify which rooms need radiator upgrades. Often only 1-3 rooms in a typical Victorian terrace.
• Loft insulation is the easiest win in period homes: 200mm of mineral wool costs £300-600 and dramatically reduces heat demand.
• Solid wall homes: external or internal wall insulation is available under ECO4 funding for lower income households. Not always necessary — many solid wall homes run heat pumps effectively without it.

The only way to know for certain

The only reliable way to determine heat pump suitability and the right size unit for your home is a professional heat loss survey (to BS EN 12831 standard). This takes 2-4 hours and involves measuring every room, assessing insulation levels, window types and orientation.

Any installer who quotes without a heat loss survey is guessing. An oversized pump will cycle on and off inefficiently. An undersized pump will struggle to heat the home. Correct sizing is critical.

Heat loss surveys typically cost £150-300 as a standalone service, though many installers include them as part of the quote process (verify this before committing).