Is My Home Suitable for a Heat Pump?

Heat pumps work brilliantly in the right property — but not every home is ready straight away. The good news is that most UK homes can accommodate a heat pump, often with fewer changes than people expect. Here's how to assess yours.

What makes a home suitable?

The key factors are insulation, radiator sizing, and outdoor space. A heat pump works by extracting heat from the outside air and delivering it to your home at a lower temperature than a boiler — typically 35–45°C rather than 60–80°C. This means your home needs to be reasonably well insulated to retain that heat, and your radiators need to be large enough to work effectively at lower flow temperatures.

Insulation — how good does it need to be?

You don't need a perfectly insulated home. Most properties built after the 1980s with loft insulation and cavity wall insulation will perform well with a heat pump. Older solid-wall properties can still work — they may just need slightly larger radiators or a higher flow temperature to compensate.

The BUS grant has no minimum EPC rating requirement, but we'll always assess your home honestly. If significant insulation work is needed first, we'll tell you — we'd rather give you the right advice than a quick sale.

Do I need to replace my radiators?

Often, no. Many homes already have radiators that are slightly oversized — particularly if they were installed when the house was built and the heating system has never been upgraded. We carry out a full room-by-room heat loss calculation (the Heat Geek method) to confirm exactly which radiators, if any, need upgrading before any work begins.

Underfloor heating is ideal for heat pumps, but it's not a requirement. A well-designed radiator system works just as well.

What about outdoor space?

An air source heat pump needs to be positioned outside — typically on a wall or on a ground-mounted frame. It needs reasonable airflow around it and should be positioned away from bedrooms where possible. Most properties have a suitable location — a side return, rear garden, or utility area works well.

The unit is roughly the size of a large air conditioning unit. We'll identify the best position during your free survey.

What types of property work best?

• Detached and semi-detached houses — ideal
• Bungalows — excellent (large floor area, easy pipework runs)
• Terraced houses — usually fine with the right system design
• Flats — generally not suitable for the BUS grant, and installation is more complex

The honest answer

The only way to know for certain is a proper heat loss survey. We offer these for free, with no obligation. We'll assess your home, tell you honestly whether a heat pump is the right choice, and if it is, we'll design a system that actually works — not just one that passes the MCS paperwork.