Is My Home Suitable for a Heat Pump?

The short answer: probably yes. The long answer: it depends on several factors. Here's the honest guide to heat pump suitability for UK homes.

Common myth: "You need perfect insulation for a heat pump"

This is incorrect. Heat pumps work effectively in many older UK properties with moderate insulation. What matters more is proper sizing (via heat loss survey) and an appropriately designed heating system. A well-designed heat pump in a poorly insulated property will still outperform a poorly designed heat pump in a well-insulated one.

Suitability factors

Outdoor space

Ideal: Any garden or yard wall space (min 0.5m clearance on three sides)

Challenging: No outdoor access or planning restrictions on external units

Insulation

Ideal: Loft insulation (200mm+) and cavity wall insulation present

Challenging: Uninsulated solid walls with no insulation planned

Heating system

Ideal: Wet underfloor heating or large modern radiators

Challenging: Old small radiators not replaced (though upgrades often included in quote)

Hot water storage

Ideal: Existing hot water cylinder

Challenging: Combi boiler only - new cylinder needed (adds £500-1,500)

Property type

Ideal: Detached, semi-detached, terraced - all can work

Challenging: High-rise flats with no outdoor unit location

EPC rating

Ideal: EPC C or above - ideal for heat pump efficiency

Challenging: EPC E-G - heat pump will work but improve insulation first if possible

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).

Get a heat loss survey How to find a good installer

Important disclaimer

heatpumpcompared.co.uk is editorially independent and not affiliated with any heat pump manufacturer or installer. We do not provide heating advice. Prices, specifications, SCOP ratings and grant amounts are correct as of April 2026 but are subject to change. Always commission a professional heat loss survey before purchasing a heat pump system.