Insulation Matters: Keep Your Heat Pump Running Efficiently

Mariel • January 9, 2026

Air source heat pumps are becoming an increasingly popular choice for homeowners looking to reduce heating costs and lower their carbon footprint. They are efficient, eco-friendly, and ideal for modern homes. But even the most advanced air source heat pump cannot reach its full potential if your property loses heat too quickly. That’s why home insulation is so important — it allows your system to work smarter, not harder.

Why Insulation Makes a Difference

Air source heat pumps operate differently from traditional gas or oil boilers. Instead of producing short bursts of very hot air, they provide a steady, gentle heat. This method is highly energy-efficient, but it relies on your home being able to retain warmth.

Without proper home insulation, heat escapes faster than your pump can replace it. This forces your system to run longer, use more electricity, and still leaves rooms feeling cold. Effective insulation helps maintain a consistent indoor temperature while improving heat pump efficiency and reducing energy bills.

Loft and Roof Insulation

A significant amount of heat — sometimes up to 25% — can escape through the roof. Upgrading loft insulation is one of the most cost-effective ways to enhance heat pump efficiency.

Materials such as mineral wool, rigid boards, or spray foam all serve the same purpose: keeping heat inside. For optimal results, professional installation ensures insulation meets modern standards and allows your heat pump to operate at its best.

Windows, Doors and Ventilation

Draughty windows and poorly sealed doors allow heat to escape quickly. Upgrading to double or triple glazing, installing insulated doors, and using draught-proofing strips all help your heat pump maintain efficiency.

Ventilation is also important. Mechanical ventilation with heat recovery (MVHR) ensures fresh air circulation while keeping warmth inside, maintaining both comfort and indoor air quality.

Floor Insulation

Cold floors can make a room feel chilly even when the air is warm. Suspended timber floors benefit from insulation beneath, while concrete floors can be insulated during renovations or when laying new flooring.

Even small measures, such as sealing gaps around skirting boards, can noticeably improve warmth and comfort.

Whether you’re installing a new air source heat pump, upgrading an existing system, or looking to improve overall efficiency, focusing on home insulation ensures your system works at its best, delivering maximum comfort and energy savings.
Before installing a new air source heat pump, it’s important to know whether your home is properly insulated.
Darlington Heat Pumps can help check and assess your property to identify areas where heat is escaping and recommend improvements to maximise heat pump efficiency.

Contact Darlington Heat Pumps today to arrange an assessment and make sure your heat pump performs at its best.

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