Best Ways to Increase Heat Pump Efficiency: Expert Tips from Reliable Renewables

Whether you have an air source heat pump (ASHP), ground source heat pump (GSHP), or a solar water heating system, maximising efficiency is the key to lower energy bills and a longer system lifespan. At Reliable Renewables, our NVQ Level 3 qualified heating engineers have helped thousands of homeowners across Nottingham, the East Midlands, Yorkshire, Lincolnshire, and North England get the most from their renewable heating systems.

Why Heat Pump Efficiency Matters

Heat pump efficiency is measured by the Coefficient of Performance (COP) — the ratio of heat output to electrical energy input. A well-maintained heat pump can achieve a COP of 3–4, meaning it produces 3–4 units of heat for every unit of electricity consumed. Poor maintenance, incorrect settings, or an ageing system can drop this significantly, costing you more on energy bills and increasing your carbon footprint.

1. Book Annual Heat Pump Servicing

The most impactful step you can take is scheduling a professional annual heat pump service. During a heat pump service, a qualified engineer will: check refrigerant levels and recharge if necessary, inspect and clean evaporator and condenser coils, test electrical components and controls, check system pressures and flow rates, inspect the expansion valve and compressor, and verify thermostat calibration. Regular heat pump maintenance prevents small issues from becoming costly repairs and keeps your system running at peak efficiency.

2. Optimise Your Flow Temperature

One of the most overlooked efficiency improvements is lowering your flow temperature. Heat pumps are most efficient when running at lower flow temperatures (35–45°C) compared to traditional gas boilers (60–80°C). If your home has underfloor heating or large radiators, you can often reduce the flow temperature and see significant efficiency gains. Ask your heat pump engineer about weather compensation controls, which automatically adjust flow temperature based on outdoor conditions.

3. Ensure Proper Insulation

A heat pump is only as efficient as the building it heats. Poor insulation forces your heat pump to work harder and longer to maintain comfortable temperatures. Key insulation improvements include: loft insulation, cavity wall insulation, double or triple glazing, draught-proofing doors and windows, and underfloor insulation where possible. Improving your home's Energy Performance Certificate (EPC) rating directly improves heat pump efficiency and reduces running costs.

4. Use a Smart Thermostat and Controls

Modern smart thermostats and heat pump controllers allow you to programme heating schedules, set different temperatures for different zones, and monitor energy consumption in real time. Brands like Nest, Hive, and manufacturer-specific controllers (e.g., Mitsubishi Ecodan, Daikin Altherma, Vaillant aroTHERM) can significantly improve efficiency by ensuring your heat pump only runs when needed.

5. Keep Outdoor Units Clean and Clear

For air source heat pumps, the outdoor unit must have unrestricted airflow to operate efficiently. Regularly check that: leaves, debris, and dirt are cleared from around the unit, there is at least 30cm clearance on all sides, the unit is not blocked by garden furniture, fencing, or overgrown plants, and the unit is not positioned in a frost pocket or area prone to flooding.

6. Check and Replace Air Filters

Dirty or blocked air filters are one of the most common causes of reduced heat pump efficiency. Filters should be checked every 1–3 months and cleaned or replaced as needed. This is a simple task that can make a noticeable difference to your system's performance and energy consumption.

7. Consider a Heat Pump Maintenance Package

At Reliable Renewables, we offer tailored heat pump maintenance packages for homeowners and businesses across Nottingham, East Midlands, Yorkshire, Lincolnshire, and North England. Our packages include annual servicing, priority callouts, and system health checks — giving you peace of mind and protecting your manufacturer's warranty.

8. Monitor Your Energy Bills

A sudden increase in energy bills without a change in usage patterns is often the first sign of a heat pump efficiency problem. Keep an eye on your monthly electricity consumption and contact a heat pump engineer if you notice unexplained increases.

For expert heat pump servicing, maintenance, and efficiency advice across Nottingham and the wider East Midlands, contact Reliable Renewables on 07775071761 or email reliablerenewables@outlook.com.

Heat pump efficiency tips from Reliable Renewables