Heat Pump vs Electric Boiler

Upfront price, manufacturer cover, aftercare commitment, and annual bills compared across both systems — so you can choose with confidence.

Cost Category

Heat Pump

Electric Boiler

Installation Cost

£8,000 – £17,000 (includes groundwork, refrigerant pipework, and cylinder). BUS grant of up to £7,500 available.

£1,500 – £7,500 installed. No groundwork required — fits directly into existing pipework in 1–2 days.

Manufacturer Warranty

5–7 years standard manufacturer warranty. Extended cover available via service plan.

2–10 years standard manufacturer warranty. Extended cover available with HomeCare.

Aftercare & Servicing

Specialist F-Gas engineer required for annual service. HomeCare plan recommended.

Standard annual boiler service by a qualified engineer. Simpler and lower-cost to maintain than a heat pump.

£900 – £1,950/yr at a COP of 350%. Lower with an off-peak or Octopus Cosy tariff.

£900 – £1,400/yr at standard rate. Offset significantly with solar PV and battery storage.

Estimated Annual Running Cost

Up to £9,790

Cheaper than a Heat Pump

1–2 Days

Typical electric boiler swap-out installation

Both heating systems completely eliminate fossil fuels on-site, yet their physical demands, pipework impact, and daily operational profiles differ considerably.

Installation Impact

Spatial Requirements

Running Efficiency

Electric boilers act as a swift swap into existing wet central heating circuits within one to two days. Heat pumps require external ground positioning, larger radiators, and extensive domestic pipework upgrades.

Compact electric boilers hang neatly within a standard kitchen cabinet or utility cupboard. Air-source systems demand dedicated external clearances and indoor unvented cylinder storage.

Heat pumps generate three to four units of thermal energy per unit of power via high COP ratings, while electric boilers operate at 99% direct efficiency paired with dynamic electric tariffs.

Battery Storage & Smart Tariffs

While heat pumps leverage ambient air heat, electric boilers can be integrated with domestic battery storage systems and solar arrays. By charging high-capacity home batteries during cheap overnight off-peak hours, you can run high-draw heating cycles on low-rate power throughout the day.

This combination offsets the higher nominal unit cost of electricity, delivering an exceptionally quiet, compact installation with predictable seasonal heating expenses.