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Expert Plumbing & Heating Advice

Air Heat Pumps vs Boilers

For decades, gas boilers have kept homes warm, delivering clean, simple and cost-effective heating. However, as environmental concerns develop, heat pumps have emerged as a more environmentally friendly option. This guide analyses both options so you may make an informed decision about your property.

Key Takeaways

  • Gas boilers offer proven reliability and quick installation
  • Heat pumps provide greener heating with 20+ years lifespan
  • £7,500 government grant makes heat pumps available from £499
  • Average heat pump installation costs £4,415 after grant
  • Both systems offer smart controls and reliable heating

heat pumps vs boilers

Boilers vs Heat Pumps: The Ultimate Guide

How Do They Work?

Gas Boilers

Gas boilers burn natural gas to heat water and provide hot water via storage tank or on-demand (combi). They offer several advantages, including affordability, easy installation, and proven reliability.

Heat Pumps

Heat pumps operate on electricity, extracting warmth from the outside air and compressing it to raise the temperature. This heated air is then used to warm stored water for home use. Their main benefits include lower carbon emissions, superior energy efficiency, and an extended lifespan.

Installation Process

Gas Boiler Installation

Gas boiler installation is typically completed in one day with a straightforward replacement process and minimal disruption to your home. The cost varies depending on boiler size, type changes (such as switching from conventional to combi), and any location changes required.

Heat Pump Installation

Step 1: Survey

The expert assessment process includes a thorough evaluation of your property size, current insulation levels, household occupancy, and system sizing requirements. This survey also determines any necessary changes to radiators or pipework.

Step 2: Installation

Heat pump installation takes approximately one week and is more complex than a boiler installation. Your property may require larger radiators, wider pipework, or additional insulation to ensure optimal performance.

Costs Breakdown

Gas Boiler Costs

Installation costs range from £2,750 to £5,000. The final price depends on your system size, boiler type, installation complexity, and any location changes needed.

Heat Pump Costs

With the current £7,500 government grant, heat pumps are available from £499. The average cost after the grant (October 2023-February 2024) is £4,415. Your final cost will depend on required home improvements, insulation needs, and radiator upgrades.

Running Costs and Efficiency

Operating Differences

Gas boilers provide quick bursts of high heat (70°C-80°C) and work well even in less insulated homes. While less efficient, they benefit from cheaper fuel costs.

Heat pumps deliver steady, lower heat (35°C-55°C) and require good insulation. They offer greater efficiency but run on more expensive electricity.

Cost Comparison

Heat pumps typically cost similar or slightly less to run than gas boilers, with home insulation being the key factor. Although electricity costs four times more than gas, the higher efficiency of heat pumps helps balance overall running costs.

Environmental Impact

Heat pumps represent a significantly greener heating solution. With 38.2% of UK electricity now coming from renewable sources (2023), they become increasingly environmentally friendly as the grid gets cleaner. Homeowners can pair them with solar panels for zero-carbon heating, supporting the government's net zero 2050 target.

Comfort and Control

Both systems provide comprehensive control options, including smart thermostat compatibility, mobile app control through systems like Hive, straightforward temperature management, flexible scheduling options, and energy usage monitoring.

Reliability and Maintenance

Gas Boilers

Gas boilers require annual servicing and regular maintenance throughout their 10-15 year average lifespan. They benefit from readily available repair services and optional HomeCare cover for peace of mind.

Heat Pumps

Heat pumps need only simple annual servicing and offer minimal maintenance requirements throughout their 20+ year lifespan. The technology is reliable and professional servicing is available when needed.

When choosing between a gas boiler and heat pump, consider your home's insulation levels, installation budget, environmental priorities, available space, current system age, and long-term plans.

Heat Pump vs Gas Boiler Comparison

Feature Gas Boilers Heat Pumps
Powered by Natural gas Electricity
Starting cost From £2,750 From £499 (with £7,500 grant)
Energy savings Up to £415/year Up to £385/year
Efficiency At least 90% Up to 380%
Carbon footprint High Low
Installation time One day One week
Lifespan 10-15 years 20+ years
Warranty Standard warranty 5 years (British Gas)

*Costs and savings are estimates based on average UK household usage

Get in touch with expert heating engineers

For personalised advice, get a professional assessment of your property to determine the most suitable heating solution for your needs by calling our heating engineers in Liverpool, St Helens, Warrington and Widnes on 07423397737.

Need help deciding? Get a free assessment to explore your options and potential costs.