Gas vs Electric Boilers — Pros, Cons & Costs (2025 Guide)
Choosing between a gas boiler and an electric boiler in 2025 depends on your home setup, energy usage, and sustainability goals. At ARA Services Ltd, we install both systems across London and help homeowners select the most cost-efficient and eco-friendly option. Not sure which type suits you best? See our guide on Combi vs System vs Regular Boilers.
Gas vs Electric — What's the Difference?
Gas boilers burn natural gas or LPG to heat water through combustion. Electric boilers use heating elements powered by electricity — no combustion, no flue, and no emissions on-site. Discover how efficiency compares in Are High-Efficiency Boilers Worth the Investment?
Request a Free QuoteComparison Table — Gas vs Electric Boilers (2025)
Pros and Cons of Each Boiler Type
Gas Boilers — Advantages
- Lower running costs than electricity (per kWh).
- Powerful enough for large homes with multiple bathrooms.
- Widely available replacement parts and service engineers.
Electric Boilers — Advantages
- 100 % efficient — all energy converts to heat.
- Compact, quiet, and no flue or ventilation required.
- Zero carbon emissions on-site (ideal for eco homes).
Gas Boiler — Drawbacks
- Produces CO₂ and requires flue installation.
- Needs annual Gas Safe servicing — see how often to service your boiler.
- Less efficient than electric in small homes or flats.
Electric Boiler — Drawbacks
- Higher running costs (electricity is more expensive).
- Less powerful for larger properties with high demand.
- May require electrical system upgrades.
Which Boiler Is Best for You?
For most UK homes on the gas grid, a modern condensing gas boiler offers the best mix of power and affordability. If your property is off-grid or you're aiming for a low-carbon footprint, an electric boiler is a clean, future-proof option. Learn about current boiler installation grants & government schemes that may offset costs.
To estimate real-world pricing, visit How Much Does a New Boiler Installation Cost in 2025? and check out the best boiler brands for 2025 for reliability and warranty options.
Related Boiler Guides
FAQs
Are electric boilers cheaper to run than gas?
No — electricity costs more per kWh, so gas boilers are typically cheaper to run.
Compare efficiency figures in Are High-Efficiency Boilers Worth the Investment?.
Are electric boilers more efficient?
Yes, electric boilers are nearly 100 % efficient, but the energy cost can still be higher overall.
See How to Save Money on Heating Bills with a New Boiler.
Which is better for the environment?
Electric boilers produce zero on-site emissions and are greener when powered by renewable electricity.
You may also qualify for government grants under ECO4 or BUS.