Are Heat Pumps Cheaper than Gas Boilers?

For homeowners in Kent, Sussex, and the wider South East, switching from a gas boiler to a heat pump is becoming a serious consideration. But when it comes to cost, which one really comes out on top?

While heat pumps tend to be more expensive upfront, they can be significantly cheaper to run over time - especially if you’re staying in your home long term. Let’s take a closer look.

Installation Costs – What You Can Expect

Heat Pump Installation

Installing an air source heat pump typically costs £10,000–£16,000, with ground source systems starting higher due to additional groundwork. But with the £7,500 Boiler Upgrade Scheme and 0% VAT on installation until 2027, upfront costs are much more manageable.

This is particularly attractive to homeowners in Kent and Sussex who are planning future-proof home upgrades.

Gas Boiler Installation

Gas boiler installations usually cost around £2,500–£5,000. While cheaper initially, they don’t qualify for the same level of grant support, and running costs can stack up over time.

Running Costs – The Long-Term View

Heat pumps are far more efficient than gas boilers. While gas boilers run at around 90% efficiency, air source heat pumps can achieve 300–400%, generating 3 - 4 units of heat for every unit of electricity used.

If your home in Kent or Sussex is well insulated, you could see real savings on your annual heating bills - particularly if you’re switching from an older boiler or oil system.

Typical Savings

Replacing a G-rated boiler with a heat pump can save up to £1,000 per year, according to the Energy Saving Trust. Even when replacing a newer boiler, many households find the long-term savings justify the investment.

Maintenance and Lifespan

Heat pumps require less ongoing maintenance than gas boilers and typically last longer- 15–20 years compared to 10–15 years for a boiler.

At Wells Renewables, our service teams operate across Kent and Sussex, offering ongoing support and advice once your system is in place.

The Bottom Line: Are Heat Pumps Cheaper?

While heat pumps aren’t the cheapest option upfront, the combination of lower running costs, government grants, and long-term efficiency often makes them the more cost-effective choice.

For homeowners in the South East, especially those planning to stay put and reduce their carbon footprint, heat pumps are proving to be a smart, sustainable upgrade.