The cost of swimming pool heaters in the UK varies based on the type of heater, its size, and installation requirements. Generally, the costs can be broken down as follows:

• Electric Heat Pumps: £1,500 to £4,000 plus installation costs of £300 to £1,000.
• Gas Heaters: £1,200 to £3,000 plus installation costs of £300 to £1,000.
• Solar Heaters: £2,000 to £6,000, with installation costs typically included. Additionally, ongoing operating costs vary, with gas heaters being the most expensive due to fuel costs, followed by electric heat pumps, and solar heaters being the least expensive to operate.

Swimming pool heaters function by heating the water that circulates through them. There are different types of pool heaters:

• Gas Heaters: Use natural gas or propane to heat the water. The water passes through a combustion chamber where it is heated by burning gas and then circulated back into the pool.
• Electric Heat Pumps: Draw in warm air from the environment and use a compressor to heat the pool water. They are energy-efficient and work best in warmer climates.
• Solar Heaters: Use solar panels to collect heat from the sun and transfer it to the pool water. They are environmentally friendly and cost-effective but depend on the availability of sunlight.