Pool Heating near you

An air source heat pump serving a pool is still an air source heat pump on domestic premises, so the permitted development conditions apply to it as they do to one serving the house. The Planning Portal sets out the current position for England: development is permitted only if the installation complies with the Microgeneration Certification Scheme planning standard MCS 020 a); the outdoor compressor unit including its housing must not exceed 1.5 cubic metres on a house or 0.6 cubic metres for a block of flats; only the first installation is permitted development on a house which is not detached, or on a block of flats, while detached houses may have the first two.

The siting conditions are the ones that most often bite on a pool project, because pool plant tends to be at the far end of a garden or on a flat roof. Installations on pitched roofs are not permitted development, and where a pump is installed on a flat roof all parts of it must be at least one metre from the external edge. Permitted development rights do not apply within the curtilage of a listed building or on a site designated as a scheduled monument. In a conservation area or a World Heritage Site the pump must not be installed on a wall or roof fronting a highway, or be nearer to a highway bounding the property than any part of the building. There is also a condition that the unit is not used solely for cooling, and one requiring removal as soon as reasonably practicable when it is no longer needed for microgeneration, and development is only permitted where there is no existing wind turbine on the building or within the curtilage.

The MCS standard is worth understanding rather than treating as a box. MCS published an updated version split into MCS 020 a) for air source heat pumps and MCS 020 b) for wind turbines, with an updated calculation methodology for air source heat pumps, and MCS has stated that from 28 May 2026 MCS 020 a) will be the only permitted certification scheme. In practice the standard is about the sound the unit makes at a neighbour's assessment position, which is exactly the argument a pool heat pump running on a still summer evening is most likely to start.

The awkward fact about air source heat pumps on pools is that their efficiency falls as air temperature falls, which is precisely the condition in which you want to extend the season. A heat pump sized for a warm July will disappoint in May and September. Sizing it for the shoulder months costs more up front and is usually the right call, because those are the weeks the heating is buying you.

Boilers behave in the opposite way: recovery is fast and largely independent of the weather, which suits a large pool, a pool that is used intermittently or a pool that has to come up to temperature before guests arrive. The trade-off is running cost and the fact that gas work is reserved by law to Gas Safe registered engineers, so the installation involves a trade the pool firm probably does not employ.

Ground and water source systems change the economics again and are normally considered permitted development on domestic premises in England, though the Planning Portal notes that since 1 October 2023 an Environment Agency permit may be needed for new ground source heat pump installations. That is a question to settle at design stage rather than after a borehole contractor is booked. Solar is best understood as a way of reducing what the main heat source has to do in midsummer, not as a way of starting the season earlier.

Most of the heat a pool loses goes off the surface, through evaporation more than through conduction, so the single most effective thing you can do is keep the surface covered whenever nobody is in the water. In a British spring and autumn, where nights are cold and the air is often moving, an uncovered heated pool is heating the garden.

Shelter is the next lever and it is free once. A pool exposed to prevailing wind loses heat faster than a sheltered one, and hedging, fencing or a planted windbreak on the exposed side changes the running cost permanently. This is worth designing in during a renovation rather than adding later.

Finally, be honest about the target temperature. Every degree of set point costs money continuously, not just once, and a pool held a couple of degrees warmer than it needs to be through a whole season is a substantial and invisible expense. Deciding a realistic set point, and using a cover, will do more than any argument about which heat source is best.

The installed price turns on the heat source chosen and how far it has to reach. What moves it is the volume of water and the temperature you want to hold, whether the pool is indoors, outdoors, sheltered or exposed, how much pipework and electrical supply has to be run to the plant position, whether a new circuit or a supply upgrade is needed, whether the siting conditions for permitted development are met or an application is required, and whether a cover forms part of the scheme. Running cost then turns on the set point, the season length, the cover and the shelter far more than on the brand of equipment.

LokalMatch's part is putting the request in front of the right installers. Describe the pool, where the plant can go and how you want to use the season, once, with your postcode, and heating installers covering your area will contact you themselves. Homeowners are not charged anything; pros pay for the enquiries that come to them. LokalMatch does not install heating, does not influence what anyone quotes, and does not vet, rank or recommend the businesses that respond, so confirming MCS compliance, gas registration and who applies for any permission stays with you.