Swimming Pool Boilers

Central Heating Installers Guildford, Surrey
Swimming Pool Boiler Installation and Maintenance


To make the most of your swimming pool, you’ll need to heat the water to an average temperature of 28°C. There are various ways to heat pools such using heat pumps, solar thermal, electricity, gas, LPG or oil boilers.

Why not call us today to see how we are able to help with your heating of your swimming pool, whether it be installation or maintenance of air source heat pumps, gas, LPG or oil boilers.

Swimming Pool Heat Pumps:

Pool heat pumps are one of the cheapest and more environmentally friendly ways to heat your pool all year round. They heat the pool slowly and usual take a 3-5 days to get up to temperature, but they are designed to be left operating 24 hours a day, so just topping up the pool water temperature.

A good quality and correctly sized swimming pool heat pump will typically save between 30% and 50% (in many cases more), of the heating fuel costs for an outdoor or indoor pool that is used from April to October in the UK. This means the cost of the unit is normally recovered within 4 years of operation and its saving you money for a lifetime thereafter.

On average Air Source Heat Pump’s are around 500% efficient at heating up swimming pools, this means for every 1kw of electricity used it can produce 5kw’s of heat. Depending on the ambient air temperature they can be even more efficient. When compared to gas or oil boilers, which operate at about 92% efficiency, you can see that huge savings on heating costs can be made.

A very important factor for a heat pump to effectively work is to have a good insulated pool cover and for the pool not to be sited within a high water table area.

When we get hot summers, the savings could be even greater, as the performance efficiency of a heat pump is dramatically increased as the air temperature increases. For example, if the air temperature is 15 degrees or over, £1 of electricity is converted to £5.50 of heating energy.

To work out how quickly it will take for a heat pump to pay for itself, work out your annual pool heating costs and take about 40% and compare this to the cost of an appropriate sized quality heat pump from Calorex.

If you plan on using your pool during the colder months of the year, you need to be aware that a normal air source heat pump is only efficient at certain temperatures (generally 10 degrees or above), so you will either need to have an alternative heat source (such as an oil or gas boiler) or you’ll need to invest in an something like a Calorex Y series ProPac all year heatpump. This would need to be sized and correctly specified for your project by Azure Pools, which are more expensive than normal heat pumps but are capable of working at very low temperatures. To find out more about the temperature at which swimming pool heat pumps will work, please click on the link below.

They can also be fitted and used in conjunction with a gas, LPG or oil boiler if required. The heat pumps we would recommend are either:

Calorex V-Pac (inverter pump)

Dantherm HPP

How it works:

Indirect Pool Boilers

Standard boilers, such as Worcester Bosch, can be used to indirectly heat a separate heat exchanger, such as Bowman. This method requires a little more space, due to few items being required, but the boilers can also be used to generate heat for other systems like heating and hot water for your home, changing rooms or summer house.

Direct Pool Boilers

These boilers are directly connected to the pool water and have all the controls built in. They cost more to install and maintain than an indirect boiler system and can only be used to heat the pool water. The benefit of this type of boiler is the faster reheat times, if you only need to heat the pool occasionally then these boilers may be the best option. Typical manufacturers include Certikin and Laars.

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