Pool Heaters: What is the best pool heater or heating solution?

By Blue Cube on Thursday, 29th Mar 2018 in News.
What is the best heater for a pool
What is the best pool heater?

Below we discuss pool heaters, which one is right for you, how much they cost to run and their pros and cons.

  • Electric Heaters work by an electrical current being applied to the element which generates heat, water then flows over the heating element and heats the water which is then transferred back into the pool. Electric pool heaters are suitable for both in-ground and above ground pools, indoor and out. Smaller above ground pools usually use electric heaters as they do not require a large heat source. An electric pool heaters efficiency level will remain reasonably constant as they are not affected by air temperatures unlike an air source heat pump. Electric pool heaters cost from £134 to around £7,180.00. Click here to view our selection.

best pool heaters

  • Gas Heaters running costs will depend on the cost of your gas supply, they offer one massive advantage in comparison to other pool heat sources, they provide almost instant heat. The combustion of the gas creates instant heat which will therefore start to heat your pool quickly which is an excellent choice for people who do not use their pool regularly. As they rely on gas to provide heat they are not affected. It is suggested that the COP of gas heaters is quite poor therefore the prices in our table are basic estimates based on an average UK gas price but could be higher depending on the gas heater chosen and they are considered the least eco-friendly pool heating option. They work in a comparable way to electric heaters, the water passes over the combustion chamber where the heat is produced, the heat is transferred to the water and it is then passed back into the pool. Gas pool heaters cost between £2214 to £3947. Click here to view our selection

 

  • Oil Heaters are like gas heaters as they burn the oil which produces heat which is then transferred to the water either directly or via a heat exchanger. An oil pool heater is worth considering if your household heating is also run off oil, however in recent months the prices of oil have risen as it is not a renewable energy source. Some clients have chosen to implement an oil heater alongside an electric heater which they run during off peak hours to maintain temperature levels, similarly to a gas heater an oil heater will produce almost instant heat which makes. They are fairly economical to run however this depends on the cost of your oil so it is worth stocking up when prices are low (usually the summer). One draw back which is the same as a gas heater is it needs to be installed by a professional and service work may be costly. Oil pool heaters cost between £3399 to £5249. Click here to view our selection.

 

  • Best heating solution for a poolHeat Pumps work by moving the water into the heat pump via the filtration system, the heat pump takes air from the outside. Then the refrigerant in the evaporator coil takes heat from the air and turns it into gas, the gas goes through the compressor which raises the temperature of the gas, this hot gas then goes through the condenser and transfers the heat into the water which then goes back into the pool. Heat Pumps have a great COP which means you get more for your money, for example a COP of 3 means for every £1 you spend you get £3 worth of energy , making them an excellent solution for saving money and being eco-friendly. Due to the fan element they can sometimes be noisy but recent technological advances have been working to tackle this and some heat pumps are now incredibly quiet. One disadvantage is a heat pumps COP and heating ability is affected by the outside air temperature, during the summer months it works very well, and most heat pumps now operate down to -5oc, but the cop will always be higher than other pool heating options. A heat pump will usually cost more than an electric heater, but an electric heater will cost more to run, so the question is? Can you afford the initial outlay to save money and be more eco-friendly in the long run? Typically heat pumps are used for outside pools but can also be used inside. For more information contact one of our expert advisers. Heat Pump pool heaters cost from around £590 to £7000. Click here to view our selection.

 

In an ideal world the heat you put into your pool would stay there, unfortunately this is not the case. With an insulated cover you can reduce heat loss but with an outside pool you will find your pool loses quite a bit of heat. Your heater will have a thermostat which will keep your pool at a constant temperature, they usually start running after they detect around a 1-degree change.

Average Running Costs of Pool Heaters:

Below we have detailed some energy consumption examples based on pool size running from May to mid-September.

Pool Size (ft) KW Required per day KW Required per season
12’ round 9.3 1256
15’ round 18.6 2512
18’ round 29.1 2925
12’ x 24’ 46.5 6280
15’ x 30’ 74.4 10048
20’ x 40’ 116 15700

 

These figures are based on a 1-dgree loss per day and will vary depending on type of pool. Below we have calculated the costs based on current energy prices. These do not include daily standing charges, this is to show you a price comparison between heat sources and costs. The COP measures how much heat is generated for each kw of electricity input. For example, a COP of 2 means that that 2kw of heat have been generated for every 1kw of electricity input. COP will change depending on outside air temperatures therefore the costs below are calculated assuming a constant COP of 3. But as you can see it is still cheaper to run a heat pump then an electric heater, but a gas heater is the next best solution. However, one thing to bear in mind is the rise of gas and oil prices over the next few years.

KW Required Per Season Electric @ 17p per kw Gas @ 6p per kw Oil @ 7p per kw Heat Pump @ c.o.p of 3
1200 £204 £72 £84 £68
2500 £425 £150 £175 £141
4000 £680 £240 £280 £266
6000 £1020 £360 £420 £340
10000 £1700 £600 £700 £566
15000 £2250 £900 £1050 £750

Below is an example of energy usage by Bosta who manufacture the Hydro Pro Heat Pumps.

Type                     Size      COP A27/W27     Heating capacity (A27/W27)       Power Usage  (Kwh)

Heat Pump         10kw                     13                                            10                                          1.5 kwh

Electric                10kw                     1                                              10                                           10 kwh

A = Air W= Water

You can see in the final column that it only costs approximately 1.5kwh of electricity per hour to run a heat pump but you can get 10kw worth of and just heat whereas an electric heater requires you to pay for 10kw of electricity per hour to generate the same amount of heat. Electricity costs approximately £0.15 p/h therefore you are paying £1.50 p/h for an electric heater and just £0.22p for a heat pump.