Hydropro make 3 ranges of heat pumps for heating swimming pools with the standard range being the most popular. This range is ideal if you use your swimming pool in the UK from March through to the end of October. The range starts with the Hydropro 7 model and goes up in size to the Hydro pro 26 model rated at 26 kilowatts heating output. Heating a swimming pool can become very costly if you are using an electric only heater, whereas using a heat pump designed for heating swimming pools can on average reduce electricity costs by 75%. Most UK swimming pools have around 50 cubic metres of water in with the Hydropro 13 model being ideal for this size of pool.