Unheated swimming pools are all well and good if you only use it in the summer, are happy to brave the UK weather or you live in the Caribbean. Otherwise you could find the water getting a little... frosty. Water Garden Ltd offer a range of energy-efficient Air Source Heat Pumps, from raised �pop-up� pools to permanent installations for maintaining the water temperature at a fraction of the running costs associated with traditional heater elements. Air Source Heat Pumps utilise the surrounding air to convert to heat, meaning that for every Kilowatt of energy put into the system, up to 7 Kilowatts of energy can be released to heat your swimming pool.