Air Source heat pumps are one of the best ways to slash your energy costs, reducing your hot tub or swim spa running costs by an average of 50%. By taking thermal energy from the air and using it to heat your hot tub’s water, they can produce four times more heat energy than they use in electricity, regardless of the outside air temperature. Inverter technology means the fan doesn’t need to run often, as it keeps the temperature consistent. Not only that, but they are a more eco-friendly way of running your spa and can heat water quickly, making them great for holiday lets as well as personal use hot tubs.