Passion Spas are among the most energy-efficient spas in the world. To enhance this, the optional All-Weather heat pump is compatible with every Passion Spa. A normal heat pump is designed to extract heat from the air in the summer. The unique Passion Spas All-Weather heat pump is specially designed to extract heat from the air all year round, in both summer and winter. It even works down to -20 degreesCelsius. This saves you enormously on the required power. And in the summer you can also use this device to cool your spa water. You can continue to set your desired temperature via the normal topside display, making your spa easy to control. The Heat pump is exactly the same color as the dark gray Passion Spas cabinet and can be used as a step as an added advantage. All in all, the Passion Spas All-Weather heat pump is the addition that you need to choose, that will ensure that your spa will be extra energy efficient, so that you are a good steward of your budget and the environment.