This is another award-winning air source heat pump, with at 7kW, a just slightly lower output than it’s award-winning 9kW relative. The Aquark is also acknowledged as being one of the quietest (40dB, or similar to the hum of a refrigerator – normal conversation is between 50-65dB, which gives you an idea of how quiet it is) in the hot tub and swim spa market, wonderful if you listen to music while relaxing. This is enabled though Aquark’s unique airflow design.

Two of the main features of an air source heat pump is that they are far cheaper to run than a traditional hot tub or swim spa water heater, and also much kinder to the environment. The Silence range is not only as it names suggests, “silent”, but has at its heart the industry’s leading efficient Stepless DC Inverter control system with its unique and patented InverPad technology.

For the Aquark Silence 7kW, the energy saving performance is at an astounding COP (the official measurement of its “Coefficient of Performance”) return of up to 14, meaning that you get 14 times the energy (heat) out of the unit than you have to put in to run it. No mean feat in these times of high energy bills. You can save up to 65% on your energy costs.

The Aquark Silence has what is termed a “smart conversion compressor, fan motor and pressure system”, to provide its amazing energy saving performance. Like all air source heat pumps, it takes in the ambient air, sends it over the evaporator coil of the air pump, the built-in heat exchanger transfers the heat which then heats up the hot tub or swim spa’s water, and the process starts over again.