AQUARK Mr.Silence Air Source Heat Pump for Hot Tubs & Swim Spas (7kW–21kW) – Mitsubishi Inverter, Ultra-Quiet, Titanium Exchanger

Delivery & site preparation

• Standard delivery: Free standard delivery is included.
• Installation: Installation is not included unless clearly stated on the product page. Heat pumps should be installed by a suitably qualified installer.
• Site requirements: Please allow appropriate clearance, airflow and access for servicing before delivery.
• Electrical / plumbing: Any electrical connection, pipework and commissioning should be completed by a qualified professional.

Powerful heating that doesn’t dominate your garden. The AQUARK Mr.Silence range is built for spa owners who want efficient heating with a quieter, smoother experience. It’s an air source heat pump solution designed to reduce hot tub heating bills while keeping water temperature stable — so your tub feels ready more often.

Works all year round: the range is listed to operate down to -10°C external temperature. At the heart of the system is a Mitsubishi DC twin-rotary inverter compressor, designed to modulate output for steadier performance and reduced noise versus traditional on/off operation.

Premium internals for spa conditions. The heat exchanger is listed as twisted titanium, a common choice for durability in spa water environments.

Pick the kW size to match your setup: choose a smaller unit for efficient maintenance heating, or go larger for more headroom and faster recovery after use.

Technical specifications

• Options: MS70 (7kW), MS90 (9kW), MS110 (11kW), MS210 (21kW).
• Operation down to -10°C external temperature (as listed).
• Compressor: Mitsubishi DC twin-rotary inverter compressor (as listed).
• Heat exchanger: twisted titanium (as listed).
• Performance (Air 27°C / Water 27°C / RH 80%) for MS70/MS90/MS110: COP range 14.0–7.1 / 14.0–7.1 / 14.0–6.9; average COP at 50% speed 10.4 / 10.4 / 10.2 (as listed).
• Performance (Air 15°C / Water 26°C / RH 70%) for MS70/MS90/MS110: COP range 7.2–4.4 / 7.3–4.7 / 7.3–4.6; average COP at 50% speed 6.4 / 6.4 / 6.5 (as listed).
• Weights (MS70/MS90/MS110): 54kg / 55kg / 57kg (as listed).
• Dimensions (MS70/MS90/MS110): 890 × 430 × 657 mm (as listed).