Range of unvented heat pump storage cylinders which consist of an air-source heat pump sitting on top of the tank with either no internal coil (model numbers ending without S) or a factory fitted single internal coil (model numbers ending with S). The secondary circuit is factory fitted with a temperature and pressure relief valve set at 7.0 bar @ 90˚C and an stainless steel immersion heater and titanium alloy anode. The product is not supplied with an inlet control group (safety kit). Maximum operating temperature 70°C. Maximum working pressure (primary & secondary circuit) 5.5 bar.
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