Twin coil indirect water heater without cleaning flange

The twin coil indirect water heater stores domestic hot water heated by two separate sources, such as a heat pump and a gas boiler or solar collectors, through two coils that keep the heating circuits apart. Its WRAS BS 6920-1 approved epoxy resin coating makes it suitable for drinking water installations, and it comes in sizes from 100 L to 3000 L.

The twin coil indirect water heater is a storage tank that heats domestic hot water indirectly. Water from a heat source circulates through a coil inside the tank and passes its heat to the stored water without the two mixing. Because it has two coils, the tank can be connected to two different heat sources at once, for example a heat pump and a gas boiler, or solar collectors and a boiler. Each source has its own circuit, so the circuits never mix. The inside of the tank is protected by an epoxy resin coating approved to WRAS BS 6920-1, which makes it suitable for drinking water installations. A magnesium anode and a pressure gauge come fitted as standard, and an electric heating element can be connected as an additional heat source. The tank is insulated with rigid PU foam or soft foam. It has a maximum operating pressure of 10 bar and a test pressure of 13 bar, and its maximum operating temperature is 95 °C. This version has no cleaning flange. This water heater is made for buildings that need a lot of hot water at the same moment, such as hotels, hospitals and schools where many showers run at once. It also suits large villas, mountain houses and holiday homes with several bathrooms. In areas without a gas supply, it lets you prepare and store hot water from whatever heat sources are available. The Smart line range runs from 100 L to 3000 L. Coil data, connection sizes and dimensions for each size are given in the technical data sheet. A qualified installer connects the tank to the heating circuits and the water supply.