Twin coil indirect water heater

The THERMALINO twin coil cylinder is an indirect water heater that stores domestic hot water and heats it through two separate coils, so two heat sources, such as a heat pump and a gas boiler or solar collectors and a boiler, can be connected without their circuits mixing. It comes in sizes from 100 L to 3000 L, for a maximum operating pressure of 10 bar and a maximum operating temperature of 95 °C.

The twin coil cylinder from the THERMALINO Eternal line keeps a large volume of domestic hot water ready for use at all times. Water from a heat source flows through a coil inside the tank and heats the stored water indirectly. The two coils are fully separate, so two different sources, for example a heat pump and a gas boiler, can each heat the same stored water without their circuits ever mixing. The inside of the tank has an epoxy resin coating approved by WRAS to BS 6920-1, so the water is safe for drinking water installations. It is supplied with a magnesium anode for extra corrosion protection and a pressure gauge already fitted. Rigid PU foam insulation keeps heat losses low, and the casing is navy. The tank's maximum operating pressure is 10 bar, its test pressure is 13 bar, and its maximum operating temperature is 95 °C. The cylinder works with heat pumps, gas boilers and solar thermal systems. As a solar hot water storage tank, it holds the heat the collectors produce during the day, and the second coil lets a boiler or heat pump top the water up when solar output falls short. An external electric heater can also be connected as a further back-up, which helps in areas without mains gas. Sizes run from 100 L to 3000 L, which covers anything from a single home to the shower demand of a hotel or hospital. A cleaning flange gives access to the inside of the tank for periodic cleaning and maintenance. Connection positions, coil data and dimensions for each size are in the technical data sheet. Installation and commissioning are carried out by a qualified installer.