Small water heaters, wall and floor mounted cylinders – For professionals

Sealed unvented (pressurised) DHW cylinders are not open to the atmosphere. During the heating process, the water inside the cylinder expands. The excess water is drained off via the installed safety assembly.

With some small water heaters, the anti-drip function, for example, prevents water from dripping out of the tap when the water in the small storage tank is heated. The expansion water enters a special reservoir, pressing the expansion diaphragm together. The next time water is drawn off, the container is drained via a venturi nozzle and is ready for the next heat-up process. The anti-drip function saves water and prevents limescale build-up on the tap and the sink/basin.

Water heaters with a pressurised inner cylinder can supply several draw-off points. We have different appliance sizes to choose from for this purpose. Depending on your project, you can choose between appliances with different storage capacities in the small water heater product group. They keep hot water available constantly at the required temperature of between 35 °C and 85 °C and with low standby energy consumption.

The thermal insulation between the inner tank and outer jacket meets the requirements for energy efficient operation. Mount such appliances on a wall near to the draw-off points used most frequently, to prevent unnecessary losses. Tip: reheating sizeable quantities of water takes some time. So that your customers always have hot water available, we recommend that you always match the appliance size to their maximum demand. Depending on the appliance type, the inner tanks are made of steel with an enamel coating on the inside and feature an anti-corrosion rod or impressed current anode, or are made of copper. Benefit for your project: this makes our DHW cylinders particularly durable.

The required safety equipment is specified in DIN 1988. Thermostatic and mono lever mixer taps can be installed at the draw-off points.

Open vented (non-pressurised) DHW cylinders have capacities from 5 to 80 litres. They are available as undersink or oversink versions, supply one draw-off point (individual supply) and keep hot water available constantly at the required temperature of between 35 °C and 85 °C. Good thermal insulation makes a major contribution to their overall efficiency.

Floor mounted cylinders with 200 – 1000 litre capacity are used to cover high hot water demands of several hundred litres. The water is generally heated at off-peak times (economy tariffs). The cylinders keep hot water constantly available at the required temperature of between 35 °C and 82 °C.

The inner tanks are made from enamelled steel with an anti-corrosion rod. A flanged immersion heater is fitted as standard. Floor mounted cylinders are either supplied with pre-applied foam insulation or have a thermal insulation jacket fitted on site. This insulation is designed to minimise heat losses. The appliance’s location should be selected so that the draw-off points at which small amounts of hot water are often required, can be supplied via a short DHW run.

If the cylinder size calculation results in a borderline case, always select the next largest cylinder size.