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Comparison Grunhelm GH-3HW vs Grunhelm EWH-3G

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Grunhelm GH-3HW
Grunhelm EWH-3G
Grunhelm GH-3HWGrunhelm EWH-3G
Outdated ProductOutdated Product
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Typeinstant tapinstant tap
Energy sourcemainsmains
Technical specs
Power source230 V230 V
Power consumption3000 W3000 W
Max. water temperature60 °C60 °C
Water supplywith pressurewith pressure
Heating elements1
Heating element type
heating coil
heating coil
Features
Functions
thermostat
thermostat
Safety systems
overheat protection
dry heating protection
overheat protection
dry heating protection
General specs
Controlsmechanicalmechanical
Controls layoutsideside
Pipe connectionbottombottom
Added to E-Catalogaugust 2019april 2018

Heating elements

The number of heating elements provided in the design of the water heater. In this case, it is the total number of elements that are taken into account, regardless of whether they belong to the same type or different ones: for example, 2 heat exchangers and 1 heating element are considered as 3 elements.

All gas models (see "Energy source") have only one heating element — this is quite enough for efficient operation. In combined devices (see ibid.), on the contrary, there are several heating elements by definition (at least two — a heat exchanger and an electric one). In electric and indirect water heaters, the options may be different.

The meaning of several heaters of the same type is primarily to increase the heating efficiency. For example, in an instant (see "Type") electrical water heater, in this way, it is possible to increase the working length — the distance that water passes inside the device from inlet to outlet; by increasing the working length, the water is heated longer. In storage electric models, several heaters provide more uniform heating of the water, and in indirect ones, they allow more heat to be taken away. In addition, in indirect devices, heat exchangers can differ in the source of heating: for example, one can work from a heating boiler, the second from a solar collector.

Also, note that duplication of heating elements can also be used as protection against failures: if one of them...fails, the heating efficiency decreases, but the device remains operational. However, this possibility is not available in all models with several heaters, its presence should be clarified separately.
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