WaterStillar Wall

$ 2,218 excl. VAT ($ 2,773 incl VAT)

Our compact and electrical solution: 85 liters hot bathing water and up to 15 liter of drinking water per day.

WaterStillar Wall is a combination of an electrical traditional water heater and a distillation apparatus. Wall meant for homes in non-sunny areas of the world and for homes with no access to the sun. Wall is a combination of a distillation apparatus and an electrical water heater, where the distillation process is used to heat bathing water. The heat from the electrical heater is used to evaporate water and this vapor is condensed up against the bathing water tank, giving back the heat energy to the bathing water. Two in one.

Wall will fit most families needs for both drinking water and hot bathing water. The 85 liters does not sound much, but the combination of the high temperatures in the bathing water tank and the mixing valve means that the outgoing hot water at the 35-60C is much more. The very hot water from the tank is simply mixed with cold water before the water leaves WaterStillar Wall. In this way, WaterStillar Wall can be compared to traditional water boilers that are 20-50% bigger in volume. This depends on the outgoing temperature you choose and the temperature of the cold water you mix with.

The minimalistic design reflects our Danish heritage. The colour is matte white.

Functional design features

  • No moving parts, besides a valve that fills the boiler with feed water.
  • Air and vapour tight design that ensures a sterile environment
  • Compact (will fit in a 60 cm wide closet)
  • Made from food-grade stainless steel, not causing problems with approvals and no need for anodes
  • Thicker insulation (up to 60mm) – less energy loss
  • No noise

Technical headlines

Working principle and efficiency

WaterStillar Wall distills water at a ratio of 1:1 and is therefore not more efficient than a normal distilling device. The trick is that the initial energy consumption is used twice and the second “effect” is free: you pay electricity for drinking water, but gets hot bathing water as a nice, free bi-product. Or vice versa. And you have only one devise, not two. Your kitchen tabletop can then fit all the other devices, we all have there.

As WaterStillar Wall is an on-demand system it is the only device in your home that you need to have bathing and drinking water all year round.

Installation and maintenance

Wall is very compact and will fit in most apartments/houses. The inbuilt drinking water tank can be connected to a dispenser, the fridge or simply a drinking water tap in the kitchen.

Wall is using a smaller electrical heater than traditional water heaters and is only available in 230V for now. The heater is controlling the feed water temperature and is working 24/7 to provide enough distilled water for drinking purposes. Total energy consumption is the same as in conventional water heaters for the same amount of hot water.

Wall is fitted with a mixing valve, a security valve and a carbon/calcium filter and is ready to connect to the water line and the hot water line in your house/apartment. The system is pressure tested when leaving our factory and all you need is to connect hot/cold water to your home – and have a single phase 230V power outlet close by. Installation should be done by a certified plumber, but you can do it yourself (local legislation may differ, so please check first).

All post treatment-filters, such as mineral filters, are optional. We recommend to buying locally, so that you can get replacement cartridges easily.

There are only 2 things to maintain: Descaling the boiler and keeping the drinking water tank/line sterile.

Descaling: If you have calcium above 2-3 dH in your water you need to use a water softening filter to reduce the amount of calcium that enters the boiler. This will keep the intervals of descaling to a minimum. Any coffee machine water softener available locally will do.

Cleaning the drinking water tank: We recommend hydrogen peroxide for this. It is harmless and is available locally. Fill or spray the tanks inside and flush out. Steam cleaning is another option. We recommend to doing this once a month.

Safe and eco drinking water

Unlike other technologies, distillation at high temperatures will produce the cleanest water possible. In combination with an optional carbon filter and UV-post treatment, you will have endless clean drinking water for decades. Regardless of what is in your feed water – distillation is the safest choice. Having your own drinking water in your home will reduce the number of plastic bottles you will use and throw away. Carrying bottles home and getting rid of the plastic waste is something you can forget about. Convenient and sustainable!


Adding minerals, flavours, syrups, bubbles and cooling down your drinking water is optional. Connect the drinking water to your fridge or install a special drinking water tap at your sink, that will make the installation complete and easy to use.

Technical specifications

Weight 60 kg
Dimensions 120 × 50 × 50 cm
Capacity for drinking water

25 liters. Internal water tank in stainless steel with male 1/2" connection

Capacity for hot water

85 liter

Daily drinking water output

Up to 20 liters. Depends on the hot water usage. Average app 10-15 liters per day.


Less than 30dB and only when the boiler is active. Otherwise noiseless.


800 W /230V heating element. Temperature controlled.


White. RAL 9010, shine 30.

Length of cable

3 meter cabel. Schuko. Black.

Mixing valve

Yes. ESBE VMB 432, termostatisc mixing valve that you can set for desired temperature between 35 and 60 C.

Security valve

Yes. Opening pressure is 6 bar.

Pipe connections

22mm conex for water connections
15mm conex for drain connection.


Internal: BWT Bestmax X
External: 10"-20" bottle filters

Temperature sensor

High temperature (180C), type pt1000.


High temperature PUR insulation. Extra thick – between 60 and 80mm.

Wall hanging bracket

4mm steel, white and up to 6 pcs 8 mm screws.

Pipe sizes (internal)

With pressure: 8mm John Guest
No pressure: Silikone hoses (10mm)

Solenoid valve

12V AC
NC – normally closed.

Security switch

Yes. On the side of the boiler
Set temp is 110C
Can be reset by pressing the red button

Test pressure, water tank

10 Bar



Select your currency
EUR Euro
USD United States (US) dollar