WWS 303.1

Article Number 15091901

Hot water storage tank WWS 303.1
with smooth tube heat exchanger

(heating, preparing domestic hot water)

The hot water tanks are enamelled according to DIN 4753 and the smooth pipe registers are specially dimensioned for operation with heat pumps. Very good thermal insulation guarantees low heat losses. The domestic hot water is produced in a continuous flow system.

Suitable for heat pumps up to max. 15 kW heat output.


Storage volume according to ERP: 300 litres
Nominal capacity: 276 litres
Heating water connection: R 1 1/4"
Cold water connection: 1 1/4"
Smooth-tube heat exchanger: 3.5 m²
Weight: approx. 135 kg incl. insulation
Device dimensions (Ø x H): 700 x 1330 mm incl. insulation
tilting dimension: 1500 mm with insulation
colour: silver grey

Additionally included in delivery:

  • protective anode

optionally available:

  • electric heating element 2/4/6 kW
Article Number 15091901
Equipment designation WWS 303.1
Energy efficiency class A
Standing loss 44
Hot water storage tank volume 300
accessories EN
Energylabel EN

Possible energy efficiency classes
Space heaters (35° C, 55° C): A+++ to D Ӏ Combined space heaters: A+++ to G Ӏ Combi heaters: A+++ to D Ӏ Hot water preparation: A+ to F Ӏ Combination combi heaters: A+++ to G Ӏ Hot water tanks: A+ to F Ӏ Domestic hot water preparation: A+ to F Ӏ Ventilation: A+ bis G