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EHS cutaway view, insulation in silver

EHS

Hygienic stratified combination storage tank with 1 heat exchanger

  • hygienic tank
  • 7 sizes · 2 Insulation
Volume
550–2,000
operating pressure
3 bar

Note: Heat pump. We recommend this type of tank only with certain reservations when used in conjunction with a heat pump! This is because the “low” flow temperature of the heat pump (usually 50–55°C) can lead to limitations in hot water comfort. We recommend our EHSWP tank, which was developed specifically for heat pumps! About EHSWP

Sizes and Availability

7 sizes · 2 Insulation

As of Oct 28, 2026
  • Efficiency Class
  • Heat loss in W
  • Click a cell to open the item; use the arrow keys to move through the table.
6 of 14 combinations available for immediate delivery
Size Tank without insulation Ecoline Vlies silver Neodul® silver
550 550, Tanks without insulation: Diameter 700 mm Weight 145 kg Item No. 175550 Delivery time: approx. 4–8 weeks 550, Ecoline Vlies silver: Efficiency Class C 118 W Item No. 840417 Delivery time: approx. 4–8 weeks 550, Neodul® silver: Efficiency Class B 68 W Item No. 840469 Delivery time: approx. 4–8 weeks
750 750, Tanks without insulation: Diameter 790 mm Weight 165 kg Item No. 175750 Delivery time: approx. 4–8 weeks 750, Ecoline Vlies silver: Efficiency Class C 127 W Item No. 840420 Delivery time: approx. 4–8 weeks 750, Neodul® silver: Efficiency Class B 83 W Item No. 840470 Delivery time: approx. 4–8 weeks
900 900, Tanks without insulation: Diameter 790 mm Weight 192 kg Item No. 175900 In stock 900, Ecoline Vlies silver: Efficiency Class C 141 W Item No. 840423 Available immediately 900, Neodul® silver: Efficiency Class B 98 W Item No. 840471 Available immediately, limited stock
1100 1100, Tanks without insulation: Diameter 850 mm Weight 180 kg Item No. 1751100 Delivery time: approx. 4–8 weeks 1100, Ecoline Vlies silver: Efficiency Class C 130 W Item No. 840484 Delivery time: approx. 4–8 weeks Not included in the price list 1100, Neodul® silver: Efficiency Class B 108 W Item No. 840472 Delivery time: approx. 4–8 weeks Not included in the price list
1250 1250, Tanks without insulation: Diameter 950 mm Weight 150.234 kg Item No. 1751250 In stock 1250, Ecoline Vlies silver: Efficiency Class C 130 W Item No. 840430 Available immediately Not included in the price list 1250, Neodul® silver: Efficiency Class B 107 W Item No. 840473 Available immediately Not included in the price list
1500 1500, Tanks without insulation: Diameter 1,000 mm Weight 209.034 kg Item No. 1751500 In stock 1500, Ecoline Vlies silver: Efficiency Class C 142 W Item No. 840433 Available immediately Not included in the price list 1500, Neodul® silver: Efficiency Class B 122 W Item No. 840474 Available immediately Not included in the price list
2000 2000, Tanks without insulation: Diameter 1,100 mm Weight 257.101 kg Item No. 1752000 Delivery time: approx. 4–8 weeks 2000, Ecoline Vlies silver: Efficiency Class C 166 W Item No. 840436 Delivery time: approx. 4–8 weeks Not included in the price list 2000, Neodul® silver: Efficiency Class B 113 W Item No. 840475 Delivery time: approx. 4–8 weeks Not included in the price list

Description

The EHSS hygienic stratified combination storage tank is suitable for storing heating water and heating drinking water in combination with solar systems, wood-fired heating systems, combined heat and power (CHP) units, and conventional heat generators.

Because the water volume is limited to 30–50 liters and the “flow-through principle” is used, no precautions against Legionella risk are required in accordance with DVGW Worksheet W551.
Equipped with a sensor terminal strip for variable positioning of the sensors.

Features

  • Insulation options (to be ordered separately): We recommend this type of tank only with certain reservations when used in conjunction with a heat pump! This is because the “low” flow temperature of the heat pump (usually 50–55°C) can lead to limitations in hot water comfort. We recommend our EHSWP tank, which was developed specifically for heat pumps!
  • With a smooth-tube heat exchanger (1-inch tube)
  • Type 750+900 with 2 stratification channels for optimal stratification
  • Highest build quality
  • High-quality S235JR steel in accordance with EN 10025
  • Operating pressure: 3 bar
  • Test pressure: 4.5 bar
  • Operating pressure of stainless steel corrugated pipe: 6 bar
  • Maximum operating temperature: 95°C
  • Option to install a contact sensor
  • 5-year warranty

Product video

EHS in motion

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