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EHSS cutaway view, insulation in silver

EHSS

Hygienic stratified combination storage tank with 2 heat exchangers

  • hygienic tank
  • 7 sizes · 2 Insulation
Volume
550–2,000
operating pressure
3 bar
Submit a request Data Sheet (PDF)

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.
4 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 167 kg Item No. 176550 Delivery time: approx. 4–8 weeks 550, Ecoline Vlies silver: Efficiency Class C 118 W Item No. 840418 Delivery time: approx. 4–8 weeks 550, Neodul® silver: Efficiency Class B 68 W Item No. 840476 Delivery time: approx. 4–8 weeks
750 750, Tanks without insulation: Diameter 790 mm Weight 205 kg Item No. 176750 Delivery time: approx. 4–8 weeks 750, Ecoline Vlies silver: Efficiency Class C 127 W Item No. 840421 Delivery time: approx. 4–8 weeks 750, Neodul® silver: Efficiency Class B 83 W Item No. 840477 Delivery time: approx. 4–8 weeks
900 900, Tanks without insulation: Diameter 790 mm Weight 240 kg Item No. 176900 Delivery time: approx. 4–8 weeks 900, Ecoline Vlies silver: Efficiency Class C 141 W Item No. 840424 Delivery time: approx. 4–8 weeks 900, Neodul® silver: Efficiency Class B 98 W Item No. 840478 Delivery time: approx. 4–8 weeks
1100 1100, Tanks without insulation: Diameter 850 mm Weight 270 kg Item No. 1761100 Delivery time: approx. 4–8 weeks 1100, Ecoline Vlies silver: Efficiency Class C 130 W Item No. 840485 Delivery time: approx. 4–8 weeks Not included in the price list 1100, Neodul® silver: Efficiency Class B 108 W Item No. 840479 Delivery time: approx. 4–8 weeks Not included in the price list
1250 1250, Tanks without insulation: Diameter 950 mm Weight 151.079 kg Item No. 1761250 In stock 1250, Ecoline Vlies silver: Efficiency Class C 130 W Item No. 840431 Available immediately Not included in the price list 1250, Neodul® silver: Efficiency Class B 107 W Item No. 840480 Available immediately Not included in the price list
1500 1500, Tanks without insulation: Diameter 1,000 mm Weight 209.879 kg Item No. 1761500 In stock 1500, Ecoline Vlies silver: Efficiency Class C 142 W Item No. 840434 Available immediately Not included in the price list 1500, Neodul® silver: Efficiency Class B 122 W Item No. 840481 Available immediately Not included in the price list
2000 2000, Tanks without insulation: Diameter 1,100 mm Weight 257.946 kg Item No. 1762000 Delivery time: approx. 4–8 weeks 2000, Ecoline Vlies silver: Efficiency Class C 166 W Item No. 840437 Delivery time: approx. 4–8 weeks Not included in the price list 2000, Neodul® silver: Efficiency Class B 113 W Item No. 840482 Delivery time: approx. 4–8 weeks Not included in the price list

Size 550

Size 750

Size 900

Size 1100

Size 1250

Size 1500

Size 2000

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 two smooth-tube heat exchangers (1-inch tubes)
  • 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

EHSS in motion

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