1. Calorifer made of steel enamelled inside
 
2. Smooth pipe heat exchanger enamelled, built in

3. Magnesium protection anode built in
2 units for ER 800 & 1000

4. Flange below as cleaning flange (ER 800 & 1000) or for the installation as flange-mounted electric heating element or blank flange with immersion sleeve  (All Variant)
 
5. Flange above as additional cleaning flange or for the installation as flange-mounted electric heating element (ER 800 & 1000)

6. Thermal insulation made of polyester fleece with foil jacket, red coloured

7. Thermometer included

8. Terminal bars for contact sensor