- Steel tank, glass-lined “Blue Glass 4753” using flow-coating method 850°C, WRAS (BS6920-1) certified
- Corrosion-proof magnesium anode
- Combustion chamber made of refractory material with pull-out ash collecting device
- Enamelled sheet metal external combustion chamber coating
- Mineral wool insulation layer for reduced heat loss
- Armoured copper heating element, regulation and safety rod thermostat (wood-electric version only)
- External casing made of sheet metal coated with epoxy powder paint
- Stored water temperature indicator