Tank:

• Material: steel sheet quality USD37.2
• Welds: by robot in an inert gas environment
• Cleaning: six-point sandblasting
• Internal coating: enamel (glass) baked at 860° C in BL models
• Pmax operation: 6 bar
• Pmax test: 15 bar for 5 minutes
• Tmax operation: 95° C

Cladding:

• Material: PVC technoleather in various colors

Exchanger:

• Type: fixed coil from 33mm section steel pipe (tube)

Insulation:

• Material: polyurethane without CFC & FCKW
• Density: 40 kg/m3
• Thickness: 50-65 mm

In boilers BL800 – BL1000, in all models, the insulation is made from flexible polyurethane 75mm which is also detachable for easier access in narrow passages.