Pundmann Therm Boiler 12V/110V + AIR 9L – Water Heater

The Pundmann Therm Boiler AIR 9L is the highest-capacity AIR-model boiler in the Pundmann lineup, delivering maximum hot water volume through three independent heating methods. Designed for full-time travelers and overland builds that demand self-sufficiency, this boiler integrates seamlessly with your diesel heater system while also providing electric backup heating.

ou can standardize with 2 rods, which is very efficient, or you could opt to add an additional heating rod to zap water quickly.

Why AIR?

When your diesel heater is running to warm your van, the AIR model captures that waste heat and heats your water simultaneously — at zero extra fuel cost. This is the most energy-efficient hot water setup possible for a mobile build.

Key Features

• Three heat sources: air heat exchanger + 12V DC / 200W + 110V AC / 1000W
  • Option for 3rd 1000W Element for 2200W total
• Compatible with 2kW and 4kW auxiliary air heaters (Autoterm, Webasto, Espar)
• 6-liter food-grade stainless steel tank
• 90mm hot air duct connection (60mm adapter available separately)
  
• 3.5 bar pressure relief valve — safe for pressurized water systems
• EPP soft-shell insulation for excellent heat retention
• Auto shut-off thermostat at 70–75°C
• Ideal capacity for 1–2 person van or overland builds
• Drain valve opening to blow out for winterization
• Mixing valve Included to avoid scolding temperatures
• DC/DC switch included to optionally turn on heating elements (Fast and Slow energy-efficient heating options)

Specifications

• Capacity: 9 Liters
• Air Duct: 90mm
• Voltage: 12V DC / 110V AC
• Power: 200W (12V) / 1000W (110V)
• Max Pressure: 3.5 bar

Dimensions