The Isotemp water heater is built to marine standards, making it perfectly suited for camper vans and off-road vehicles:
- Internal tank made of AISI 316 stainless steel, corrosion-resistant
- Extra-long wavy coils for highly efficient heat exchange
- High-quality polypropylene outer shell, lightweight and durable
- Extra-thick insulation for excellent heat retention
This design ensures a long service life and consistent performance, even in demanding environments.

Developed by Webasto, this water heater is recognized as a benchmark in the industry for compact installations requiring performance and reliability.

Van water heater with engine heat exchanger and electric element

This van water heater operates with two complementary heating modes:
Engine heat exchanger: automatically heats water while driving using the coolant heat
750 W electric element (120 V): allows heating water when the vehicle is parked, via an inverter and a battery bank
👉 Result: hot water without propane, without electrical overload, and without unnecessary waiting time.

Stable temperature and built-in safety

Unlike many compact water heaters, the Isotemp heats water from the bottom of the tank, where the water is coldest. This setup:
- Reduces mixing of hot and cold water
- Increases usable hot water volume
- Improves thermal efficiency
The water heater is equipped with a safety thermostatic mixing valve, essential because:
- The engine heat exchanger can heat water above 190 °F
- The electric element can exceed 160 °F
- The mixing valve ensures a constant temperature at the tap, protects against burns, and extends hot water availability — ideal for a shower in a van.

Technical specifications

Available capacities:
15 Liters / 4 Gallons
20 Liters / 5.3 Gallons
25 Liters / 6.5 Gallons
30 Liters / 8 Gallons
40 Liters / 11 Gallons
Voltage: 115 V AC
Power: 750 W
Water connections: NPT 1/2"
Internal tank: AISI 316 stainless steel
External housing: high-quality polypropylene
Safety valve: 6.0 bar / 87 psi (easy winterization)

Key advantages – Isotemp camper van water heater

Propane-free water heater for compact vans and RVs
Operates while driving and stationary
High-efficiency engine heat exchanger
Low-consumption 750 W electric element
Effective thermal insulation
Horizontal or vertical installation (360° mounting)
Robust and durable marine-grade design

Why choose an Isotemp water heater for your van?

If you are looking for a reliable, durable, and high-performance water heater for your camper van that can produce hot water without propane, simply while driving, the Isotemp water heater is a proven solution. It is widely used in high-end conversions and professional installations.