The Heat Air 4 G is a perfect all rounder. Externally mounted and with 4kW power, it's the ideal heater for panel van conversions. It gives you comfort, quiet operation and additional space. Whale brings a new and innovative range of gas and electric space heaters to the recreational vehicle market. These heaters are designed to give you more space inside your van, extra comfort when using your van and quiet operation so you can sit back and relax.