Most vans have space heaters in which the combustion chamber is sealed off from the living area. Hence, no living area oxygen is used, and the carbon monoxide produced during combustion is exhausted outside. Some heaters also have a blown-air option, where the warmed air is fed through ducts around the van by a 12V fan on the back of the heater. Often, the blown-air system incorporates heating elements – up to 2kW – for use when the van is connected to the mains. The number of controls will depend on the sophistication of the heater. Ignition is either push-button or electronic, and these days is incorporated in the temperature control dial, while the blown-air system is operated by a second control. Both are fitted on the top of the heater. If mains elements are fitted, there will be a wall-mounted control panel to enable the owner to set the required power – usually 500, 1000 or 2000 watts – and the desired room temperature. During hot summer days, the fan can be used to circulate cool air throughout the caravan.

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