| 摘要 |
<p>The roof of the caravan is fitted with a motor driven ventilator in a resonance free mouting, and covered by an external cap. The cap lifts as the airflow through the ventilator is increased, and closes to conserve heat. Fresh air is admitted via floor level grilles in the side walls, with shutters to control the inflow of the cold air. The system prevents the build-up of suffocating CO and CO2, especially when cooking or sleeping. The variable cover and flaps conserve heating and prevent the inside of the van becoming too cold.</p> |
