How many gas cylinders should I take with me on a trip?

In the category The living area of the van

This depends very much on the circumstances (number of people, temperatures, consumption...). A rough estimation: in winter with a gas heater, you can go 4 days with one gas cylinder, whereas in summer you can survive a month on one gas cylinder as you use the heater little or not at all. If you have a diesel heater, you can go longer in winter with one gas bottle as only the cooker and fridge use gas.