What is the best way of heating a Transporter sized campervan?

The simplest way of heating a campervan is using a campsites electrical hook up (EHU) and a small plug in heater.

If you would like heat but an EHU is not available (wild camping for instance) then a diesel heater is the best approach. 

Our personal favourite diesel heater for campervans is the Transporter Autoterm 2kw with a PU-05 controller. It offers simple, quiet and fuel efficient heating.

Hot water is another possibility, although given the limited space inside a Transporter it is rarely considered essential.