Affiliate disclosure: Firebusters may earn a commission if you purchase through a link on this page, at no additional cost to you. We have not personally tested this heater. Product details are based on currently available retailer information and should be confirmed before purchase. The THERMOMATE 12V 5kW diesel heater is marketed as an all-in-one heating unit for caravans, camper trailers, vans and motorhomes. Its combined heater and fuel-tank format…