I used LPG as the primary fuel on my trailer mounted driers , it worked very well , with none o the mess associated with diesel or kerosene burners .
LPG is also a waste fraction from when they crack off diesel, petrol etc , and what you pay for it results in big profits for oil companies , there is only 5% VAT on it so even at 67p a litre they are making a lot more than on liquid fuels.