A neighbour up the street had a house fire caused by his tumbler drier. The insurance company said it was his fault for not cleaning the filter. Luckily the bins had not been emptied and he had evidence of fluff removed from the drier. Not sure how well they would receive this modification.Genius idea - use a diesel/kero heater to supply the hot air.
1/4 the price of electricity.
Of course they have made gas ones for years but they are rather expensive.