A NOS military surplus military immersible heater 35k btu can run on gas,kero, diesel, and after warmed up can use biodiesel to heat your WVO for transesterification process, can change temp of 55gallons by 100 degrees in LESS than 3 minutes!!!! surplus stock for sale on ebay they are the M35 model and has a side clamping system , can be used as heater for WVO, also water,or other non flammable fluids for projects or camping and heat water to wash utensils,bath, etc.
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