The reason that propane /butane refrigerant is much more dangerous than engine fuel system fires, is that the flamible refrigerant has direct access to the inside of the cab through the AC vents. A leaking / ruptured evaporator will release hot liquid propane inside the cab that will expand aprox 200 times into highly explosive / flamible vapor that quickly fills the cab. Sparks from the brush type AC blower motor is a perfect ignition source to light off the propane vapor.
Why risk that kind of danger when R134a is legal, cheap, avalible anywhere and it works.
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Today's Featured Article - A Towny Goes Plowing - by Anthony West (UK). I live in an area renowned for its rural beauty. Small fields with hedgerows and trees are common place, as are small hamlets with village greens and the odd duck pond complete with swans. The center of any village once the shop is closed is the old tavern. Rustic places with cheerful names like "The Griffin" "Red Lion" or "The Plough and Harrow" are found dotted around the country lanes all over the place. The warm glow of yellowish light can be seen for quite some distance at dusk, and
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