Cars with Vapor Absorption Systems (VARS)

none exits. Common vapor absorption refrigeration systems (NH3/H20) require lower condensing temperature than is usually available in automotive service and also weigh more and take a lot more space than R-134a or propane systems. Yes, common propane would be an EXCELLENT substitute for R134a or the newly proposed replacement (patented of course).

The 'flammability' concern is a 'red herring'. We travel in a vehicle carrying 10-20 gallons of highly flammable gasoline, pumping it under high pressure to the engine, in easily damaged hydrocarbon polymer lines running over hot ignition sources and do not have any concerns. We routinely drive only inches from on-coming cars at velocities which would surely cause instant death from collision forces if we sneeze and jerk the wheel at the wrong time.

A couple of pounds of propane in the A/C system is of little consequence in a major collision. Propane quickly dissipates harmlessly into the air, not sinking down, but quickly rising up. It is totally benign to the environment, with almost no 'greenhouse gas' potential. Were it inherently and unreasonably dangerous, would it be so widely used in camping stoves, lanterns, home cooking, home heating,etc.etc.

It's all about how one company with a good and powerful lobbiest wants to make a lot of money forcing everyone to use the patented chemical they have created. Thus was R-134a invented. And thus is the 'replacement' for R-134a being pushed now.