Catalytic heater

 

Autowarm heater.
The Therm X heater. Left, there is the device comprised of the petrol receptacle with the filling opening A, catalytic material C, covered with the lid G. Right, the device in the tin box.
 

The catalytic heater was more reliable, although not very efficient yet. The heat was generated by chemical decomposition of petrol. A wide range of catalytic heaters were available from the 1920s to 1960s.

 
 

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