On Wed, Jun 2, 2010 at 7:32 AM, Gerhard Fiedler wrote: > Hello, > > I have a room (with good ventilation) that I want to heat with gas. Not > on an ongoing basis, just for short times here and there, and not by > much, maybe a few degrees C (single digits). > Does the room have good ventilation or will your heater have good ventilation? I would never consider a non-vented flame as a heat source. Carbon monoxide will make you miserable, possibly in more ways than one. In the US, some states allow (I think) non-vented natural gas or kerosene heaters. This doesn't mean it's good for your health. -- Martin K. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist