Quote:
Originally Posted by ecomodded
I noticed a cheap propane heater rated for indoor use which made me think one would be great for the shop. as these are radiant heaters you just point them and they heat the immediate area , allowing you to pin point the Btu's.
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This is all great.
However, since I built a
CO2 sensing fan controller, and can actually see the impact of CO2 from these "vent free" heaters.
I got one of these "vent free" NG heater things for my own shop, and the CO2 buildup was very fast and increasing.
Being involved in the CO2 controller project made me aware of the changes to awareness and judgment that increased CO2 levels can produce.
We need our very best perception and judgment when we're working in a shop.
The "vent free" heaters all have minimum cross-flow ventilation requirements. These requirements need to be regarded as the absolute minimum... not the optimum.
-AC