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John Hines
 
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wrote:


We have natural gas (no, not flatulence, but for heating). When
you burn natural gas you get CO2 and water. No CO as far as I know
unless "bad" burn. So shouldn't such homes have CH4 (methane)
detectors (pilot out) or do CO detectors somehow also catch CH4?


Natural gas has an odorant, which makes it "smellable" by the human
nose.