Myth #2 - A gas furnace with a good heat exchanger will NOT produce carbon monoxide and my family is safe.  (Dead Wrong!)

A good heat exchanger in a furnace is NO indication of your safety!

Most carbon monoxide poisoning incidents occur in situations where the furnace and water heater were both operating correctly and were intact!  The problem is usually found to be issues with combustion air or a blockage in a flue or chimney. 

To assume you're safe just because someone says your heat exchanger is "OK", but doesn't check the rest of your home, is pure folly!

Give me 15 minutes in your home and I can have ANY furnace with a good heat exchanger producing enough carbon monoxide to put you to sleep - permanently.  And, I'll guarantee I'll never touch the furnace itself. 

The point is, the heat exchanger (good or bad) does NOT determine whether a furnace produces dangerous levels of carbon monoxide!

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