I thought posting this experience could prevent someone else from having a more serious outcome.
I was programming a motion sensor the other day, and inadvertantly turned on the attic fan. I was in the basement and didn't notice it. Since it is winter, all the windows in the house were closed. A little later my wife came down and commented how warm it was in the basement. After some looking around I descovered that the low preasure created by the exhaust fan was pulling air in through the furnace flue, along with the heat and Carbon Monoxide from the burner!
So the upshot is, I installed a carbon monoxide detector. I still need to determine what to do about the fan. Perhaps a sensor of some kind to determine the furnace status and a script or possably mechanical device to prevent both the furnace burner and exhaust fan from operating at the same time?
I was programming a motion sensor the other day, and inadvertantly turned on the attic fan. I was in the basement and didn't notice it. Since it is winter, all the windows in the house were closed. A little later my wife came down and commented how warm it was in the basement. After some looking around I descovered that the low preasure created by the exhaust fan was pulling air in through the furnace flue, along with the heat and Carbon Monoxide from the burner!
So the upshot is, I installed a carbon monoxide detector. I still need to determine what to do about the fan. Perhaps a sensor of some kind to determine the furnace status and a script or possably mechanical device to prevent both the furnace burner and exhaust fan from operating at the same time?
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