I’ve seen it first hand I tested a stove at an apartment complex a resident went to the hospital for co poisoning in a unit that our company had installed a new furnace a few months prior . The furnace was fine while checking the hallway and other sources I tested the stove the exhaust by the rear burner when the oven was on tested 1200 ppm ! Also tested a non vented gas fire place at a community center where people were complaining of head aches it tested at over 800 ppm ! These are reasons why I’m not a fan of non vented gas appliances in a home ! Keep in mind we’re only talking co not even mentioning the other byproducts is combustion , I’m a supporter for gas dryers and fire places that are vented properly , gas furnaces and hot water tanks but would never use non vented gas appliances in my home !And how many decades ago was this I never heard of such things as a problem other than it has happened and I worked at a gas company and serviced propane and LPG stoves, furnaces, fireplaces, hot water heaters. I have two pilot lights burning on my cook top as we speak, and they have been since about early sixties. Glad my kids got out safe after all those times with everything fired up. sponsored by the Sierra club, does anymore need to be said.
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