Carbon monoxide (CO) leaking inside the house is a serious concern. How are they tested? What harm will it cause? How do you properly manage a furnace?According to Reuben, experts in the field conflict with each other on how to properly test CO on furnaces. While it is not required in the standard inspection process, he shares the common and right way to do it. Tessa discusses the types of furnaces, how they work, as well as how to test them. They also talk about the proper equipment to use and its calibration.Reuben also shares the downside of shutting off a furnace and their threshold for the servicing needs. On the other hand, one type is never tested because it always yields an erroneous result.

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