The design of gas vent pipes and connectors for furnaces, water heaters, boilers, and other fossil-fuel appliances is a serious matter. Carbon monoxide poisoning, collapsing chimneys, fire hazards, ...
In the United States, 70 percent of homes use furnaces and 11 percent use boilers. Space and water heating equipment account for more than 70 percent of gas consumption and 90 percent of the oil ...
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