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, ...

Two manufacturers of plastic venting systems are pushing for a national fuel gas code in the United States that requires Underwriters Laboratories Inc. certification for use in some natural gas-fired ...

In response to consumer demand for higher efficiency boilers and updated regulations from the U.S. Department of Energy, the conversion from noncondensing to condensing vent systems becomes necessary.