What type of gas appliance requires a venting system?

Gas-fired water heaters require a venting system because they burn gas to heat water, producing combustion gases that need to be safely expelled from the living space. Proper venting directs these gases outside, which is crucial for preventing harmful air quality issues, including carbon monoxide build-up inside the home.

In contrast, portable gas heaters, gas stovetops, and gas grills often do not require a venting system in the same manner. Portable gas heaters may be designed for unvented operation, using specific safety measures to minimize indoor air quality risks. Gas stovetops primarily burn gas to cook food and, while they do produce combustion byproducts, they are typically used in well-ventilated kitchens where these gases can dissipate safely without a dedicated vent. Gas grills, especially outdoor ones, do not need venting since they operate outdoors, where any combustion gases can freely disperse into the atmosphere.