What is a necessary venting requirement for gas appliances?

Gas appliances require proper venting to ensure safe operation and compliance with the relevant codes. Vented outdoors is the correct answer because gas combustion produces harmful byproducts, primarily carbon monoxide, which needs to be safely expelled outside to prevent any potential buildup within living spaces. Venting outdoors helps to disperse these gases in a safe manner, protecting the occupants of the building.

In contrast, venting to areas such as the attic, basement, or garage would not provide a safe solution for gas appliance operation. These locations can trap harmful gases, posing significant health risks. Additionally, code regulations strictly prohibit venting gas appliances into enclosed spaces or areas where combustion gases may accumulate, emphasizing the necessity of venting directly to the outdoors for safety and compliance purposes.