What is one requirement for venting gas appliances?

Venting gas appliances is crucial for safety and efficiency, as it allows for the removal of combustion byproducts, including carbon monoxide, from the home. The correct answer emphasizes that venting must comply with local codes and be properly installed to prevent backdraft, which can pose serious safety risks. Local codes are established to ensure that all installations meet specific safety standards, taking into account factors like appliance type, building layout, and potential environmental impacts. Proper installation also includes ensuring that the venting system is sealed, properly sloped, and constructed of materials designed to handle the specific pressures and temperatures of gas appliances. This thorough adherence to codes helps prevent hazards such as backdrafting, where exhaust gases flow back into the living space rather than venting outside, potentially leading to dangerous situations.