Final answer:
Gas vents are required to be installed according to the manufacturers' instructions to ensure proper and safe installation.
Step-by-step explanation:
All gas vents are required to be installed according to the manufacturers' instructions.
When installing gas vents, it is important to follow the specific instructions provided by the manufacturer. These instructions ensure that the vents are installed correctly and safely, preventing any potential hazards.
Failing to follow the manufacturers' instructions can result in improper installation, which can lead to leaks, backdrafting, or other dangerous situations.