Final answer:
The B149.1 and B149.2 codes relate to gas installation and venting, focusing on safety standards for gas systems in buildings.
Step-by-step explanation:
The B149.1 and B149.2 installation codes specifically pertain to gas installation and venting codes. These codes are part of the safety standards in place to ensure that gas systems in buildings are installed and vented in a manner that protects the safety of inhabitants. They do not cover electrical or plumbing codes, nor do they address general building construction codes. Instead, they focus on the safety requirements related to gas appliances and equipment, ensuring proper function and reducing risks associated with gas leaks or improper venting.