Final answer:
A certified TSSA welder is generally permitted to repair a heat exchanger on a forced air furnace, ensuring safety and maintaining efficiency.
Step-by-step explanation:
The statement that a heat exchanger on a forced air furnace in a dwelling can be repaired if the welder is certified by TSSA is generally true. The Technical Standards and Safety Authority (TSSA) certification ensures that the welder has the necessary qualifications and adheres to established safety standards when performing repairs on heating equipment. It is important for safety and operational efficiency that such repairs are done by certified professionals to prevent potential hazards, such as gas leaks or carbon monoxide poisoning, and to maintain the manufacturer's efficiency ratings.The statement in the question is true. A heat exchanger on a forced air furnace in a dwelling can be repaired if the welder is certified by TSSA (Technical Standards and Safety Authority). The TSSA certification ensures that the welder has the necessary knowledge and skills to carry out the repair safely and effectively.