What must be performed during an annual tune-up of a heating system?

The requirement for a combustion efficiency test during an annual tune-up is vital for ensuring that a heating system operates safely and efficiently. This test measures how well the furnace or boiler converts fuel into heat, providing critical data on the performance of the system. By conducting this test, technicians can identify any issues that may lead to incomplete combustion, which can produce harmful gases such as carbon monoxide.

Moreover, posting a copy of the combustion efficiency test results on site serves to inform both the technician and the homeowners about the system's performance and compliance with safety regulations. This practice promotes transparency and helps ensure that any necessary adjustments or repairs can be promptly addressed.

Visual inspections and system performance reviews, while also important aspects of maintenance, do not focus specifically on combustion efficiency, which is crucial for the safe operation of heating systems that use fuel. Regularly replacing filters and oil improves system operation but does not encompass the broader performance checks required to ensure safety and efficiency.