Gas Technician 1 (G1) Certification Practice Test 2025 – Comprehensive All-in-One Guide to Exam Success!

Maximizing the efficiency of a furnace is crucial for optimal performance and energy savings. Proper maintenance and duct sealing play a significant role in achieving high efficiency. Regular maintenance, such as cleaning or replacing filters, inspecting and cleaning burners, and checking for gas leaks, helps ensure the furnace operates at peak performance. Additionally, sealing ducts helps prevent air leaks, which can lead to significant energy losses. When conditioned air escapes from the ductwork, the furnace has to work harder to maintain the desired temperature, thus reducing overall efficiency.

In comparison, increasing the output temperature may result in the furnace working harder without necessarily improving its efficiency. Reducing gas input alone doesn’t guarantee better efficiency since it could affect the furnace's ability to meet heating requirements. Likewise, while larger duct sizes can assist with airflow, they don’t inherently improve the efficiency of the furnace itself, especially if other factors, such as maintenance and air leakage, are not addressed. Therefore, focusing on maintenance and proper sealing directly impacts the operational efficiency and longevity of the furnace.