Certified Apartment Maintenance Technician (CAMT) Practice Exam 2025 - Free CAMT Practice Questions and Study Guide

The furnace is the primary component responsible for heating air in an HVAC system. It functions by burning fuel or using electric elements to generate heat. This heat is then transferred to the air, which is subsequently circulated throughout the space via ductwork and vents. A furnace is designed to maintain comfortable indoor temperatures, particularly during colder months.

While the other components mentioned play significant roles in the overall HVAC operation, they do not primarily heat the air. The compressor, for instance, is responsible for circulating refrigerant in air conditioning systems and does not heat air directly. The evaporator is involved in the cooling process, absorbing heat from the indoor air, while the fan coil serves to distribute conditioned air but relies on other components for heat production. Thus, the furnace is clearly identified as the key element responsible specifically for heating air within the HVAC system.