What is the primary purpose of electric heat in HVAC systems?

The primary purpose of electric heat in HVAC systems is to provide supplemental or primary heating. Electric heating systems utilize electric resistance or electric heat pumps to generate warmth for indoor spaces. This can be especially beneficial in climates where additional heating is necessary during colder months when conventional heating may not suffice.

Electric heat serves as a dependable source of warmth, ensuring that indoor environments are maintained at comfortable temperatures. In some cases, it acts as the main source of heat for a building, while in others, it serves to supplement existing heating systems, enhancing overall comfort and efficiency.

The other options focus on aspects that electric heat does not primarily address, such as cooling costs, indoor air quality, or ventilation efficiency, which are not directly related to the function of electric heating within HVAC systems.