The answer to 'difference between AC and' is that air conditioning (AC) and heating, ventilation, and air conditioning (HVAC) systems are related but have distinct features, benefits, costs, and use cases. AC systems are focused solely on cooling the air, while HVAC systems handle both heating and cooling, as well as air circulation and filtration.
AC systems are generally less expensive to install and operate, but they only provide cooling and do not have the added functionality of an HVAC system. HVAC systems can provide year-round climate control, improving comfort and energy efficiency in your home. The choice between AC and HVAC will depend on your specific needs, climate, and budget.