HVAC vs AC

HVAC vs Air Conditioning: Why the Difference Matters for Comfort, Cost and Air Quality Many people use HVAC and air conditioning interchangeably, but they are not the same. HVAC is a whole-home system that includes heating, ventilation, and air conditioning. AC refers only to cooling. Think of HVAC as the full toolbox, and AC as one tool inside it. Every HVAC setup includes air conditioning, but a ...