Unlock the secrets of HVAC systems with Purcell Heating's expert guide. Learn how heating, ventilation, and air conditioning work together through ductwork, thermostats, and refrigerant cycles to keep Vancouver homes comfortable year-round. Essential reading for BC homeowners! https://www.purcellheating.ca/how-do-hvac-systems-work-unveiling-the-secrets-of-heating-and-cooling/