Many homeowners aren't fully knowledgable about how their HVAC system operates and why they should have maintenance service performed if everything seems to be working. Your home Hvac system is made up of heating and cooling equipment.Similar to schedule auto maintenance. The mechanical components in your home need to have regular preventive service performed to prolong the life of the equipment and avoid breakdowns during peak usage. Its beneficial for homeowners to underestand the cost of service compared to the cost of unexpected replacement of equipment or emergency service calls during peak season use. Just like car repairs, it is less expensive to have scheduled oil changes and service than replacing an engine or breaking down while on long trip. Having your heating and cooling systems professionally serviced will give you insight in to the total cost to keep equipment running during its life and at what point it is time to replace the units. Pre-season maintenance should be done in case replacement parts have to be ordered or a new unit purchased. This will give you more time to evaluate the cost to maintain operation for the upcoming season.