A combination of insulation improvements, air sealing, and winterization projects will help ensure your heating system is efficient and long-lasting. The worse your home's insulation, the harder your heating and cooling system will have to work.
When the thermostat sends its signal to the furnace, the furnace gas valve opens and ignites the burner component beneath the combustion chamber. The gas valve works with the thermostat to regulate the amount of gas that flows into your furnace.
Ask your technician for ways to increase your furnace's efficiency.
This system is also known as a ducted warm-air or forced warm-air distribution system.