Many of you use a furnace to heat your house. This furnace runs on electricity, wood, coal, propane, oil, and natural gas.
Gas is, however, the most commonly used fuel today. The reasons for this are that gas is not expensive, commonly available, and burns cleanly.
A gas furnace, how does it work? The process of heating your house starts with the thermostat kept inside your house. The thermostat is a device that is used to sense the temperature of the room. In case the rooms temperature falls below the desired value, the heating system is turned on by the thermostat. In modern heating systems, the inducer fan is turned on. This fan starts pulling in air till sufficient combustion airflow has been established. Once this is done the gas valve is opened and gas is allowed to pass through. This gas flows through the burner it is ignited using either the heat given out by an ignitor or a spark. A small flame is kept burning continuously in older furnace units. This flame is called standing point and is used to light the gas.
After the flame has been ignited the ignitor or the spark is turned off. However, in the case of older furnaces the standing point flame is allowed to burn. After the gas has burnt for at least two minutes, the blower will start dispersing the heat around your house. This is because the air that is going to be circulated in the house should be sufficiently hot. After either the two minute wait period or the air has reached the required temperature the motor of the blower is turned on. This heated air is then sent through duct system which spreads it to the different rooms. Hot air enters the different rooms through the vents one can find in the ceilings, wall and even the floor.
After the rooms temperature has been raised to a certain extent, the furnace is switched off. Thermostat again switches off the furnace. Like before the thermostat senses the temperature and once it has reached the value set by you, the gas valve to the furnace is turned off. This process will stop the gas from reaching the furnace. The blow motor may run for a few more minutes after this. The reason behind this is that the heat exchange should cool down a bit. The time for which the blower motor will run depends on the temperature switch or a timer.
Author recommends to check out more about Gas Furnace Minneapolis and Furnace Maintenance St Paul.
Gas is, however, the most commonly used fuel today. The reasons for this are that gas is not expensive, commonly available, and burns cleanly.
A gas furnace, how does it work? The process of heating your house starts with the thermostat kept inside your house. The thermostat is a device that is used to sense the temperature of the room. In case the rooms temperature falls below the desired value, the heating system is turned on by the thermostat. In modern heating systems, the inducer fan is turned on. This fan starts pulling in air till sufficient combustion airflow has been established. Once this is done the gas valve is opened and gas is allowed to pass through. This gas flows through the burner it is ignited using either the heat given out by an ignitor or a spark. A small flame is kept burning continuously in older furnace units. This flame is called standing point and is used to light the gas.
After the flame has been ignited the ignitor or the spark is turned off. However, in the case of older furnaces the standing point flame is allowed to burn. After the gas has burnt for at least two minutes, the blower will start dispersing the heat around your house. This is because the air that is going to be circulated in the house should be sufficiently hot. After either the two minute wait period or the air has reached the required temperature the motor of the blower is turned on. This heated air is then sent through duct system which spreads it to the different rooms. Hot air enters the different rooms through the vents one can find in the ceilings, wall and even the floor.
After the rooms temperature has been raised to a certain extent, the furnace is switched off. Thermostat again switches off the furnace. Like before the thermostat senses the temperature and once it has reached the value set by you, the gas valve to the furnace is turned off. This process will stop the gas from reaching the furnace. The blow motor may run for a few more minutes after this. The reason behind this is that the heat exchange should cool down a bit. The time for which the blower motor will run depends on the temperature switch or a timer.
Author recommends to check out more about Gas Furnace Minneapolis and Furnace Maintenance St Paul.
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