It is considered OK to continuously run a furnace fan. Homeowners should experiment to see if it works best for their home to have the furnace fan running continuously or not. If homeowners find this is beneficial, it is generally suggested to only run the furnace fan constantly during the cold heating season. There are several benefits and some drawbacks to running a furnace fan constantly.
When the furnace fan is constantly on, air is continuously cycling throughout the home. This is beneficial because it can reduce cold and warm spots in the house. In addition, it provides extra air filtration which may be helpful if health risks are a concern. Some HVAC technicians also state that it is better for the fan motor to run continuously instead of turning on and off with the furnace.
Running a furnace fan constantly also has drawbacks. First of all, depending on the type of motor the furnace has, having the fan on continuously may add several hundred dollars to the home's electric bill. Newer motors called ECM motors are more energy efficient than older AC motors. Second, having a fan run constantly leads to higher dust levels in a home, even with expensive furnace filters.Learn More
The average furnace lasts 15 to 20 years. This life span is typical of a furnace with a stainless or aluminized steel heat exchanger. In contrast, old furnaces with heavy metal heat exchangers last for 30 to 40 years, but they are less efficient than newer models, prompting many homeowners to replace them even if they still work.Full Answer >
According to the American Iron and Steel Institute, the purpose of a blast furnace is to produce enough heat to extract iron from raw ore. Iron ore, coke and limestone are placed into a blast furnace and then heated until liquid iron can be separated from the ore.Full Answer >
The on-and-off cycling of your furnace depends on many factors, including proper system sizing, thermostat settings and weather conditions. Cycles that are too close together may indicate an oversized system.Full Answer >
Troubleshooting a furnace that does not turn off begins with examining it for a malfunction or clog. The thermostat, air filter and fuel supply can all be examined in less than an hour. If the error cannot be identified during these steps, contact your manufacturer and have a certified technician examine the furnace.Full Answer >