Average is around 15 years although some may last as much as 20 years. Of course some last as little as 10 years. Usually the first things to fail are the parts associated with the blower. Anything that can wear out the motor quicker will shorten the life of the furnace such as: high humidity, vibration, inconsistent power, power surges, water leakage, very gritty air.
it depends on how well maintaned it is should be inspected every year ,please do not go to one hour furnace they will tell you you need a knew one when you don't
an electric furnace runs off of 208/230 Volts while a typical gas furnace runs off of 120 also a gas furnace will have a valve for the gas relay where the gas enters the furnace.
15 years
You can find a schematic for a gas furnace on the website, Uncionradio.
You should not run gas from the furnace to any appliances.
an average cost would be around 2500 for materials. That's a 14 seer straight A/C with a 80% gas furnace and A-coil
There are many places to find gas furnace prices. One can look on sites like Furnace Price Guides, Century Gas Furnace, and Consumer Reports. One can also find gas furnace prices by going to a local heating supply store.
A gas furnace is a furnace that operates to keep your house warm with the use of gas. Gas furnaces are very energy efficient furnaces, and are the most common furnaces used in North America.
# Why doe the gas furnace blow black smoke?
A furnace spark ignitor works by creating a spark that ignites the gas in a furnace. When the ignitor is activated, it generates a high-voltage electrical spark that ignites the gas, allowing it to burn and produce heat for the furnace. This process is essential for starting the heating cycle in a furnace.
One could find information on gas furnace troubleshooting online at Ask. Hvac for beginners is also a great place to look. One could also contact their local gas furnace dealer and/or repairer for gas furnace troubleshooting.
Go with gas.