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As of 2015, a new furnace generally costs between about $1,950 and $5,800. The price is greatly affected by the type of furnace, location, energy efficiency and installation effort.


The most common furnaces are natural gas furnaces and range in price from about $2,500 to $14,000 depending on the size. Oil furnaces are a bit more affordable but less efficient. They cost from $2,000 to $8,000 and may be more expensive to install.


Homeowners looking for a forced-air furnace can turn to Lowe's, Home Depot or Amazon to find the right heating unit for their needs. Lowe's and Home Depot offer in-store support for shoppers as well as online sales, and Amazon provides useful specifications for each unit sold online.


As of 2015, a hot air furnace can be purchased from online retail stores, such as Home Depot and Lowes, as well as manufacturer websites, such as Rheem and Lennox. Manufacturer websites also typically provide a dealer or store locator for interested customers who want to shop for furnaces locally.


As of 2015, Home Advisor says that furnace repair costs average $200 per year in the United States. The cost to clean a furnace depends on its age, how well it has been maintained, and the availability of filters and other parts that may need to be replaced.


The weekly cost of furnace oil from 1990 to the present ranges from around $1.00 to over $4.00 per gallon in 2016, according to the U.S. Energy Information Administration. The cost of furnace oil varies with the oil market and global fluctuations in supply and demand.


The size of a furnace has a dramatic affect on its cost, with pricing rising with the size of the furnace. Furnaces with higher efficiency ratings typically cost more than ones rated lower.


Furnaces with near-total efficiency, or an annual fuel utilization efficiency (AFUE) of around 97 percent, are recommended for reducing heating costs, according to Consumer Reports. Using more energy-efficient furnaces leads to lower energy bills for heating.


The first known person to invent a forced hot air furnace was William Strutt, who invented a cast iron and brick hot air furnace in England in 1805; however, the first person who came up with the idea of circulating warm air to heat a building is unknown. Hot air heating systems were in use in Europ


According to Angie's List as of March 2015, electric furnaces typically cost between $1,000 and $2,000 to install, which is significantly cheaper than other types of furnaces. However, electric furnaces are generally more expensive to run than fuel-fired furnaces.