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.
An electric heater could also be an option for some, as they are affordable, ranging from $1,000 to $2,000. However, these systems are not true furnaces and are not good for large spaces. A heat pump may also be ideal for some households; the cost ranges from $1,500 to $7,000 when air sourced, or $7,000 to $25,000 when ground sourced. These heat pumps do not do well in cold climates, but they can also be used as an air conditioner in the summer.