DIY furnace installation kits exist, and are available from retailers such as Home Depot and Lowe's. These kits can also be used to install gas ranges and boilers.
Installation kits include specialized safety valves for gas lines. These valves reduce the likelihood of gas leaks, fire and explosion during appliance installation.
Although kits make installing a furnace easier and safer, they do not eliminate all installation difficulties. Some furnace installations require specialized tools or custom duct work. Gas furnaces utilize pipes, and plumber's tools may be required to connect these pipes to the new heater. Users must also obtain building permits and code inspections before installing a furnace.