Replacing an old furnace can be a fairly straightforward process if the new heating and ventilation system you choose isn't much different than your old one. If you are switching systems, it may be more involved. Here is a look at the basic process of a new furnace installation.
The first step is contacting a heating, venting, and air conditioning (HVAC) specialist. Many times, old furnaces aren't nearly as efficient as modern heating systems. An HVAC professional will come and do a home assessment to see what you need.
They will need to assess not only your current furnace, but your vents and ductwork as well as the general layout of your home. Older homes often have inadequate ductwork on the upper floor, leaving bedrooms too cold in the winter. Additions can have the same problem. Areas like a sun porch can become to hot. The windows must also be taken into consideration. If they are old or original to the home, they likely aren't energy efficient, which may mean you will need a more powerful system if you aren't planning on replacing them anytime soon.
Choose A Furnace System
Once the heating, ventilation, and air conditioning specialist has assessed both your home and your current system, they will then present to you their proposal and their recommendation for a furnace as well as ductwork upgrades. You may also have to work with another contractor if any major changes need to be made to the home itself. Be sure to ask if building permits will be required and check to see if they routinely work with other building trades professionals.
Remove The Old Furnace
When any additional work that is recommended to be done is completed, the old furnace will be disconnected and dismantled and then removed. Ideally, this will be done when it isn't winter, but this can't always be avoided. Fortunately, heating installation professionals can usually make pretty quick work of the removal process, so installation can begin immediately.
Install The New Furnace
With the old furnace out of the way, it's time to install the new one. Depending on the type of furnace, this may be several steps, but basically it is a matter of reconnecting the power and gas lines, aligning the old and new ductwork, reconnecting or installing a new thermostat, and then turning it on. They will ensure everything is working properly before leaving.