Most licensed heating, ventilation, and air conditioning service companies provide installation services for indoor and outdoor furnaces. There are things to consider when selecting a company to work with, such as its credentials, types of licenses and insurance.
If the new furnace is replacing an existing unit, it's important that the contractor understands the size of the area and is able to both install the new equipment properly and also remove the existing unit. Additionally, he should be willing and able to determine any existing issues with the duct system and insulation that require repair or maintenance prior to installing the new unit.
One should expect a good contractor to perform a sizing calculation, an infiltrometer blower door test and diagnostic testing for air flow in the duct system. The diagnostics testing is particularly important for uncovering any existing issues in the duct work that may cause costly problems later on.
Other considerations one should make when choosing a contractor include confirming that the technician is registered and licensed by the state, province or city to perform heating installation work, and the company should also carry general liability and workers compensation insurance. The company should have a clear refund policy as well as background information, such as how long it has been in business or if it's a member of a national trade association.