You need to make sure that any HVAC contractor you work with is certified to work as an HVAC contractor in your state. This licensing is sometimes handled on the state level, but is often handled at the local level. You should contact your local government offices for a list of certifications and licenses required to be an HVAC contractor in your area.

You should ask the HVAC contractor to give you an estimate. The estimate should cover the total estimated cost of the project and how much time the contractor thinks it would take to complete the work. These estimates will be essential when you are deciding on which contractor to hire. Contractors who are cheap are not necessarily fast. Contractors who are fast are not necessarily skilled. You need to keep all of this in mind when looking for a contractor, and getting an estimate will help you determine what you want.

You should be willing to put down a deposit on the work before the contractor gets started. The deposit should be no more than 25 per cent of the total estimated cost of the project. Don't hire a contractor who pressures you to pay a larger deposit than this.