Make a list of certified, licensed HVAC contractors in your area. Ask for referrals from past customers and call each one with pertinent questions. What type of certification does this contractor have? There are some that are certified by the North American Technician Excellence or the Environmental Protection Agency.

Call each HVAC contractor and ask if they are able to install an HVAC system at your home in the time-frame you require. Ask questions as you speak to the contractor. You will need an HVAC contractor that is willing to educate you about what type of system you need and how to choose the best one for your home or business.

Get itemized bids from all HVAC contractors that you have approved. If the bids vary considerably, ask enough questions to determine why they do. Some HVAC contractors are reluctant to include new ducting or removal of existing equipment. They may also wish to install a unit that is too powerful for the location.

Before your final choice is made, be sure the contractor is covered fully by insurance. A signed contract that covers all bases is a good idea.