How to Install a Furnace: DIY or Professional Help?

Learn step-by-step how to install a furnace safely and decide whether to DIY or hire a pro. This guide covers planning, tools, permits, removing the old unit, duct and gas connections, electrical hook-up, startup, safety checks, and when to call a licensed HVAC technician. Perfect for homeowners weighing cost savings vs. risks—includes tips on energy efficiency, venting, carbon monoxide safety, and troubleshooting common problems.