Furnace installation: DIY vs hiring a pro
Gas furnace work requires a licensed HVAC contractor in every US state. Self-installation voids manufacturer warranty, voids home insurance coverage, and creates carbon monoxide and gas leak liability. Electric furnaces require a licensed electrician for the high-voltage feed and a permit in nearly all jurisdictions.
For practical contractor selection guidance, see the dedicated contractor hiring guide. For cost-saving tactics, see the savings guide.
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