The tax credit for a new furnace is 10 percent of the cost on new qualified energy property installed, including the cost of labor and installation up to a maximum of $150. You may be eligible for an additional credit of up to $50 for an advanced air circulating fan for the furnace. That must be entered in the box above the box for the furnace.
See this TurboTax article for more details: https://turbotax.intuit.com/tax-tips/home-ownership/energy-tax-credit-which-home-improvements-qualif...
