No, it is not deductible on a tax return. Since it is an improvement to the home the cost can be included in the Adjusted Basis of the home when it is sold.
If this is an energy efficient furnace you may be eligible for a tax credit.
To enter Home Energy Credits -
Click on Federal Taxes (Personal using Home and Business) Click on Deductions and Credit Click on I'll choose what I work on (if shown) Under Your Home On Home Energy Credits, click the start or update button
Or enter energy improvements in the Search box located in the upper right of the program screen. Click on Jump to energy improvements
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