Mechanical Insulation Installation Incentive Act of 2025

This bill creates a 10% federal tax credit for labor costs associated with installing energy-saving mechanical insulation on qualifying systems. It directly affects businesses or property owners in the U.S. that install insulation meeting specific energy efficiency standards (ASHRAE 90.1) on depreciable mechanical systems, such as HVAC or industrial equipment. The credit applies to labor costs paid or incurred after December 31, 2025, but expires after December 31, 2028. It is structured as part of the general business credit and does not cover material costs, only the labor for installation.