US HB7460

Creates a new tax credit (Section 45BB) for indoor air quality improvements at commercial, public, and 501(c)(3) nonprofit properties, with credit amounts of $1/sq ft for air quality assessments, $5/sq ft for air cleaning system upgrades, and $50/sq ft for HVAC upgrades

Increases credit amounts fivefold (to $25/sq ft and $250/sq ft) for air cleaning and HVAC upgrades that meet prevailing wage requirements and use at least 15% qualified apprentice labor hours

Requires upgrades to comply with ASHRAE Standard 62.1-2022 or Standard 241-2023 and mandates use of energy-efficient Indoor Air Quality Procedure when it costs no more than the alternative Ventilation Rate Procedure

Caps the credit at 50% of total expenditures for HVAC and air cleaning upgrades, with assessment credits capped at actual costs paid; applies to amounts paid after December 31, 2026

Directs the Secretary of Energy to establish within 365 days a voluntary certification program for property owners to verify compliance with indoor air quality standards