HECS Blog — HVAC Testing, Energy Certification, and Building Performance

What builders need to file before the 2026 credit-claim window and which certification pathways actually qualify.

Air sealing, duct leakage, and sampling rules that will decide whether your project closes.

The airtightness targets most Kentucky and Ohio custom-home projects miss before drywall — and what code officials are flagging now.

Section 45L is the most consequential federal credit in multifamily development this cycle. The 2026 sunset window is closing fast.

Inflation Reduction Act §45L credits remain a major lever for developers; here is what field-certified documentation looks like.

ENERGY STAR Multifamily New Construction §45L qualification after the One Big Beautiful Bill amendment.

The EPA’s AIM Act phase-down reshapes what residential HVAC crews carry, vent, and test on Kentucky job sites.

The §45L energy-efficient home credit remains active for qualifying acquisitions placed in service through December 31, 2032 — the practical question fo…

Practical compliance guidance for builders, developers, and code officials across Kentucky, Indiana, and Tennessee.

Timing the certification pathway before the §45L energy efficient home credit lapses.