The Department of Licenses and Inspections (L&I) ensures energy code compliance in Philadelphia. The materials on this page include information sheets, flowcharts, forms, and inspection checklists related to energy code compliance applicable to 2021 IECC.
To access the 2018 IECC documents, refer to energy code compliance materials.
| Name | Description | Released | Format |
|---|---|---|---|
| 2021 Commercial energy compliance documentation flowchart PDF | Use this flowchart to determine the required application and inspection documents for Commercial projects under the 2021 IECC. | April 27, 2026 | |
| 2021 IECC commercial compliance path selection form PDF | Use this form to identify the proposed Energy Conservation Compliance path for your Commercial project. | April 16, 2026 | |
| Commercial: Additional energy efficiency supplemental form – Commercial Building Permit PDF | Submit this supplemental form with the Commercial Building Permit application for verification of Energy Compliance Credit. | April 16, 2026 | |
| Commercial: Additional energy efficiency supplemental form – Mechanical Permit PDF | Submit this supplemental form with the Mechanical Permit application for verification of Energy Compliance Credit. | April 16, 2026 | |
| Commercial: Additional energy efficiency supplemental form – Inspections PDF | Submit this supplemental form to the inspector prior to final inspections for verification of Energy Compliance Credit. | April 14, 2026 | |
| Commercial: Energy monitoring compliance checklist PDF | Use this checklist for new construction projects where conditioned area exceeds 25,000 sq. ft. or where additional energy efficiency credits are proposed. | April 14, 2026 | |
| Commercial: Mechanical systems commissioning compliance checklist PDF | Use this checklist for commercial new construction projects to verify achieving and validating performance of energy efficiency systems for projects. | April 14, 2026 | |
| Commercial: Thermal envelope air leakage testing form PDF | Submit this form to the inspector prior to final inspections to certify the building envelope has been installed properly. | April 27, 2026 | |
| Commercial: Thermal envelope certificate PDF | Submit this form to the inspector prior to final inspection to certify compliance with the thermal envelope requirements. | April 14, 2026 | |
| 2021 Residential energy compliance documentation flowchart PDF | Use this flowchart to determine the required application and inspection documents for Residential projects under the 2021 IECC. | April 30, 2026 | |
| 2021 IECC residential compliance path selection form PDF | Use this form to identify the proposed Energy Conservation Compliance path for your Residential project. | April 16, 2026 | |
| Residential: HVAC equipment design form – one- or two-family PDF | Submit this form with your Mechanical Permit application to certify the proposed mechanical equipment for one- or two-family and townhouse has been sized and the whole-house mechanical ventilation system meets IECC minimum airflow and efficacy requirements. | April 16, 2026 | |
| Residential: HVAC equipment design form – Multifamily PDF | Submit this form with your Mechanical Permit application to certify the proposed mechanical equipment for Groups R2/R3/R4 (3 stories or less) is sized and the whole-house mechanical ventilation system meets IECC minimum airflow and efficacy requirements. | April 16, 2026 | |
| Residential: Air barrier and insulation installation checklist PDF | Use this checklist for projects under the 2021 Codes to certify construction has been properly air protected and insulated. | April 14, 2026 | |
| Residential: Duct and envelope testing form (DET) PDF | Submit this form to the inspector prior to final inspection to ensure construction ducts and envelope have been installed properly. | April 30, 2026 | |
| Residential: HVAC equipment certification form PDF | Submit this form to the inspector prior to inspection to certify the proposed mechanical equipment is sized and the whole-house mechanical ventilation system meets IECC minimum airflow and efficacy requirements. | April 14, 2026 | |
| Residential: Thermal envelope certificate PDF | Submit this form to the inspector prior to final inspection to certify compliance with the thermal envelope requirements. | April 14, 2026 |