ICC E2 case studies
ICC E2 · Put your knowledge to work in context.
The ICC Commercial Energy Inspector (E2) is a professional credential offered within the International Code Council's certification program for building safety professionals. It is aimed at code officials, inspectors, plans examiners, and related practitioners who verify energy code compliance on commercial projects, and it is designed to document that a candidate can apply commercial energy provisions in the field rather than only recognize them on paper. The ICC E2 case studies are 5 cases and about 2,074 words.
1Mixed-Occupancy Tenant Fit-Out and the Scope of the Alteration
A 1970s four-story office building (48,000 ft² conditioned) is being renovated floor by floor. On Floor 3, a tenant fit-out replaces lighting in 12,000 ft², adds a 6-ton packaged rooftop unit serving a new server room, and reconfigures two restrooms.
469 words, about 2 min2Envelope Trade-Off When As-Built Fenestration Exceeds the Prescriptive Limit
A new 22,000 ft² single-story retail building in a mixed-humid climate (CZ 3A) was permitted using the prescriptive envelope path. During framing inspection, the inspector measures the storefront glazing at 31% window-to-wall ratio (WWR) against a permitted design of 24%.
435 words, about 2 min3Rooftop Unit Replacement and Economizer Applicability
A 9,000 ft² strip-mall tenant replaces a failed 10-ton packaged rooftop unit serving a retail sales area in CZ 4A. The like-for-like replacement is quoted at 11.0 IEER and 13.0 SEER2, with a factory economizer option deleted to save cost.
369 words, about 2 min4Lighting Power Density Verification in a Warehouse With High-Bay LED Retrofit
A 60,000 ft² warehouse (40,000 ft² storage, 20,000 ft² office) undergoes a lighting alteration: all high-bay fixtures in storage are replaced with LED high-bays, and office troffers are replaced with LED panels. The contractor submits a lighting power density (LPD) calculation showing 0.55 W/ft² for storage and 0.90 W/ft² for office, using the space-by-space method.
428 words, about 2 min5Commissioning and Verification Sign-Off on a Small Commercial Building
A 45,000 ft² new mixed-use building (retail + office) is at final inspection. The mechanical scope includes two 40-ton chillers, VAV air handlers, a building automation system (BAS), and a service water heating system with a gas-fired boiler and recirculation loop.
373 words, about 2 min