Nightingale

How does Nightingale compare with other K-12 school buildings in Chicago?

The latest disclosures cover 543 K-12 school buildings in Chicago, out of 3,852 buildings citywide. Nightingale's ENERGY STAR score of 10 compares with an average of 45 across the 365 that report a score; it scores higher than 8% of them and lower than 92%. Its site EUI of 99.3 kBtu/ft² is about 37% above the average of 72.7 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 8.7 kgCO₂e/ft² is about 40% above the group average of 6.2 kgCO₂e/ft².

At 140,838 sq ft, it is about 16% above the average floor area of 121,824 sq ft for those buildings. It was built in 1926, 17 years earlier than the group's average year built (1943). Across all 24 jurisdictions BuildingCensus covers, the 6,548 K-12 school buildings average an ENERGY STAR score of 64 and a site EUI of 52.7 kBtu/ft².

How has Nightingale's energy performance changed over time?

BuildingCensus holds 9 Chicago disclosures for Nightingale, covering report years 2015–2023. Its ENERGY STAR score went from 53 in 2015 to 10 in 2023 (-43 points); its best year on file was 2015, at 53. Site EUI moved from 65.6 kBtu/ft² (2015) to 99.3 kBtu/ft² (2023), an 51% increase. Reported emissions went from 1,101 tCO₂e to 1,231 tCO₂e over the same span (up 12%).

What does an ENERGY STAR score of 10 mean?

ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 10 means the building performs better than about 10% of its national peers. BuildingCensus bands the score into report-card grades; 10 falls in band D — lowest band (1–54). It sits 65 points below 75, the threshold for ENERGY STAR certification. In Chicago, 35% of scored buildings are at 75 or above.

Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. Nightingale's 99.3 kBtu/ft² across 140,838 sq ft works out to about 14 billion Btu (4,099 MWh-equivalent) in 2023. Its source EUI of 174.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,647,189 kWh of electricity and 83,660 therms of natural gas for the year.

Which law requires Nightingale to report its energy use?

Nightingale reports under the Building Energy Use Benchmarking Ordinance, the legal basis of the Chicago Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2023 disclosure (source record chicago:251692:2023). Covered buildings that fail to benchmark and report face fines of up to $100 plus $25 per day of violation under the ordinance.