EnergyPlus History: CZ2025 DEER Peak 3-Day Period Lookup Table

File	Start Date	End Date	Date posted	Notes
peakperspec_cz2025.csv	2028 Jan 1		2026 Mar 10	A lookup table is provided that identifies the peak 3-weekday period for each of the 16 California climate zones (CZ01–CZ16) for use with CZ2025 weather and DEER peak-day analysis. One row per climate zone. - Source weather: CZ2025 EPW files (16 zones). - Calendar: 2009; all 10 observed 2009 holidays excluded. Candidate windows are consecutive 3 weekdays (Mon–Wed, Tue–Thu, or Wed–Fri) in June–September, starting at midnight. - Selection: The period with the highest equal-weight index (Peak dry-bulb + 72-hour average dry-bulb + noon–6 PM average dry-bulb) is chosen per zone. Assumptions (hour and period definitions): - Hour convention: Hours are 0–23 (midnight = 0, noon = 12, 6 PM = 18). Each hourly value is interpreted as the dry-bulb temperature at the **start** of that clock hour (e.g. hour 12 = 12:00, hour 17 = 17:00). (In EPW 1–24 convention, hour 1 = 00:00–01:00, so EPW hour *h* corresponds to clock hour *h*−1 start; the analysis uses 0–23 internally.) - 72-hour window: Starts at **midnight** (00:00) of the first day of the 3-day period. The window comprises 72 consecutive hours: hour 0 through hour 23 of day 1, hour 0–23 of day 2, hour 0–23 of day 3. No other start hour is used. - Noon–6 PM band (“12–6p”): Exactly **6 hours**: hour 12, 13, 14, 15, 16, 17 (i.e. 12:00, 13:00, 14:00, 15:00, 16:00, 17:00). Hour 18 (18:00) is **not** included. The noon–6 PM average is the arithmetic mean of the dry-bulb values in those 6 hours over the 3 days (18 values total). - Peak dry-bulb: Maximum of the 72 hourly dry-bulb values in the 72-hour window. - Equal-weight index: Sum of (1) peak dry-bulb, (2) 72-hour average dry-bulb, and (3) noon–6 PM average dry-bulb, all in °C. The candidate 3-day period with the **largest** value of this sum is selected per climate zone.