What is ASHRAE Guideline 14?
ASHRAE Guideline 14 gives procedures for measuring energy, demand and water savings from conservation projects by comparing measured use with a statistically tested baseline model adjusted for conditions.
Who relies on Guideline 14
Energy service companies, utility program administrators, performance contract parties and owners cite it when a savings figure has to survive review by the other side. It covers whole-building, retrofit isolation and calibrated simulation approaches across residential, commercial, institutional and industrial buildings, and it leaves out major industrial process loads and sampling for large demand-side programs.
Edition and model statistics
ASHRAE lists Guideline 14-2023 as the current edition, superseding the 2014 version. The guideline judges a baseline model with fit statistics such as CV(RMSE) and normalized mean bias error before its savings are trusted. The acceptance limits sit in the purchased text, so contracts should quote them directly.
The baseline model behind Aqueduct's savings figure
Savings in aQ EnergySmart follow the same structure: consumption regressed on cooling and heating degree days, with weather pulled for the site's own location, then compared with metered actual use. A reviewer can trace each figure back to interval data and to the rate configuration that turns kWh into money. Acceptance against Guideline 14 criteria remains the reviewer's decision.