ASHRAE-90.1-2022- - Page 183

Extracted Content

11. ADDITIONAL EFFICIENCY REQUIREMENTS

11.1 General

a. HVAC systems that account for more than 50% of the capacity serving either the heating or cooling loads

of the alteration area. This includes HVAC unitary systems, HVAC terminal units, or components of HVAC central heating or cooling equipment, not including ductwork or piping . HVAC terminal units, for the purposes of this section, can include VAV boxes, fan-coil units, VRF room units, or water-loop heat pumps. b. Fifty percent (50%) or more of the luminaires in the alteration area c. Twenty-five percent (25%) or more of the building envelope area of the alteration portion of the build-

ing, including new exterior cladding, fenestration, or insulation

Informative Note: Substantial alterations are intended to include a major renovation of part or all of an existing building that extends the life of the building and includes major replacement of at least two major building systems .

11.1.4.2 Initial Build-Out Construction. The building envelope, equipment, and systems in initial build-out construction exceeding 1000 ft [2] of gross floor area in buildings where the alteration did not have final lighting or HVAC systems installed under a prior building permit shall comply with the requirements of Section 11.2.

ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 181