Chapter 17 — GEOTHERMAL ENERGY SYSTEMS AND AMBIENT TEMPERATURE LOOPS
1716.1 General — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Mechanical Code (Title 24, Part 4) § 1716.1 · Effective January 1, 2026 · Official source: Building Standards Commission
An Ambient Temperature Loop (ATL) distributed energy system shall be installed in accordance with Section 1716.1.1 through Section 1716.6.3 and Section 1717.0. ATL systems shall comply with Part I through Part IV of this chapter, as applicable.
1716.1.1 Fourth Generation (4G) System Config- uration. A fourth-generation system configuration shall be a district geothermal energy system distributing hot water, cold water, or both to the conditioned space or building for a specific use. Where a geothermal energy source is used, such system shall comply with Part I through Part IV of this chapter, Chapter 11, and Chapter 12.
1716.1.2 Fifth Generation (5G) System Configu- rations. An advanced Ambient Temperature Loop (ATL) System or fifth generation (5G) ATL system shall also be capable of interacting with the electric utility system as well as other utility systems and systems compo nents.
The system components shall include, but not limited to, the following:
(1) Thermally diverse buildings with independent hydronic systems
«
«
«
«
GEOTHERMAL ENERGY SYSTEMS AND AMBIENT TEMPERATURE LOOPS
(2) Circulation loop
(3) Global control system
(4) Segment isolation capability
The system components may include, but not limited to, the following:
(1) Electric grid-interactive enabled buildings
(2) Hybrid components
(3) Other renewable systems
Get a plain-English answer with a citation back to this text.
Ask AI about this code