Learn the latest from C4SB at AHR

Las Vegas Convention Center

Feb 2, 3, 4, 2026

Visit us at the LonMark International Booth C743

A lot of work is underway at C4SB to identify, collect, build, and publish open standards and open resources for delivering an Open Building Stack for smarter buildings.

Come by Booth C743 to hear about the topics that could help you get or deliver smarter building solutions the OPEN way.

More Info

OPEN THE WORLD
TO SMARTER BUILDINGS

No more locked data, choices, value, or experiences in buildings.

The Coalition for Smarter Buildings Foundation (C4SB) is the global community dedicated to creating, collecting, and sharing open technology, data, and standards to solve common challenges and unlock higher value, choices, and opportunities for building owners, operators, occupiers, and vendors.

Why C4SB?

C4SB provides an independent community to build open digital resources that transform the lifecycle of buildings.

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Get Started

Get acquainted with the community and projects and how you can get involved.

GET STARTED

Projects

C4SB Foundation projects are helping transform how buildings and what happens inside them are digitally connected over their entire lifecycle, accelerating delivery of better experiences, more efficient operations, and higher value.

EXPLORE PROJECTS

Featured Projects

The Semantic Buildings project explores and tests the integration of different open-source semantic models to create useful knowledge for improved building design and operation.

Explore Project

The Asset Leadership Standard project helps establish the “Why?” Why is it beneficial for top leaders to have smart assets talk with each other and outside markets such as the energy grid?

Explore Project

The Interoperable Building Box (IBB) project is developing an open digital architecture that enables cloud-native, on-premises data exchange between applications.

Explore Project

The Managed BACnet project is addressing technology and implementation challenges for deploying BACnet into cloud-native buildings.

Explore Project

Transforming Digital Management of Buildings

Solutions built on the open standards and open source components championed by the C4SB community are delivering higher value, more efficient operations, and a better experience to real buildings today.

Featured Solutions

Coming soon.

Ready to open your buildings or building solution?
Join our foundation of doers.

Members

Building and selling smart building solutions?

Shape the ecosystem and drive cross-company collaboration.

BECOME A MEMBER

Contributors

Looking to get involved?

From coder to creatives, join our global community and advance C4SB open building projects.

START CONTRIBUTING

Owners & End Users

Looking for open smarter solutions?

Accelerate your adoption in close collaboration with peers, project maintainers, and C4SB

JOIN THE COMMUNITY

Our Members

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Learn the latest from C4SB at AHR

OPEN THE WORLD TO SMARTER BUILDINGS

Projects

Featured Projects

Transforming Digital Management of Buildings

Featured Solutions

Ready to open your buildings or building solution? Join our foundation of doers.

Our Members

Latest from C4SB

Stay connected with the latest from C4SB

OPEN THE WORLD
TO SMARTER BUILDINGS

Ready to open your buildings or building solution?
Join our foundation of doers.