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Introducing Div2525

Div2525 was inspired by Division 25 of the CSI MasterFormat, a classification system used in the US and Canada for the specifications for construction trades. Div2525 can be used to create a formal Division 25 specification; it can also be used outside of the MasterFormat system.

The goal of Div2525 is to facilitate the collecting, exchange, and use, of data across multiple building systems, enabling building owners to make these systems more interoperable, and their buildings smarter.


Div2525 supports many goals including:

  • Improving sustainability

  • Lowering total cost of ownership

  • Increasing operational efficiency

  • Providing better user experiences for the building's stakeholders

Div2525 enables building owners, engineers, contractors, and master system integrators, to accurately specify the resources required to make their buildings smarter.​

About Div2525

Div2525 Resources

Introduction Document v1.1

Most people will find this part the most useful: get an overview of interoperability for smarter buildings, how to ask for it, and what each of the full document’s sections covers. 

Full Framework Document v1.1

This is the full Div2525 Framework, with sections describing in more detail each layer of a smarter building solution. The full document is useful for those creating detailed specifications for projects, or designing or promoting products and services that are intended to fit together following the intended data architecture.

Div 2525 is based on C4SB's 'Smarter Stack' framework:
How Div2525 makes Buildings Smarter

Div2525 is a part of the project specification process that can be used to describe how to facilitate the collecting, exchange, and use, over time, of data across multiple building systems, enabling owners to make their buildings smarter and achieve goals such as sustainability, lower total cost of ownership, higher operational efficiency, and a better user experience.

Owners and operators of buildings, whether building, retrofitting, or operating them, should consider these requirements and incorporate them into their building’s design, construction, and operations.  Getting the most out of your “smarter” buildings can be complicated, but being proactive as early as possible (ideally when you start to imagine your next project) maximizes the potential value while keeping the costs of doing so as low as possible.  Following this guide can help organize and inform your team so that you get what you, your operators, and your occupants want/need, you reduce confusion and change orders, and you end up future-ready for unknown things to come.

What is a Smarter Building?

For our purposes, a building can be called “smarter” if its building systems’ data are interoperable and interconnected, to enable monitoring, verification, operation, and control, using a unified data architecture where data from one system can be exchanged with other systems as well as higher level business applications, services, and tools.  

Simply put, Smarter Buildings enable buildings to provide greater comfort and productivity for occupants, greater visibility and control for the operations and management teams, and lower costs, better business outcomes, and higher value for owners.

The Smarter Stack

The Smarter Stack is a framework for designing and understanding interoperable building automation systems that make buildings smarter. 

Who's Contributing to Div2525?

This Div2525 Framework was created by volunteers with deep experience designing and delivering smarter building solutions.


If you have contributed to this effort or would like to, and want to be included on this list, please let us know at

Writing and Editing Team

Ron Bernstein

Anto Budiardjo

Tristan de Frondeville

Steve Fey

Michael MacMahon

Peter Scanlon

David Wilts

Contributors and Reviewers
Ernie Beck
Bill Behn
Rolf Bienert
Rich Blomseth
Charlie Buscarino
Robbie Danko
Don Elder
Gina Elliott
Neil Gifford
Fred Gordy
Terry Herr
John Huston
Scott Hoffman

Rick Justis

David Kniepkamp

Brad Kult

Jim Lee

Tracy Markie

Marc Petock

John Petze

Andrew Rogers

Ken Sinclair

Anno Scholten

Craig Stevenson

Matthew Turk

Mark Verheyen

Ben Wallace

Roger Woodward

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