Energy Efficiency

To address increasing energy costs, and worldwide growth in energy demand, we need effective energy-saving solutions. Since the 1970s, Berkeley Lab has been a world leader in advancing energy-efficiency breakthroughs across the building, water, and transportation sectors. We’re working closely with industry, government, and policymakers to develop technological and systems solutions that increase energy efficiency, save money, and protect human health and safety.

FLEXLAB®

The sun obscured behind smokey skies over a blue building.

A testing facility for energy-efficient building technologies.

Demand Flexibility

Three people in safety gear standing in front of a truck.

Researching technologies, software, programs, and market incentives to advance a more reliable grid whose power is more affordable for customers.

Energy-Efficient Windows

Upward view of a high-performance window system with sun shining in the background.

Berkeley Lab’s advanced technologies and software tools are the world standard in increasing the energy efficiency of windows and buildings.

Energy Efficiency in Buildings

Upward view of a building with a colorful overlay.

Researchers are developing critical performance monitoring tools, providing energy and facility managers with new analysis and visualization capabilities.

Building Technology and Urban Systems Research

Berkeley Lab is developing data and technologies that increase energy efficiency and improve the health, safety, and comfort of building occupants in the U.S. and worldwide.

Energy Modeling and Simulation

Berkeley Lab is developing software that supports the efficient design and operation of buildings, as well as future systems that can save energy and money.

Heat Island Research

Aerial view of white roofed homes and streets forming circular patterns.

Researchers are developing new strategies to cool buildings and cities by making roofs, pavements, and cars cooler in the sun.

Energy Management Systems

Interior view of an energy management laboratory with yellow and grey machinery.

This team develops and deploys evidence-based energy management solutions to help organizations achieve their energy-related objectives.

Electricity Markets and Policy Group

This group conducts unbiased research, analysis, and technical assistance on energy-efficiency markets and policies.

Person with long, braided dark hair wearing silver hoop earrings and a green and white shirt.

"Commercial and residential buildings account for approximately $375 billion of energy usage per year in the United States. Our research focuses on developing innovative building technologies, tools, and modeling and simulation methods that increase energy efficiency, save money, and improve health and safety for building occupants."

Regnier is the Whole Building Systems Department Head and FLEXLAB® Executive Director at Berkeley Lab. Regnier also manages several research projects focused on community scale deployment of coordinated grid interactive efficient buildings, and deployment of low energy systems and technologies.

A smiling person in a yellow and black plaid shirt.

As a senior energy technology researcher, Joshua leads a large research program focused on applied research, demonstration and deployment projects used to accelerate the adoption of building energy efficiency, cost reduction, demand flexibility – in the commercial building sector, for existing buildings retrofits and operational practices.

Modern data technology center server racks working in a lit room.

From expert analyses and energy-saving computer models to supercomputers with built-in cooling technologies, Berkeley Lab is driving innovation toward energy-wise data centers. Here are seven ways the Lab is helping U.S. data centers run more reliably.

Art Rosenfeld, a physicist and Berkeley Lab Distinguished Scientist Emeritus, transformed the fledgling field of energy efficiency from a research afterthought into a scientific discipline.