Energy Efficiency

Energy efficiency involves a set of strategies that can be used to reduce the consumption of energy—especially fossil-fuel energy—in buildings. These strategies include:

  • monitoring energy use

  • improving building commissioning

  • applying insights from building science

  • selecting innovative HVAC and building envelope technology

  • using natural ventilation and daylighting to provide low-cost alternatives to standard systems

Energy Efficiency

Deep Dives

Get up to speed on complex topics. You can also earn CEUs and download PDF Spotlight Reports.

Quick Takes

Jump straight to the essentials with these short explanations of green building concepts.

Product Guidance

Unbiased information from our product experts helps you separate green from greenwash.

  • High-Efficiency Commercial Window Inserts

    Product Review

    Alpen’s WinSert commercial window inserts significantly improve the thermal performance of aging window systems, without the cost or aesthetic concerns of full replacements.

  • An Award-Winning Energy Management Outlet

    Product Review

    RAB’s Lightcloud Outlet enables wireless monitoring and control of plug loads while allowing for demand response and other energy-saving scheduling.

  • Innovative LED Lighting from LightFair 2018

    Product Review

    The LightFair innovation award winners showcase LED lighting’s evolving technology and how its sustainability image has changed.


  • Glass Façade with Vacuum Insulation

    Product Review

    Sedak’s Isomax system incorporates vacuum insulated panels into insulated glazing units to create thin glass façades with improved thermal performance.

In The News

We break news down to the essentials and provide expert analysis.


Thought-provoking opinions from the most trusted minds in sustainability.

Learning Resources

Syllabus supplements and CEU content, with automatic reporting for AIA and GBCI.

Just For Fun

Something weird happens every April at BuildingGreen...