Scenes from the 2014 World Energy Engineering Congress in Washington, D.C.

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.

Switching from in-pipe metering to clamp-on ultrasonic metering.

Twin Cities contractor Aabott Ferraro helped retrofit an older St. Paul home.

The 2014 ACI National Home Performance Conference & Trade Show was held in Detroit.

An array of images from the 2014 Nexstar Network Spring Meeting in Boston.

Photos from the 2014 ACCA Conference & IE3 Expo in Nashville, Tenn.

Scenes from the 2014 MCAA Annual Convention in Scottsdale, Ariz.

Highlights from the National Comfort Institute Summit 2014 in Orlando, Fla.