Thomas Phillips, the Principal of Healthy Building Research poses a question during the Builder Panel Roundtable at the 2017 Beyond Energy Efficiency Conference. (Photo courtesy Build It Green)

Thomas Phillips, the Principal of Healthy Building Research poses a question during the Builder Panel Roundtable at the 2017 Beyond Energy Efficiency Conference. (Photo courtesy Build It Green)

Thomas Phillips, the Principal of Healthy Building Research poses a question during the Builder Panel Roundtable at the 2017 Beyond Energy Efficiency Conference. (Photo courtesy Build It Green)