A radon gas reduction system on the outside of a residential building in Philadelphia, Pennsylvania, United States.

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Size: 3456px × 5184px
Location: Philadelphia, PA, United States
Photo credit: © Maurice Savage / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 2190, device, extraction, fan, fantech, gas, hp, level, pennsylvania, philadelphia, piping, power, pump, radon, reduction, safety, states, street, system, united, ventilator