According to the Environmental Protection Agency (EPA), indoor environmental quality (IEQ) refers to the quality of the air and environment inside buildings. IEQ is based on conditions that can affect the health, comfort and performance of occupants— including pollutant concentration, temperature, relative humidity, light, sound, and other factors. Good IEQ is an essential component of any building.
Today’s buildings and structures have more open floor space and longer, unsupported spans. The heavier loads transferred by these structures may require the use of deep foundations to provide reliable and settlement-tolerant support.