Large buildings not only have large HVAC Systems but also large volumes of air that if allowed to get hot or humid, take a longtime to recover to comfortable temperatures. For this reason, many Stadiums, Convention Centers and other large buildings run AC 24X7 so as not to “lose the building” get hot or humid. The big HVAC systems at stadiums use an incredible amount of water. A SmartWaterValve installed on the incoming water line can pay for itself very quickly and contribute to lower operating costs.