In the United States, heating, ventilation and air conditioning (HVAC) systems account for 30% (4.65 EJ/yr) of the energy used in commercial buildings and nearly 50% (10.1 EJ/yr) of the energy used in residential buildings. Solar heating, cooling and ventilation technologies can be used to offset a portion of this energy. COUNT 4
QSN1 What percentage of energy in commercial buildings comes from HVAC systems? ANS1 50 QSN2 How much energy does an HVAC system use in commercial locations? ANS2 30% (4.65 EJ/yr) QSN3 How much energy does an HVAC system use in residential locations? ANS3 50% (10.1 EJ/yr) QSN4 What can be used to balance out a portion of the energy used by HVAC systems? ANS4 Solar heating, cooling and ventilation technologies