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.
నివాస ప్రాంతాల్లో HVAC వ్యవస్థ ఎంత శక్తిని ఉపయోగిస్తుంది?
50% (10.1 EJ/yr)