Abstract
Ground Source Heat Pump system (GSHPs) has a possibility to reduce environmental load in Southeast Asia. However, GSHPs has not been introduced in Southeast Asia except experiment facility. In order to know effectiveness of GSHPs in Bangkok, life cycle assessment and cost evaluation was conducted to compare with Air Source Heat Pump system (ASHPs). As a result, life cycle environmental load and economic cost of GSHPs was less than that of ASHPs. Therefore, the result showed that the introduction of GSHPs in Bangkok leads to reduction of environmental load and have an advantage in terms of economic point of view.