Taking　a　dormitory　building　in　Beijing　as　an　example,　this　paper　presents　researches　about　impacts　of　radiator　selection　on　indoor　thermal　environment　and　energy　consumption　for　space　heating　by　using　DeST-h　software.　Simulation　results　quantitatively　indicate　the　variation　of　heating　effect　with　radiator　type　(cast-iron　radiator,　steel　radiator　and　copper-aluminium　radiator),　radiator　size　and　water　flow　rate.　Moreover,　the　negative　impact　of　water　flow　rate　under　design　value　on　indoor　thermal　environment　has　been　highlighted,　by　which　the　suggestion　to　have　better　understanding　about　the　hydraulic　misadjustment　degree　of　heat　pipeline　has　been　given.　Additionally,　cast-iron　radiator　has　been　demonstrated　to　be　better　than　the　new　type　of　copper-aluminium　radiator　in　terms　of　room　air　temperature.　(C)　2016　The　Authors.　Published　by　Elsevier　Ltd.