A heat transfer composition comprises trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)), difluoromethane (R-32) and 1,1,1,2-tetrafluoroe.thane. (R-134a). The composition preferably has a low GWP and may further comprise a lubricant, a stabiliser or a flame retardant. The composition may be a refrigerant, a blowing agent, a foam or a sprayable composition. The composition may be used in a heat transfer device e.g. automotive air conditioning systems, chiller refrigeration systems. Also shown are methods of cooling, heating, extraction and cleaning using the composition.L'invention porte sur une composition de transfert de chaleur comprenant du R-1234ze(E), du R-32 et du 1,1,1,2-tétrafluoroéthane (R-134a).