However, the absence of a harmonised strategy at Union level, the lack of internalisation of external costs and the fragmentation of heating and cooling markets have, to date, led to relatively slow progress in the sector.
In éagmais straitéis chomhchuibhithe ar leibhéal an Aontais, easpa inmheánaithe na gcostas seachtrach agus ilroinnt na margaí téimh agus fuaraithe, áfach, tá an dul chun cinn san earnáil seo mall go leor go fóill.