Steam or other vapour generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super heated water boilers
Coirí a ghineann gal uisce nó gala eile (seachas coirí uisce te le haghaidh téamh lárnach is féidir gal uisce a ghiniúint faoi lagbhrú freisin); coirí uisce forthéite