The council offers a 24-hour chargeable service for clearing blocked drains we aim to get to you within four hours of a call for assistance. Do you want an easy, hassle free experience? then choose heat-plex to save more and worry less! Anyway, although they have a slightly higher initial outlay than other. Advice for other parts of the uk. Gas-fired floor-standing boiler with stainless steel inox-crossal heat exchanger and matrix dome gas burner rated input: 19 to 199 mbh.