Watch VoirFilms. Guy's rolling up his sleeves as he explores how to make your home cheaper to heat. Using all his engineering experience, can Guy make energy bills a thing of the past?. He will start by looking at insulation and banishing those drafts with the aid of an air tester. Nothing is left to chance with triple-glazing, solar panels, battery storage and even the unfairly maligned 'Heat Source Pumps'.