ECO4’s Whole home approach is predicated on insulation. You’ll dependant on the house receive loft insulation, wall insulation, under the floor insulation and external wall insulation. By these measures warmth is trapped inside your property and so warmth loss is diminished Hence, it's cheaper to remain heat. Jonathan Marshall ECO4 https://www.reddit.com/user/energy_saving_grants/comments/1awtkkn/types_of_grants_you_can_apply_from_eco_grants_uk/