There are 3 major components to the "Low Energy Requirement Home" system: A six-sided performance R38 insulation envelope. It consists of 2 separate layers of 2" thick Thermax (a foil covered urethane) with joints staggered and foil taped. This results in a structure that needs less than one-seventh the energy of the typical new house. The long house wall orientated south with more glass south (not a huge amount) and less glass in the north wall. The excess winter sunny day input (which could result in over heating) justifies an air-integrated heavy mass storage system. A fan moves air from the higher house areas, down an airshaft through high capacity MERV 8 filters, and through an extensive grid of air pipes located in mass storage consisting of 12" of concrete under the lowest floor.