Our latest home features 3E Argon Triple Glazed Lux Windows with a R Value of 8.1, Radiant In-floor heated basement floors with temperature control, 2 High Efficiency Furnaces on Main and Upper floors with 2 stage variable controls, R-50 Attic Insulation, Ener-spray Spray foam joists, R-20 lower perimeter wall Insulation, and Dual flush Toilets throughout.