Fi-Foil HY-Fi® Hybrid Wall & Ceiling Insulation was specified as a vital component in the attic and wall insulation systems in The New American Home 2020. In the unvented and air-sealed attic, HY-Fi® was used in combination with Demilec Sealection® 500 for a total insulation value of R-48. In the walls, the combination of products created an R-23 total insulation value.