Los Altos Modern Passive House

A modern home under construction in Los Altos built to Passive House standards has triple pane windows, bib insulation in the walls, rockwool insulation outside of the walls, and open-cell spray foam in the ceilings surmounted by rigid insulation within the roof assembly. The R-Guard by Prosoco air barrier is shown in the photo along with Roxul insulation. The large underfloor is conditioned and has enough room to house two Zehnder HRVs. This home, which is connected to the grid, is self-powered with electricity from solar panels on the flat roof and two Tesla Powerwall backup batteries. Natural gas provides fuel for hot water and decorative fireplace. Home heating is provided by a hydronic heating system and cooling is provided by an automated Lutron shading system and conventional air conditioning.