Walls and Roof

Interior rigid insulation at existing walls and first floor slab-on-grade. Exterior rigid insulation at roof. Combination of interior and exterior fluid-applied air barriers to existing masonry.

Subslab assembly

Existing approx. 6" concrete slab, 1.5" type-9 EPS, poured concrete finish floor.

Subslab R-value 7.5
Slab edge assembly

existing

Foundation wall assembly

none

Above grade wall assembly

acrylic stucco w/ fluid-applied integral air barrier, existing 8" CMU, 2 layers 2.75" salvaged polyisocyanurate insulation, metal furring, 5/8" GWB.

Above grade wall R-value 33.0
Roof Assembly

existing horizontal wood joists with wood overframing and plywood decking. 11" salvaged polyisocyanurate insulation, cement board and fluid-applied roofing system.

Roof R-value 66.0

Windows and Doors

Window Assembly:

Shuco aluminum Passive House exterior windows with triple glazing.

Door Assembly:

Shuco aluminum Passive House exterior windows with triple glazing or insulated opaque panel.

Mechanical Systems

Space cooling - Manufacturer & Model Misubishi air-source heat pump
Space heating - Manufacturer & Model Misubishi air-source heat pump
Domestic hot water - Manufacturer & Model Rheem electric hot water tank MR50245
Domestic hot water - capacity 50 gal
Ventilation - Manufacturer & Model Zhender Comfoair 350
Lighting Manufacturer and Model Phillips LED
Lighting Efficiency

Envelope

Air Changes per hour, ACH50 1.00 ACH50
Air Changes per hour, CFM50