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Ross Residence

Walls and Roof

Subslab assembly

Existing slab was retained; no sub-slab insulation installed.
Slab edge assembly

Existing slab was retained; no slab-edge insulation added.
Foundation wall assembly

Brick and Fieldstone foundation wall insulated to the inside with closed cell spray foam to R-30 (5 inches)
Foundation wall R-value 30.0
Above grade wall assembly

R-33+. Existing Above Grade Walls - 4” studs with existing board sheathing – retained. New Walls with 2x6 framing.
All walls insulated to the outside with (2) 1.5” layers of foil-faced polyiso, staggered and taped at all seams as air barrier.
Walls insulated to the inside with 4” (or 5.5”) Open Cell Spray Foam. Here, the use of open cell foam avoids a double vapor barrier at the above grade framing and sheathing, and provides further air barrier adhered to the existing board sheathing.
Above grade wall R-value 33.0
Flat attic assembly

Small portions of the third floor have flat ceilings, with lighting and refrigerant piping concealed above.
Cathedral ceiling assembly

Entire roof re-framed with 2x12 rafters to provide deep cavity for cellulose. Insulated to the outside with the same 3” of polyiso for an R-54 roof assembly.

Windows and Doors

Window Assembly:

49 windows from Fibertec, Casement 300 series. U-values range from 0.13 – 0.18 for fixed, awning, and casements.

Door Assembly:

2 doors from Fibertec, 200 series, Triple-pane, low-e. 1 door from Simpson (Model 7008 w/ insulated glass)

Average window U-factor 0.15

Mechanical Systems

Space cooling - Manufacturer & Model Air-source heat pump by Mitsubishi – VRF City Multi (One PUMY R410A S-series outdoor unit, Two PKFY wall-mounted indoor units, and Three PDFY ceiling concealed indoor units)
Space heating - Manufacturer & Model Air-source heat pump by Mitsubishi – VRF City Multi (One PUMY R410A S-series outdoor unit, Two PKFY wall-mounted indoor units, and Three PDFY ceiling concealed indoor units)
Domestic hot water - Manufacturer & Model Air-source heat pump hot water heater by SteibelEltron (80 gal. Accelera 300)
Domestic hot water - capacity 80 gal
Ventilation - Manufacturer & Model VenmarHRV EKO 1.5 (Model No. 43900)
Lighting Manufacturer and Model 46 Juno LED cans
Lighting Efficiency
Mechanical Equipment Installation Details and Comments

Lighting in the house is predominantly achieved through 46 Juno LED cans. In bedrooms and in bathrooms, ceiling mounts and sconces use CFLs and halogens. Total lighting is 0.88W/sf.