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No. 1722 Project 159 Allston Street Status Pre-certified
Lead CPHC Ian Johnson
Builder KBS & Nauset Location Cambridge, MA
QA/QC Rater Michael Browne Architecture Planning Mechanical Systems Designer
Constr. Type Timber Bldg. Function Multifamily Floor Area 3689
Project Type New Construction HERS Index LEED Rating
Energy Star Rating Heating Degree Days Cooling Degree Days
Units 3 Certification Type PHIUS+2018 Certification Date
Exterior Wall Split wall timber frame construction, 2x10s with blown in cellulose (R-21) with Zip-R sheathing system installed at the exterior (R-12)
Floor Floor above unconditioned basement R-30 Batt Insulation
Roof 11-1/4 open web floor joists filled with R-40 fiberglass insulation. Exterior Insulation is 5" continuous XPS insulation on the roof (R-30) with additional layers of tapered insulation above that.
Window Frame Kohltech
Window Glazing Kohltech
Entrance Door TBD
Ventilation Zehnder ERVs 1 per unit.
Heating System Mini-Split heat pumps
Submitter Ian Johnson
Air-tightness 0.06 cfm/sf (targeted)
Cooling System
Additional Consultants
Additional Notes

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