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No. 1209 Project Harrison Street Passive House Status Pre-certified
Lead CPHC Izumi Kitajima
Builder O'Neill Development, Inc. Location Rockville, MD
QA/QC Rater Architecture Planning Peabody Architects Mechanical Systems Designer Foley Mechanical, Inc.
Constr. Type Timber Bldg. Function Single Family Floor Area 4024
Project Type New Construction HERS Index LEED Rating
Energy Star Rating Heating Degree Days 4967 Cooling Degree Days 1137
Units 1 Certification Type PHIUS+ Certification Date
Exterior Wall 6 1/2" SIPs with 4" EIFS above grade. 10" concrete with 5" EPS rigid foam outside, 2" EPS rigid foam with 5 1/2" Formaldehyde-free batt insulation inside.
Floor 4" concrete slab with 4" EPS foam below.
Roof 12 1/4" SIPs.
Window Frame Zola Thermo uPVC: 0.18 U-value.
Window Glazing Zola triple glazing. 0.5 SHGC at North and South windows, 0.09 U-value. 0.29 SHGC at East and West windows, 0.11 U-value.
Entrance Door Zola Thermo wood door: 0.19 framing U-value, 0.5 SHGC and 0.09 glazing U-value.
Ventilation Zendher ComfoAir 550 ERV
Heating System Mitsubishi 18,000 btu heat pump dials down to 6,000 btu. (1) ducted minisplit for attic and second floor; (1) for basement and first floor.
Submitter Izumi Kitajima
Air-tightness 0.6 ACH50
Cooling System Mitsubishi 18,000 btu heat pump dials down to 6,000 btu. (1) ducted minisplit for attic and second floor; (1) for basement and first floor.
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