Alamo Passive House

PROJECT
Project Name:	Alamo Passive House
Completion Date:	2015
Building Type:	Single Family Home
Project Description:	New construction on vacant lot allowed us to orient this project perfectly to maximize solar access for renewable generation. The owners requested a New England Colonial style home, with modern interiors. The lot allowed us to design a detached garage and the design brief encouraged an optimized building form-factor, making it easy to reach 0.3ACH n50 for the blower door test. A simplified mechanical system with ventilation air provided through the same ducts as the heating and cooling system, further optimized the performance of this home. Monitoring data is showing this home performing as a 'plus' energy home with a 7.2 kW array able to easily net out the home and vehicle energy generation needs.
Location:	Laverock Lane 94507 Alamo, CA
No. of units:	1
Construction Type:	Single family home
Construction Cost:	$375

TEAM
Owner:	-
Architect/Designer:	Bronwyn Barry
Engineer/s:	Sezen Moon Structural Engineering
PH Consultant:	Allen Gilliland & Bronwyn Barry
Contractor:	One Sky Homes
Other:
Miscelaneous:

PREDICTED PERFORMANCE		METRIC VALUES
Treated Floor Area:	2342 ft2	218 m2
Typical Calc. Area:	3000 ft2
Exterior Walls:	28.45 hr.ft2.ºF/BTU	0.200 W/m2K
Floor/Slab:	13.78 hr.ft2.ºF/BTU	0.412 W/m2K
Roof:	46.34 hr.ft2.ºF/BTU	0.123 W/m2K
Overall Window:	5.02 hr.ft2.ºF/BTU	1.131 W/m2K
Window Frame:	4.89 hr.ft2.ºF/BTU	1.161 W/m2K
Window SHGC:	0.48	0.48 %
Entry Door:	4.00 hr.ft2.ºF/BTU	1.4195 W/m2K
Ventilation:	80.60 %	80.60 %
Heating Source:	Heat Pump
Cooling Source:	Heat pump
Hot Water Source:	Heat Pump
Airtightness:	0.30 ACH50	0.30 ACH50
Green materials:	Foamglass perimeter insulation at foundation, mineral wool exterior insulation.
Annual Heat Demand:	3.40 kBTU/ft².yr	10.73 kWh/m2yr
Heating Load:	3.16 BTU/ft².hr	9.97 W/m2
Primary Energy Value:	24.09 kBTU/ft².yr	75.99 kWh/m2yr