Net positive energy with day to day transportation for 5 years running

Completion

Completion date
12/20/2011

Occupancy

Owner occupied. 4 full time occupants. 2 adults and 2 children. Both adults working. Children go to school. 5 weeks per year average unoccupied due to vacations. Occasional guests.

Days per year Building is fully occupied:
330

Scope

Type of Construction Retrofit
Number of buildings 1
Floor area of each building 2,670
Bedrooms 4
Bathrooms 3.0
Stories 1
Conditioned Building Volume 20,000 cu ft
Conditioned Floor Area 2,170 sq ft
Unconditioned Floor Area 500 sq ft

Location and Climate Details

Single-family residence

Address
18870 Barnhart Avenue
Cupertino, CA 95014
United States
Location Type Suburaban
Climate Region Zone 4
Köppen Climate Type Csb
Lat. / Long. POINT (-122.001994 37.315261)
Elevation 240 ft
Solar Insolation 5.35 kWh/m2/day
Annual CDD and Base Temp 30 | 80
Annual HDD and Base Temp 2649 | 65

Site

Site conditions:
previously developed land
Site description:

Normal suburban plot about 6000 sq ft. Street has houses on both sides. Backs to another similar house on a similar street at the back.

Materials and Design Strategy

Materials:

House built to California Code in 1997. Nothing special. Stucco on frame. Concrete slab. Insulation is wall and attic according to code. Double pane windows. Wooden doors. Has large south facing roof suitable for solar panels. Also not of South facing windows to let in winter sun.