Edminster-Bohner Deep Energy Retrofit
Completion
Occupancy
Private owner, owner-occupied single-family detached home. Three permanent occupants. Two home offices; home occupied 24/7, with the exception of infrequent family vacations. Frequent visitors, including a part-time contract worker.
Scope
Renovation of various parts/aspects of existing ~1,400 sf home plus 2005 addition of ~200 sf.
Type of Construction | New - still under construction |
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Bedrooms | 3 |
Bathrooms | 2.5 |
Stories | 2 |
Conditioned Floor Area | 1,600 sq ft |
Unconditioned Floor Area | 400 sq ft |
Location and Climate Details
Address |
115 Angelita Avenue Pacifica, CA 94044
United States |
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Location Type | Suburaban |
Climate Region | Zone 3 |
Köppen Climate Type | Csb |
Lat. / Long. | POINT (-122.476548 37.613796) |
Solar Insolation | 7 kWh/m2/day |
Annual CDD and Base Temp | 125 | 65 deg F |
Annual HDD and Base Temp | 2941 | 65 deg F |
Site
Hillside site on uphill side of street; west-facing. High corner @ NE, low corner @ SW, steep in those two corners, terraced throughout.
Materials and Design Strategy
o Roofing: steel in sloped areas, highly durable five-ply built-up roofing under living roof in flat area
o Interior wall finishes: low-VOC paints and earth plasters
o Decking: FSC-certified, highly durable tropical Machiche
o Windows: energy-efficient, durable, steel-clad wood
In order to get heating system into conditioned enclosure, replaced old forced-air furnace with hydronic system including high-efficiency Munchkin boiler that provides both space heating and DHW. Radiant floor downstairs, Runtal wall radiators upstairs. Replaced single-paned aluminum windows in downstairs with wood double-paned, clad windows. Insulated downstairs walls with rigid polyiso in the framing cavities; recently (spring 2015) insulated the downstairs attic with loose-fill R-40 Havelock Wool. Put vapor barrier in crawl space.