Delphi Haus
Building Use: Detached single-family residence
Project Type: New passive house building
Northwest Contemporary 3 bedroom, 2 1/2 bath, private residence hidden in the hills of Western Washington. Designed and built for a young couple looking towards very specific future medical needs. Mobility, fall protection and an avoidance of direct natural light are critical programmatic needs. Brightly painted interior soffits allow solar gain while diffusing the direct sunlight into a golden glow. Constructed using Universal Design throughout, the house allows easy access and visual ties to the beautiful surroundings.
| Location: | Olympia, Washington 98506 | |
| Dwelling Units: | 1 | |
| PH Calculation Protocol(s): | PHIUS+ | |
| PH Modeling Software(s): | PHPP | |
| PH Certification(s): | PHIUS | |
| Year Of Construction: | 2017 | |
Project Size | ||
| Floor Area: | 2,288.0 ft2iCFA | 212.6 m2iCFA |
Performance | ||
| Heating Degree Days: | 5,714 °F•day/yr | 3,174.4 °C•day/yr |
| Annual heat demand: | 5.62 kBtu/yr•ft2iCFA | 17.7 kWh/yr•m2iCFA |
| Heat load: | 2.76 Btu/hr•ft2iCFA | 8.7 W/m2iCFA |
| Annual cooling demand: | 11 kBtu/yr•ft2iCFA | 34.7 kWh/yr•m2iCFA |
| Cooling load: | 0.60 Btu/hr•ft2iCFA | 1.9 W/m2iCFA |
| Primary energy demand: | 36.45 kBtu/yr•ft2iCFA | 115 kWh/yr•m2iCFA |
| Airtightness: | 0.4 ft3/min•ft2 | |
Envelope | ||
| Construction Type: | wood | |
| Floor Assembly: | Slab on grade - Cork or Marmoleum flooring. 4" heated concrete slab w/ 10" deep sand heat sink. 6 mil visqueen air barrier. 12" square bond beam foundation. Wrapped in 6" high density EPS insulation. | |
| Wall Assembly: | Wood framed - 1/2" GWB. 2x6 framed wall, dense packed with fiberglass insulation. 1/2" OSB coated with Henrys Blue Skin air and weather barrier. 6" EPS insulation. 3/4" rains screen. Hardi panel and shou-sugi-ban burnt cedar siding. | |
| Roof Assembly: | Standing seam metal roofing. 1/2" OSB sheathing. Manufactured trusses with 24" of blown cellulose insulation. 1/2" air sealed OSB. 1/2" GWB. | |
| Windows: | Zola Thermoplus Clad | |
| Entry Doors: | Zola Variotech and Codel SFF | |
Systems | ||
| Ventilation system: | Zehnder Novus 300 | |
| Heating/Cooling system: | Navien Combi on demand water heater w/ hydronic in-slab Radiant heat. Fujitsu ducted mini-split | |
| Domestic hot water system: | Navien Combi on demand water heater | |
| Other green building systems: | Solar ready design. | |
Team | ||
| Passive House Consultant: | Randy Foster - The Artisans Group | |
| Passive House Consultant Certification: | PHIUS | |
| Architect: | Tessa Smith - The Artisans Group | |
| Structural Engineer: | Carissa Farkas - CF Structural Engineering | |
| Contractor: | Randy Foster - The Artisans Group | |
Comments | ||
| Additional Information: | Clerestory windows give solar gain without harsh direct sunlight. Worked amazingly well. Self-supporting porch structures add steel detailing while minimizing thermal bridging. Built -in HRV ducting chases in dropped ceilings allowed for easy and non-intrusive installation. | |
| Project Website: | http://artisansgroup.com/portfolio/delphi-haus/ | |