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Custom Residence, AK
Award winner
Residential | Anacortes Washington | SIPs Classic Zero Energy
Washington
Project Type Residential | Single Family < 3000 sf
Year Completed 2016
Project Size 3291 sq ft
SIPS Used 6" EPS Walls & 10" EPS Roof
Sustainable Features Besides Premier SIPS, all paints and finishes were low VOC or zero VOC, except for the acid-stained concrete floor in the kitchen and utility areas. A more durable and impervious finish was desired there. The landscaping included a rain garden for infiltration of storm water, and over 2,000 gallons of additional rainwater catchment and storage for irrigation of other landscaped areas.
Environmental Certifications Net Zero/Zero Energy Ready
Awards 2017 BEA First Place Overall & Winner Single Family Over 3000 S/F
Architect Zero-Energy Plans LLC
Contractor Clifton View Homes (CVH)
Project Overview
CVH Anacortes Classic Zero Energy
Why SIPS?:
SIPS construction is one of the primary keys to the success of Clifton View Homes, especially when it comes to designing and building Zero-Energy Homes. They are sought after for their skill and experience in using Premier SIPS to achieve outstanding energy efficiency. This single-family home with a mother-in-law suite on the accessible main level is a prime example.
Benefits of SIPS:
SIPS are the key to tight, energy-efficient construction, without the thermal bridging, and on-site labor issues required by conventional stick-framed construction. SIPS also allow the entire roof to be installed and dried in within a single day of work. This allows sub-contractors to work inside the home much sooner, advancing the schedule by weeks.
Innovative Design Elements:
- Large open rooms on both floors with lots of large beams
- Tall ceilings and craftsman style allowed for beams to be exposed
- SIPs roof was engineered using I-joist splines to increase the spans, keeping the attic area open and usable as a hobby room
- Attic window provides a spectacular view of the town and yacht basin
Certifications:
- DOE Zero Energy Ready
- Energy Star
- EPA Indoor Air Plus
- SICBA Built Green 5-Star
HERS Index: -19
Blower Door Test: .82 ACH50
HVAC:
The main floor is heated with a Daikin Altherma air-to-water heat pump and in-floor radiant heat. The Daikin Altherma also provides domestic hot water, at about 450% efficiency. The second floor and attic are mostly passively heated with the warm air rising from the lower level, but a small Daikin ductless heat pump was installed with a head in the master suite and another in the 2nd-floor office in case cooling was ever needed in the summer. These two ductless heads can also provide auxiliary heating if it is ever required.
Energy-Saving Materials/Energy-Efficient Products or Design Features:
- Under-slab insulation is 4" of XPS foam (R-20)
- Approximately 8KW of solar panels were installed on the south-facing roof, with room for more when the owners purchase an electric car.
- Charging facilities were planned for in the electrical panel.
- Windows are Vinyltek triple-glazed, triple-low-e with U-values between U.17 and U. 21 depending on the opening size and configuration
- The Energy-Star appliance package included the dishwasher and a front-loading washing machine
- All lighting is LED, and ceiling fans are Energy-Star listed
Client Comments:
"This project is a great example of how a very traditional craftsman-style home can be constructed using the latest materials and methods, at the same time achieving futuristic energy efficiencies. The HERS rating of -19 is the lowest we have achieved to date."
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