Zero Energy Hillside House Oak Harbor WA

Location: Oak Harbor, WA

Project Information

Project Type:	Residential, < 3,000 sq. ft.
Manufacturer:	Premier Building Systems
Builder:	Clifton View Homes
Design Professional:	Clifton View Homes
Year Built:	2022

Performance

High Performance:	Yes
HERS/EUI Index Score:	-18
ACH50 - Blower Test Results:	0.72
kBtu/sq.ft./year:
CO2 lbs./sq.ft./year:

Awards/Certifications: Building Excellence Awards, DOE Zero Energy Ready Home, ENERGY STAR Certified, EPA Indoor AirPLUS, Passive House

BEA: BEA 2022 Winner High Performance Homes Under 3,000 sq.ft. and Best Overall Residential and Total Best in Show

"I did not know I could have all this, until my builder told me about it. My wants were simple; I wanted a home that would be more comfortable than my old one, all on one level, and use less energy … everything just came together, one idea after another."
– Homeowners

PROJECT DATA:

Layout: 3 bdrm, 2 bath, 1 fl, 2,224 ft2
Climate: IECC 4C
Completed: March 2022
Category: Custom for Buyer

MODELED PERFORMANCE DATA:

HERS Index: without PV 39; with PV -18
Annual Energy Costs: without PV $850; with PV $-250
Annual Energy Cost Savings: (vs typical new homes) without PV $1,450; with PV $2,550
Annual Energy Savings: without PV 13,650 kWh; with PV 24,150 kWh
Savings in the First 30 Years: without PV $59,200; with PV $103,200

KEY FEATURES:

Walls: SIP walls, R-28 total: 6.5" graphite EPS, draining house wrap, cedar shingle siding.
Roof: SIP shed roof, 10-1/4" R-46 graphite EPS SIPs, synthetic underlayment, steel roofing.
Attic: Unvented vaulted ceilings, R-46 SIPs; small utility attic for exhaust fans.
Foundation: Unheated basement, R-23 ICF walls, 4" R-20 XPS under basement slab. Floor joist cavities are filled with R-38 fiberglass batts and topped with 1-1/8" t&g floorply, house wrap slip sheet, and 3" concrete slab with in-floor radiant heat loops.
Windows: Triple-pane, argon-filled, low-e3, vinyl frame, U=0.17, SHGC=0.34.
Air Sealing: 0.72 ACH50. SIP envelope, all joints sealed with caulk and tape.
Ventilation: Range fan timered with 45-CFM fan on fresh air intake through MERV 19 filter.
HVAC: Ground-source heat pump (3.0 COP) supplies hot water for radiant in-floor heat. Passive solar heating of floor slab through large south-facing windows with deep overhangs. Timered fans for night ventilation cooling in summer.
Hot Water: Ground-source heat pump heats 50-gallon tank, COP 3.0.
Lighting: 100% LED, daylight sensors, windows set for optimal light, heat, venting.
Appliances: ENERGY STAR refrigerator, dishwasher, ventilation fans.
Solar: 9.92 kW of solar panels and 27 kW battery storage installed.
Water Conservation: EPA WaterSense-certified low-flow fixtures, compact plumbing. Rainwater collection with five 5,000-gallon tanks in basement for domestic and irrigation water.
Energy Management System: PV system tracks production, use, and time-of-use rates.
Other: 100% ZERO VOC products. Two electric car chargers.

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