Green Hammer - Design | Build | Energy in Portland, Oregon

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Green features

Air Source Heat Pump heats both hydronic floors, radiators and domestic hot water
Heat pump uses efficient R410-A refrigerant, eliminating HCFCs and CFCs that cause global warming
All-electric house means no fossil fuels
Six-kilowatt grid-tied PV solar system means close to net-zero annual energy consumption
Envelope insulated to 50% above code (R30 walls, R40+ ceilings)
High performance staggered-stud walls allow continual thermal barrier with minimal thermal bridging
Reflective metal roof with air gap to reduce summer heat gain
Continuously ventilating Heat Recovery Ventilator for clean fresh air.
High-efficiency lighting design uses Energy Star, fluorescent, LED and halogen task lighting for maximum performance-per-Watt
Energy Star fiberglass windows
Energy Star appliances
Induction cook top (high efficiency, precise adjustment, and no toxic combustion gases as with natural gas)

Potable rainwater system with 6000-gallon storage and advanced purification supplies close to 100% of all household water needs
26 gauge Taylor standing seam metal roof and gutters optimized for rainwater collection (1,500 gallons per inch of rain)
Dual-flush toilets and low-flow plumbing fixtures

Lumber used to frame structure and walnut butcher block countertops made from urban salvaged logs supplied and processed by Urban Timber Works (walnut log came from the site)
The upstairs floors, trim and kitchen cabinet boxes made from 100% local, Forest Stewardship Council (FSC) certified no added formaldehyde (NAF) wood. The cabinet faces were made from douglas fir staves salvaged from oregon maraschino cherry processing vats.
Earthen floors installed throughout kitchen and living area.
Non-chrome fixtures (stainless steel and nickel-plated) – to avoid toxic and carcinogenic chromium released during manufacture