Maclay Architects renovated an historic Waitsfield village building into a net-zero office space. This deep energy retrofit included the addition of R-40+ wall, R-60+ roof insulation and R-5 windows. The building utilizes an air source heat pump for both heating and cooling. Heat recovery ventilation and ceiling fans further reduce total energy consumption. Extensive daylighting along with computer controlled, high efficiency Ergo lights reduce lighting loads. Finishes include zero-VOC paints, locally harvested wood flooring and trim, formaldehyde-free wheat board and medite particle. Outside a 19.55 kw grid inter-tied photovoltaic solar array provides 100% of the buildings annual power needs. Sitework included the stabilization of the Mad River stream bank and an easement for the Mad River Path.

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Carbon inventory and assessment report
Current photovoltaic output data
Bill Maclay's talk at the Net Zero Open House

Open ceiling trusses for improved daylighting

Wheat and palm tree flooring                                                          Recycled glass tile in stained conrete floor

Daylighting windows with light reflecting blinds above and roller screen shades below to reduce glare and allow view

A 17.55 kW photovoltaic array and carport, in addition to a 2 kW tracker provide 100% of the office's power. The PV installation was made possible by a grant from USDA Rural Development and Green Mountain Power.