First Net-Zero Multi-Family Building in Region to Open

Tracy Community Housing Under Construction

First Net-Zero Multi-Family Building in Region to Open
Green Energy Times, September 2019
by Chris Gillespie

How Twin Pines Set the New Gold Standard for Sustainable, Multi-Family Living


Tracy Architects Rendering
When it opens this fall, Tracy Community Housing will be a sleek, stylish and sustainable addition to West Lebanon’s residential area. Photos courtesy of Twin Pines Housing.

Affordable housing developer Twin Pines Housing Trust will make history this fall by opening the first net-zero, multi-family building in the Granite State. Located across the street from the Kilton Public Library in West Lebanon, New Hampshire, Tracy Community Housing will also be the first net-zero multi-family building of any significant size in all of northern New England, measuring at 29,000 square feet.

Similar to Wentworth Community Housing, which Twin Pines opened earlier this summer in nearby White River Junction, Vermont, Tracy Community Housing’s twenty-nine units are restricted to households earning up to 60% of the area median income. In Grafton County, where Tracy Community Housing is located, this equates to a single individual making roughly $37,000 a year or a family of four making no more than about $53,000 annually.

Twin Pines Executive Director Andrew Winter said that, in addition to providing an affordable housing option, Tracy Community Housing will help “reinforce the residential nature of Tracy Street and improve the overall quality of the housing stock in the neighborhood.”

Although Tracy Community Housing is not the first multi-family building on Tracy Street, its infrastructure and design are certainly one-of-a-kind. Designed by energy-efficient design leader Bill Maclay of Maclay Architects and project managed by Tim Estes of Estes & Gallup, Tracy Community Housing reaches net-zero through a combination of impeccable insulation and extensive solar paneling.


Twin Pines Tracy Community Solar Featured Image
Twin Pines was able to maximize the number of solar panels by challenging multifamily building design conventions.

Designed and installed by Norwich Solar, Tracy Community Housing’s solar array consists of 384 solar panels and will be able to generate 185 kW. In order to ensure maximum coverage, Norwich Solar installed solar panels on the roof of Tracy Community Housing as well as on top of the building’s south side façade. To complete the array, Norwich Solar built a freestanding solar arbor, which, Winter says, will provide residents with a shaded area to park bicycles or relax at a picnic table.

Rooftop Solar1 768x576 1The yield of this solar array will cover the base electrical needs of the building, including heating and cooling, thanks to a series of Mitsubishi air source heat pumps. Similar to Wentworth Community Housing, Tracy Community Housing also utilizes an energy recovery ventilation (ERV) system, which will use the heat of the air exiting the HVAC system to precondition the air entering the HVAC system.

In terms of insulation, Tracy Community Housing uses triple-glazed windows and air-sealing to remain energy tight. Twin Pines worked with the experts at SIGA to ensure that Tracy Community Housing has as strong of a building envelope as possible.

For more information on Tracy Community Housing and Twin Pines Housing, visit

To read G.E.T.’s previous coverage of Wentworth Community Housing, visit Wentworth Community Housing.

Chris Gillespie is a contributing writer for Green Energy Times. He can be reached at