Farmstead Passive House in Vermont for the Modern New England Family

Farmstead Passive House in Vermont for the Modern New England Family (1)

Farmstead is a Certified Passive House designed by Boston-based ZeroEnergy Design.

DESIGN CHALLENGE. A blend of features were carefully balanced to develop a final design that has an efficient footprint, meets the Passive House Standard (PHIUS+ Certified), and takes the form of a traditional farmhouse with some modern twists both inside and out. Durability was also a top client priority – this influenced a lot of the exterior design and detailing.

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SITE AND SURROUNDINGS. This 200 year old, 100-acre farmstead is predominately held under conservation restriction by the Upper Valley Land Trust. While the home sits in a field, it was sited behind a rise in the terrain that plays host to several fruit trees.

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CLIENT REQUIREMENTS. The exterior form complements the nature of the Colonial era site and the town history, with gabled roof lines. The exterior detailing – the siding, trim and steel decks – give the traditional form a modern twist. A progressive, contemporary look completes the interior, offering a clean, fresh modern feel.

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The client requested a structure on the south side of the house that would permit vegetation to grow and could double as summertime shading. In the walk-out basement, a freezer door provides access to a root cellar for energy-free food storage.

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PERFORMANCE. The air-tight, super insulated house is certified under the Passive House (PHIUS+ Certified), and Energy Star programs. It features R-60 above-grade walls, R-87 roof, R-36 basement walls, an R-75 basement slab, and air leakage of only 0.49ACH50Pa. The highly-insulative, triple-paned windows also play a role in passive heating due to their high solar heat gain coefficients. The active heating is provided by a wood burning stove, and electric radiant floors in the bathrooms. A solar hot water system provides domestic hot water. The home consumes an average of 275kWh of electricity each month which means that !3.5kW solar electric system would make the house net zero electricity.

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CONSTRUCTION. After building the super insulated foundation on site, the home’s walls were constructed inside a factory where it was protected from the elements and yielded very low levels of construction waste. The prefabricated structure was then trucked to the site, lifted by crane, and quickly assembled weather tight, which minimized the interior’s exposure to the elements and mitigated the risk of water damage and mold growth.

Architects: ZeroEnergy Design
Collaborators: Schematic Design, Mechanical Design, Passive House Consulting
Project: Farmstead Passive House
Location: Vermont, New England, USA
Photographs: Eric Roth

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Farmstead Passive House in Vermont for the Modern New England Family (12)

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