Early Green: First in the Nation (circa 1979) Passive Solar Double Envelope Multifamily Development

A townhouse unit is now available for sale in Miles Gardens, a 6 unit condominium project that utilizes a unique “double” or “thermal” envelope type of construction. This is where an “envelope” of air circulates between an inner and outer wall, distributing warm or cool air, depending on the season, throughout the building. The drivers of this air circulation are the natural forces of solar energy, gravity, convection, equilibrium, heat radiation and transfer. No fans or other mechanical means are necessary to drive the system.

For more detailed and technical explanation of the “thermal envelope” concept, visit 5321 Miles Avenue website.

On the outside, the stucco-surfaced building looks fairly ordinary, except for the curious triangular outline. But step inside the front door (salvaged from a 1910 Craftsman style home) and you’ll find your self in a tropical jungle paradise.

Several species of fern, ficus and palm stretch as high as 20-30′ to bathe in the light from the southwest facing truss-supported skylights.

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