Solar Village Prospect
The Solar Village
Prospect condominiums in Longmont are very energy efficient and
purchase all of their electricity from the City of Longmont’s
wind power program.
Credit: Solar Village LLC
Multifamily Buildings Category
Solar Village LLC opened a housing development in Longmont in April
2006 that the company hopes will develop into a model that can be
repeated across the country. The project developers included solar
energy systems into the building design in a way that enhanced the
architecture instead of detracting from it.
This project involved building 16 condominiums,
which range in size from studio to two bedrooms. The total size of
the construction project involved 28,761 square feet of floor area.
Compared with a residential building of similar size built to the
standard of local energy codes, the design team estimates these
condominiums will annually save (based on modeling using DOE-2
- 67,400 kilowatt-hours (kWh) per year of
- 3,055 therms of natural gas
- 71 metric tons of carbon dioxide.
Use of Renewable Energy
The Solar Village Condominiums use the
following strategies to take advantage of renewable energy:
- Solar power from a PV array rated at 3.5
kilowatts (kW. The array is connected to a common electrical
panel that connects to all 16 condo units. The owners will
pay electricity bills through the homeowners association.
- Solar hot water system that provides heat
for domestic hot water and to radiant heating pipes laid
into the floors. The system consists of 21 panels that feed
hot water into a 1,500 gallon storage tank. This tank, in
turn, preheats water for all heating loads, including both
hot water and space heating. The building designers estimate
the system will meet 100 percent of the requirements for
domestic hot water and will substantially reduce heating
bills in the winter.
- Passive solar design that takes advantage
of south-facing windows that allow the winter sun to enter
and are shaded in the summertime. The floors underneath the
windows are made of gypcrete, a material made from mixing
concrete and gypsum, which provides thermal mass for keeping
inside temperatures comfortably steady in winter and summer.
- Green power from the City of Longmont’s
green pricing program provides 100 percent of the
electricity delivered through the grid from wind energy. The
purchase is handled through a yearly contract with the city
and is included in the homeowner’s association documents.
This purchase cannot be changed except by a unanimous vote
of the residents.
CRES 2006 Vice
President Doug Seiter awards a member of the
project team the 2006 Colorado Renewable Energy
in Buildings Award.
The following organizations share the
2006 Colorado Renewable Energy in Buildings Award in the
multifamily buildings category:
- Solar Village, LLC in Boulder;
- Michael Tavel Architects; architect.
- PCD Engineering Services in Longmont;
- DMW Realty and Development Company in
Boulder; general contractor.
- Ecoenergy; energy modeling on the