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BigHorn Home Improvement Center
Completed in 2000, the 43,000 square foot
BigHorn Home Improvement Center
in the mountains of Colorado was
designed to be 60% more efficient than an identical building built to the ASHRAE
Standard 90.1-89. Day lighting via skylights accounted
A variety of technologies monitor and control occupant comfort. Windows on the roof and at lower levels are computer-controlled to allow warm air to escape and to allow cool air in, respectively. A transpired solar collector on the south side of the building heats ventilation air that is drawn into the building with fans. The building also features a radiant heat floor system and window overhangs that provide shade in the summer. The building has no air conditioning units. The building also features an energy efficient envelope with double-layered Styrofoam walls and R-34 insulation in the roof. A 9kW integrated photovoltaic system can provide up to 25% of the building's total electric demand, with excess electricity sold to the utility. While the energy efficient design resulted in a 10% increase in design and construction costs, the utility bill savings will pay back the extra first cost in five years. For more detailed information, see the NREL report on BigHorn Home Improvement Center. |
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© 2002-
Southwest Energy Efficiency Project, 2334 North Broadway, Suite A ,
Boulder, CO 80304 phone: 303.447.0078 fax: 303.447.0158 email: info@swenergy.org |
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for
a 79% reduction in total lighting energy use. The building is further equipped
with compact fluorescent lights and motion sensors.