28 North Main Street Office Building
Randolph, VT
Professional Services Provided
- Civil Engineering & Site Planning
- Construction Services
- Electrical Engineering
- Mechanical Engineering
- Permitting
- Structural Engineering
- Survey
Description of Professional Services
DuBois & King was the team leader in facilitating private/public partnerships with Randolph Area Community Development Corporation (RACDC) to advance downtown economic development and establish an incubator facility at the current DuBois & King location for Vermont Technical College. Over a three year period led initiative to develop and implement management plan to obtain funding. Required extensive interaction and commitment to succeed with innovative public/private partnerships, working with state and federal agencies. Led engineering design for state-of-the-art downtown office building with energy conservation and efficiency measures. Provided full Construction administration and inspection services. Demolition was completed in 2003, and the new building construction incorporates sustainable design features, including:
- Custom Thermal Shell-Spray Applied Urethane Insulation
- Dual Enthalphy Economizers
- Lighting Power Density
- Occupancy Sensors and Daylighting Dimming System
- Energy Recovery
- Premium Efficiency Motors
- High-Efficiency Air Conditioning
- Highly Energy Efficient Window and Door Systems
System (Modeling) Description
DuBois & King performed the project total energy modeling work to date in collaboration with Efficiency Vermont. Design to budget management resulted in a bid price of only $93/sf. Below is a brief summary of the Energy Conservation Measures included in the project.
Lighting Power Density
The aggregate weighted power densities for the facility were designed to achieve a lighting power density 20% lower than ASHRAE 90.1.
Daylight Harvesting
The glazing system was designed to maximize transmission of daylight into the office and open floor plan spaces. The Light Louver system was designed to be installed in the window openings to double the depth of penetration of daylighting into the spaces and nearly double the area which could be treated with photo-sensor controlled dimming systems. Direct/indirect pendant mounted fixtures were designed to maximize the quality of provided light and minimize lighting power density. Location and arrangement of workstations was coordinated with daylighting penetration patterns to avoid glare problems at terminals.
Occupancy Sensors
The lighting system was designed with 33 wall mounted occupancy sensors that each controls more than 248 watts.
High Efficiency Air Conditioning and Heating
The rooftop air conditioning units were selected to exceed ASHRAE 90.1-1999 EER requirements.
Dual Enthalpy Economizers
Dual enthalpy economizer control systems were specified for each rooftop unit.
Total Heat Recovery Systems
One enthalpy wheel heat recovery unit was designed to service the rooftop units, providing recovery of sensible and latent heat.
Custom Thermal Shell
The metal wall system was specified for an exterior, spray applied polyurethane foam in place of fiberglass batts between studs. The windows were specified as triple glazed, operable fiberglass windows. The envelope is so efficient that the customary perimeter baseboard heating was deleted from the design, resulting in cost and energy savings.
Premium Efficiency Motors
Premium efficiency motors were specified for the evaporator fans in the rooftop units. Back to Top
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