Mechanical Engineering – Page 2 – DuBois & King, Inc.

New Hampshire Bureau of Public Works Statewide Mechanical Engineering Services

Three multi-year retainer contracts providing services to the Bureau of Public Works to address mechanical, electrical, and associated structural engineering issues for HVAC at State facilities. Select projects include:

Concord Prison Mechanical Modifications, Special Housing Unit, Concord. Designed reconfiguration of the HVAC ventilation system serving the Special Housing Unit (SHU) in the prison. Reconfigured ventilation system ductwork serving the inmate cells, making access to the plumbing system clean-outs easier. Replaced two gas-fired boilers with three new high efficiency condensing boilers.

Heating Plant Renovations at Peterson and Dube Buildings, Lakes Region Facility, Laconia. Design for replacement of two gas-fired boilers with three new high efficiency condensing boilers, utilizing existing mechanical rooms. Added new digital boiler controls and fully modulating boiler gas burners to optimize the energy efficiency of standalone heating plant in both buildings.

Health and Human Services Building Chiller Upgrades, Concord. Design for replacement of a central 200-ton chiller, a 25-ton chiller, replacement of a 200HP high pressure steam boiler, and improvements to two air handling units. Assessed energy recovery methods, control sequencing, and occupancy usage.

Data Center Upgrades, Traffic Management Center, Concord. Designed HVAC for a new computer room including back-up A/C and upgrades and power enhancements for the primary data center that serves the State’s Traffic Management Center and 9-1-1 facility. Sized system for expansion of server equipment (air conditioning, power, and emergency services). The new A/C system utilizes a glycol cooling loop through an exterior dry cooler to provide “free cooling.”

Glencliff Assisted Living Facility, Glencliff. Design and survey services for this off-grid facility, including an emergency generator for a wood chip plant and above ground and below ground diesel fuel storage tanks.

New Hampshire State House. Design of HVAC upgrades to the State House’s central kitchen and dining facility, including new air conditioning equipment, kitchen hood make-up air, and exhaust equipment. Replaced two packaged air conditioning units and upgraded the kitchen ventilation system.

Improvements to Traffic Buildings, New Hampshire Department of Transportation. MEP assessment at Traffic Building A. Designed gas-fired radiant tube heating upgrades to Traffic Garage Building B. Designed gas-fired heating upgrades to Traffic Garage Building C.

NH Veterans Home Equipment Upgrades, Tilton. Upgrades included a new patient wandering system, replacement of all water source heat pumps including temperature control upgrades, a new commercial kitchen, and expansion of an existing domestic solar hot water system.

Cooling Tower and Roof Replacement, Rockingham County Courthouse, Brentwood. Design and cost estimating for replacement of cooling towers and roofs on an existing courthouse.

Jay Peak Resort Sky Haus

D&K provided structural, mechanical, electrical, and plumbing design engineering services for renovation of the tram docking building at the top of Jay Peak (elevation 3,900 ft). This building, originally built in 1968, was redesigned to house a 120-seat cafeteria. Design services included a new ventilation system, new plumbing including a new potable water system with UV filtration, a new emergency generator, complete electrical upgrades, and structural modifications. Challenges included the reuse of the existing 14,000 and 10,000 gallon water reservoirs originally built into the mountain face, heating requirements for a mountain-top wind-blown facility, and electrical upgrades and emergency generator installation. D&K provided design engineering services for the following:

Mechanical, electrical, and plumbing design for 120-seat restaurant
New kitchen mechanical and plumbing services
Potable water system with UV filtration
Electrical upgrades
Structural reinforcement of existing water reservoirs
HVAC for highly exposed facility

Englesby House Renovations

DuBois & King provided mechanical, electrical, plumbing, and structural engineering, and bid and construction phase services for the interior renovation of the Englesby House, which serves as the University of Vermont’s President’s residence. The structure was built in 1914 and is listed on the National Register of Historic Places. D&K provided engineering services for the interior building elements for the main residence including electrical and mechanical upgrades, upgrade of the existing heating system, a new central air conditioning system, and centralized controls.

MEP upgrades were provided for the upgrade of the main level kitchen, installation of a second floor laundry room, renovations to two second floor bathrooms and master bed/bathroom suite, and refurbishment of the third floor. Electrical design included lighting upgrades and changes associated with HVAC upgrades. Structural scope of services included analysis and statement of condition of the existing roof.

Dealer.Com Office Building

Mechanical and plumbing engineering for a 36,000 sf renovation for a website development and management company. Scope included site survey of existing conditions, re-working of existing HVAC equipment for the new layout, and design for new HVAC and plumbing improvements. The existing chiller was re-used together with existing air handling equipment. New roof-mounted equipment, boilers, 4-pipe fan-coil units, and heat recovery units were designed. Design work included temperature control upgrades and acoustical treatment for overall system noise reduction.

Community College of Vermont Academic Addition

Mechanical, electrical, and plumbing engineering services for a new 2-story, 12,000-sf addition and improvements to existing spaces in the Community College of Vermont Academic Building. The new building houses nine classrooms plus additional support service offices.

Mechanical services included new high efficiency boilers with variable speed pumps, variable refrigerant flow heat pumps, general and specialty exhaust system requirements, and DDC temperature controls. The design of the new heating and air conditioning systems interconnected with those in the existing adjoining building. Plumbing services included improvements to the primary water service entrance and extension into the new building with new water conservation fixtures.

Electrical services included modifications to the primary power service entrance and re-feeding to the existing main panel in the existing building, new high efficiency lighting, controls, and expansion of the fire alarm system.

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