RTH Mechanical Contractors Inc Projects

We proudly serve a variety of commercial industries.

We’ve had the opportunity to work on many different types of commercial and industrial projects throughout the years. Below you will find general information and pictures of projects we are currently bidding, projects that are in progress, and projects we have worked on in the past.

Current Projects


Portsmouth Naval Shipyard

  • P293 PBR Blast & Paint
  • Building 2, Reactor Srv Ship Support
  • Building 178, Waterfront Support Facility
  • Building 170 Dry Cooler
  • Building H-1 CNIC Base Support Consolidation
  • Repair UEM Water Distribution
  • Dry Dock 2 Portal Crane Rail and Tunnel Repairs
  • Building 174 Sewage Back-Up

Medical Centers

  • Dartmouth Hitchcock Medical Center, Patient Pavillion Connector
  • Dartmouth Hitchcock Medical Center, CT-5
  • VA Medical Center Emergent Dental HVAC Upgrades

BAE Systems, Nashua NH

  • BAE Canal St, Area 5, Phase 2
  • BAE FAB 1A1 Mechanical
  • BAE Temescale Cooling Water Project
  • BAE TPTP01 BL4 SIL Plant Rearrangement

Air Force Base/ Coast Guard Station

  • Pease AFB Building 253, Paint Booth
  • Boston ARTCC AHU & Computer Units Replacement, Nashua NH
  • USCG Repair Sewer Pipes Bldgs 1, 4 & 8, Boston MA
  • USCG RFC Homeporting Base, Boston MA

School Systems

  • Bedford School Fuel Source Upgrade, Bedford NH
  • Rework Boiler Breeching, MIS & BHS, Bedford Schools
  • Merrimack Schools HVAC Upgrades, NH


  • Hanover Inn, Hanover NH
  • Steam Distribution System Inspection, State of NH

Past Projects


Portsmouth Naval Shipyard

  • Building 174, Plumbing & HVAC Waterfront Support Facility
  • Building 92, Energy Improvements & Repairs
  • Building 55, Energy & Repairs
  • Building 163, Water Tower Pump House
  • Buildings 375 & 337 Energy Repairs
  • Medical Dental Clinic
  • Dry Dock 1 Refueling Complex II
  • Building 306 Transducer Tank Repairs
  • R-22
  • Building 79 DX Coil



  • Pease AFB, Renovate Building 252, Air National Guard
  • Omni Bretton Woods On Mountain Lodge, Bretton Woods NH
  • UNH Elliot Alumni Center, Durham NH
  • Dartmouth Hitchcock Ambulatory Surgical Center, Manchester NH
  • Steam Conversion, State House Annex, State Library- State of NH
  • Mast Way Elementary School, Lee NH
  • Cannon Mountain Sprinkler System Summit Building
  • USPS Heaters, Nashua Post Office, Nashua NH
  • Central NH VNA Hospice, Wolfeboro NH
  • Hanover Inn Replacement
  • Flume Visitor Center Renovations, Lincoln NH
  • Foundry Place Parking Garage, Portsmouth NH


Contact us today!

17 Production Drive
Dover NH 03820

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