Projects: Hospitality

Outrigger Waikiki Beachwalk


Waikiki, Hawaii

InSynergy Engineering, Inc. provided the overall mechanical shell design services for the Outrigger Waikiki Beachwalk project, which consists of a two tower 400 room Embassy Suites hotel, a 200 room Outrigger Islander Hotel, a 1,200 room Outrigger Reef on the Beach, and a new 90,000 sf retail podium.

Our scope of services included the design and construction management of a new 2,400 ton chilled water plant that supports the entire complex. We also completed the shell design for the retail plaza which includes 40 retailers and restaurants, and the complete air conditioning, ventilation, plumbing, and fire sprinkler design for the main kitchen, pool and meeting rooms, parking garage, and over 30,000 sf of Outrigger office space. We also completed the mechanical design for the renovation of the 400 room Embassy Suites Hotel. The total construction cost for the project is approximately $650 million.

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Waikiki Marriott Hotel Renovation

Honolulu, Hawaii

InSynergy Engineering, Inc. completed the mechanical and fire protection engineering design for the complete renovation of the 600 room Kuhio Tower and the common area spaces including the lobby, guestroom floors, restaurants, fitness center, business center, retail spaces, ballrooms, executive center, water features, and pool deck.

Design included plumbing, air conditioning, ventilation, fire protection systems, and a new pool heating system.

Approximately 5% of the guest rooms and all of the public restrooms were also modified to conform to ADA handicap accessibility standards.  The renovation of the hotel also required upgrades to bring the hotel in compliance with current codes including installation of backflow preventers, and modifications to the storm drainage and sanitary sewer systems to conform to current storm drainage and wastewater requirements.

Currently, the hotel is undergoing a second phase renovation of the guest rooms and guest floor corridors in the Kalakaua Tower.  The scope of our design duties include the design of the plumbing, air conditioning, ventilation, and fire sprinkler upgrades to support the renovation of the guestrooms, including adding a second bathroom in some of the suites.  Future renovation work will also include the renovation of the public spaces in the Kalakaua Tower.

The total cost for construction for Phase 1 was $50,000,000.

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Halekulani Hotel Renovation, Phase I


Honolulu, Hawaii

InSynergy Engineering, Inc. is currently providing the mechanical and electrical engineering design work for the renovation of the Halekulani Hotel.  Our scope of work includes the following:

  • Provide mechanical and electrical design for the upgrades as described in the renovation program.
  • Provide mechanical and electrical demolition plans for the existing systems to be removed and upgraded.
  • Attend weekly design coordination meetings during the design phase with the Architect and design team to coordinate design elements.
  • Coordinate work with the Contractor and other disciplines including the kitchen consultant, structural engineer, civil engineer, interior designer, and architect.
  • Coordinate all telecomm work with Halekulani’s IT personnel.
  • Assist in securing building permits for the work.
  • Provide assistance during the bid phase including providing design clarifications, attending the pre-bid walk through, and assist the contractor in pricing of the required design work.
  • Provide QC Services during construction including reviewing all shop drawings, material submittals, and equipment submittals, conducting periodic site inspections, and attend OAC meetings as required during construction to provide clarifications during construction.
  • Conduct final acceptance testing and review of the installed work.
  • Review close out documentation including all operation and maintenance manuals and as-built record drawings.

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