HSI Mechanical

Commercial Verified

227 Puuhale Rd, Honolulu, HI 96819, Honolulu, HI

4.2(5 reviews)

4.2(5 Google reviews)View on Google

RTUAHUChilled Water/ChillerSplit SystemCooling TowerHeat Pump

Request a Quote (808) 845-5432 Website

Commercial Capabilities

24/7 AvailabilityNo

Multi-Site CoverageAvailable

Quick Answers

What makes HSI Mechanical a strong choice for commercial HVAC in Honolulu, HI?

HSI Mechanical brings over 50 years of commercial HVAC and plumbing experience to Honolulu, tracing its roots to 1974 as a subsidiary of Pacific Marine & Supply Company, which was founded in 1944. The company holds specialty licenses in Air Conditioning (C-52), Sheet Metal (C-44), and Plumbing (C-37), and serves healthcare facilities, hotels, government buildings, schools, retail spaces, and office buildings across a 25-mile service radius.

Does HSI Mechanical provide indoor air quality services for commercial buildings?

HSI Mechanical services air handling units, chilled water systems, and rooftop units — the core mechanical systems that govern ventilation and indoor air quality in commercial buildings. As a member of ASHRAE and the U.S. Green Building Council, the company applies recognized industry standards to HVAC installation and maintenance that directly affect occupant air quality.

What commercial HVAC systems does HSI Mechanical service?

HSI Mechanical services rooftop units (RTUs), air handling units, chilled water and chiller systems, split systems, cooling towers, and heat pumps. These capabilities cover the full range of mechanical systems found in Honolulu's commercial and government facilities, from office buildings and retail spaces to large healthcare and hospitality properties.

About

HSI Mechanical is a licensed commercial HVAC and plumbing contractor based in Honolulu, HI, with a history stretching back to the 1944 founding of Pacific Marine & Supply Company and more than 50 years of operation as HSI Mechanical since 1974. The company was formed specifically in response to the 1970s energy crisis and quickly built a reputation as an early adopter of energy-saving building-automation systems — a focus that remains central to its work today. HSI Mechanical holds license ABC-24578 with specialty licenses in C-52 Air Conditioning, C-44 Sheet Metal, and C-37 Plumbing, and its workforce operates under union agreements with Plumbers and Fitters Local 675 and Sheet Metal Workers International Association Local 293, ensuring trained, safety-certified tradespeople on every project. Facility and property managers across Honolulu rely on HSI Mechanical for installation, service, and preventive maintenance agreements covering rooftop units, chilled water systems, air handling units, cooling towers, split systems, and heat pumps. The company's client base spans healthcare facilities, hotels, government buildings, educational institutions, retail spaces, and office buildings, including work at the commercial, federal, state, and city and county levels. HSI Mechanical is an active member of ASHRAE, SMACNA, the U.S. Green Building Council, the Hawaii Build Green Council, and more than a dozen additional professional and trade associations, giving its teams direct access to the latest standards in efficiency, safety, and mechanical system performance across Hawaii's demanding tropical climate.

Frequently Asked Questions

Does HSI Mechanical offer preventive maintenance agreements for commercial facilities?

Yes, HSI Mechanical offers preventive maintenance service agreements for commercial buildings in Honolulu. Regular maintenance contracts help facility managers keep rooftop units, chilled water systems, and other mechanical equipment running at peak efficiency and reduce the risk of costly unplanned downtime.

What building types does HSI Mechanical have experience servicing in Hawaii?

HSI Mechanical has experience serving healthcare facilities, hotels and hospitality properties, government buildings, educational institutions, retail spaces, and office buildings. The company's client base includes facilities at the commercial, federal, state, and city and county levels across Hawaii.

Is HSI Mechanical qualified to work on government and military facilities in Honolulu?

Yes, HSI Mechanical explicitly serves government and military customers and holds the appropriate contractor licenses for federal, state, and city and county work in Hawaii. The company participates in state DOE and DOT General Contractor Association committees, reflecting active engagement with public-sector procurement processes.

What professional associations is HSI Mechanical a member of?

HSI Mechanical holds memberships in ASHRAE, SMACNA, the U.S. Green Building Council, the Hawaii Build Green Council, the National Fire Protection Association, the Plumbing and Mechanical Contractors Association of Hawaii, and the Association of Efficiency Engineers, among others. These memberships keep the company aligned with current standards in energy efficiency, fire safety, and mechanical system design.

Does HSI Mechanical use digital technology to manage work in occupied commercial buildings?

HSI Mechanical employs digital technology to coordinate and deconflict its work on-site, with the stated goal of minimizing disruptions for building occupants and other contractors. This is particularly relevant for facility managers overseeing active healthcare, hospitality, or government facilities where downtime and interference must be tightly controlled.

Equipment & Systems

System Types Serviced

Rooftop Unit (RTU)Air Handling Unit (AHU)Chilled Water / ChillerSplit SystemCooling TowerHeat Pump

Building Types Served

Healthcare / Medical

Hospitality / Hotel

Government / Municipal

Education / Campus

Retail / Shopping Center

Office Building

Operating Hours

Monday	7:00 AM – 5:00 PM
TuesdayToday	7:00 AM – 5:00 PM
Wednesday	7:00 AM – 5:00 PM
Thursday	7:00 AM – 5:00 PM
Friday	7:00 AM – 5:00 PM
Saturday	7:00 AM – 6:00 PM
Sunday	7:00 AM – 5:00 PM

License & Insurance

Insurance VerifiedNot verified

Location

227 Puuhale Rd, Honolulu, HI 96819, USA

Request a Quote

Avg. response in 4 hours

Commercial Capabilities

24/7 AvailabilityNo

Service AgreementsPreventive Maintenance

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Google Reviews

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5 years ago

Totally horrible employees didnt even cath my name before judging me. Then called the cops on me. Good thing i never needed their service.ill never need it now.

— Jimney Kricket

a year ago

Great company and staff.

— Daniel Hollembaek

8 years ago

Get all your sheetmetal needs here!!!

— Keoks Manabe