Home Blog Services Careers Contact us Welcome to our website! View our blog Our services New Construction & Renovation Major HVAC System Replacement Design Build Energy Savings Retrofit Oahu Plumbing & Sheet Metal, Ltd Oahu Plumbing and Sheet Metal (OPSM) has been one of the leading mechanical contractors in Hawaii for over 65 years. The company has completed a wide variety of projects of all types and sizes and is especially successful in complex projects that require high technical skills and quality installation. We are capable of handling small to multi-million dollar large scale projects. Our construction experience includes working on high-rise buildings, City/ County/ State/ Federal government facilities, hotels and resorts, wastewater treatment facilities, residential condominiums, hospitals, schools, airports, and more. Our services include plumbing, air conditioning, fire protection, custom sheet metal fabrication & installation, architectural flashing, louvers, metal roofing, metal sidings, and industrial piping fabrication & installation. Featured projects OACS and OPSM are full-service mechanical companies specializing in all types of commercial heating, ventilation, air conditioning, plumbing, and sheet metal services. Here are a few of the projects we have worked on: National Tropical Botanical Gardens Research Center Honolulu International Airport Holaniku MicroCSP Solar Thermal Plant Quick links Oahu Air Conditioning Service Oahu Plumbing & Sheet Metal Sen Plex in the Community Career Opportunities Our Locations Blog Popular posts A/C 101 Proper Sizing Save money! Go green! Oahu Air Condtioning Service, Inc Oahu Plumbing & Sheet Metal, Ltd Oahu Air Conditioning Company 1337 Mookaula Street Honolulu, HI 96817 Main: (808)848-0111 OACS: (808)848-0156 Fax: (808)848-0259 Copyright © 2012 Sen Plex Corporation