HSI Mechanical is an HVAC and plumbing contractor based in Honolulu, HI, serving commercial and government clients. With over 50 years of experience since its founding in 1974 as a subsidiary of Pacific Marine & Supply Company, HSI Mechanical specializes in energy-efficient mechanical systems, including HVAC installation, AC repair, and tune-up services. The company has worked with major industries such as healthcare, hospitality, retail, education, and military facilities across Hawaii. HSI Mechanical is known for its expertise in energy-saving building automation and maintains a strong commitment to safety and local community involvement.

Honolulu Appliance Repair Pro is a family-owned appliance and HVAC repair company serving Honolulu, HI. They specialize in repairing and installing air conditioning systems, including ductless split, central, and window units, working with major brands like Mitsubishi, Fujitsu, Carrier, and Daikin. Their technicians have at least 10 years of experience and stay updated with the latest technology to handle complex repairs and installations. The company also offers AC maintenance plans to help customers maintain their systems efficiently.

Alltemp is an HVAC and refrigeration service provider based in Honolulu, HI, serving both residential and commercial clients across Oahu and Maui. Since 1997, the company has offered a range of services including air conditioning and heating installation, repair, and maintenance, as well as commercial refrigeration and indoor air quality solutions. Alltemp specializes in heat pump repairs and advanced air purification and humidity control systems to support healthy indoor environments. The company also provides 24/7 emergency repair services for air conditioning and commercial refrigeration systems, ensuring timely assistance when urgent issues arise.