Dorvin D. Leis Co., Inc.
Dorvin D. Leis Co., Inc.

Hawaii's Premier Mechanical Contractor Since 1967

Our Services


With Hawaii’s tropical climate, DDL seeks to provide thermal comfort, acceptable indoor air quality, and reasonable installation, operation, and maintenance costs for all HVAC systems. DDL provides mechanical services for both small and large projects and has worked in a variety of settings including residential high rises, townhouses, hospitals, hotels, schools, office buildings, laboratories and many others. In each case, work and services were customized to the needs of the customer. We are able to work on a wide range of projects from large fast paced multi-million dollar projects to simple repairs. Renovations, new construction, upgrades, emergency repairs, we do it all.

DDL Offers:

  • Chillers
  • Commissioning
  • Complete Management, Coordination and Installation Of All Process And Utility Piping Systems, Equipment And Subcontracts
  • Controls
  • Dehumidification
  • Detailing, Fabrication and Assembly Of Process Piping Systems and Components
  • Documentation and Labor Support For Start Up, Commissioning and Validation
  • Electrical Service and Installation
  • Flashing and Gutter
  • Fan Coil Systems
  • Multi Zone Systems
  • Roof Top Units
  • Sheet Metal Fabrication
  • Split/Duct Systems
  • Start Up & Testing
  • Testing and Balancing
  • Water Heaters
  • Warranties
Our Services
Our Services

DDC Control Division

DDC Control Division

DDC Controls Division has years of experience installation of the electrical distributed control systems that are used to control and monitor a building’s heating, cooling, and ventilation (HVAC) system. Modern building automation systems also control indoor and outdoor lighting, security, fire alarm, and other related low voltage systems that are part of an integrated Building Management System. Our DDC Controls Division Group consists of a large group of highly skilled and trained Union electricians, as well as low voltage technicians. When it comes to installing your equipment, you won’t find a more qualified group.

Field installations

As a control systems integrator, we offer complete automation installation and wiring solutions. Our installation and wiring experience spans many different industrial environments and industries. We use the latest methods and standards for all of our automation installations. Our value and strength comes from the ability to complete projects on time and within budget.

From simple installations of small control terminal boxes to complex sortation systems that span across an entire facilities, we can handle your project requirements.

Our services include:

  • Air handlers / roof top units / wiring
  • Boiler / chiller controls
  • Sensor placement / installation / wiring per designs
  • Start up/commissioning assistance
  • DDC systems - new or renovation / upgrades
  • Surgery monitoring controls / Medical gas alarms
  • Fume hood controls
  • Upgrading existing BAS systems

Segment of Markets:

  • K-12
  • Office Buildings / Commercial
  • Health Care Facilities
  • College / Universities
  • Performance Contracts
  • Complete Conversions / Renovation
  • Research Laboratories
  • Industrial / Production
  • Water and Wastewater Plants
  • Water Parks
  • Hotels

  • Alerton
  • Automated Logic Corporation
  • Carrier
  • Delta Controls
  • Facility Explorer
  • Honeywell
  • Johnson Controls
  • Phoenix Controls
  • Schneider Electric
  • Trane