Business Details
50+ Years
experience
Your Trusted HVAC Partner in Orange, CA
Founded in 1967 by Aldokter, Don Miller, and Bill Gebbie, DMG Corporation has evolved from a regional HVAC equipment representative into a leading sales organization with over 100 team members. Our focus remains on delivering personalized engineering support and project management while representing top-tier HVAC manufacturers. With headquarters in Orange, California, and offices across Southern California and Hawaii, we serve consulting engineers, contractors, and facility owners through comprehensive solutions including custom air handlers, VRF systems, and cooling towers.Our technical staff provides design assistance, commissioning, and 24/7 parts support through DMG Parts, ensuring operational continuity for clients. We maintain a 67,000 sq. ft. facility stocked with critical components like VFDs and WSHPs, and our licensed DMG-SC division offers controls design and maintenance services. With decades of industry experience and partnerships with premier manufacturers, we prioritize client satisfaction through tailored solutions and technical expertise.
Services
HVAC Equipment Sales
Custom Air Handlers
VRF Systems
Parts Supply
Controls Design
Details
- Year established: 1967
Highlights and features
- We offer 55+ years of specialized HVAC industry experience since 1967
- Our team provides personalized engineering support for custom solutions
- We maintain strategic partnerships with leading HVAC equipment manufacturers
- Our Orange, CA warehouse ensures 24/7 availability of critical replacement parts
- We employ licensed technicians for comprehensive controls design and maintenance
Services
HVAC Equipment Sales
We provide custom-engineered HVAC solutions including air handlers, chillers, and cooling towers. Our team collaborates with engineers and contractors to select optimal equipment for commercial projects. With manufacturer partnerships, we deliver energy-efficient systems meeting ASHRAE standards while ensuring code compliance and operational efficiency.
VRF Systems
Our VRF solutions optimize energy use in multi-zone buildings through advanced refrigerant management. Technical staff assists with system design, load calculations, and integration with existing HVAC infrastructure. We supply components from leading manufacturers while ensuring proper sizing and performance specifications for commercial applications.
Parts Supply
DMG Parts maintains critical HVAC components including VFDs, WSHPs, and cooling tower OEM parts. Our Orange warehouse offers same-day pickup and delivery options for emergency repairs. We stock compressors, filters, and controls from brands like Yaskawa and LG to minimize equipment downtime for commercial clients.
Controls Design
Our licensed DMG-SC division specializes in HVAC control systems integration. Services include sequence of operations development, DDC programming, and BAS retrofits. We work with major controls manufacturers to optimize system performance, energy efficiency, and occupant comfort in commercial buildings.
Commissioning Services
We provide factory-assisted commissioning for new HVAC installations and retrofits. Our technicians verify system performance against design specifications through functional testing and calibration. This includes verifying control sequences, safety protocols, and energy efficiency metrics to ensure optimal operation prior to client handover.
People
Steve Weston
President
As DMG's current president, Steve Weston leads strategic growth initiatives while maintaining the company's founding commitment to technical excellence and client service in HVAC solutions.
Bill Gebbie
Founding President
Bill Gebbie co-founded DMG in 1967 and established the company's reputation for quality HVAC representation through his engineering expertise and client-focused approach.
Questions
What HVAC equipment does DMG Corporation represent?
We represent custom air handlers, VRF systems, chillers, cooling towers, boilers, and related mechanical equipment from leading manufacturers.
Which geographic areas do you serve?
We serve Southern California (Los Angeles, San Diego, Central Coast, Central Valley) and Hawaii from our Orange, CA headquarters.
Is replacement parts availability guaranteed?
Our Orange warehouse maintains 24/7 stock of critical components including VFDs, WSHPs, and VRV equipment for immediate pickup or delivery.
Do you offer technical support services?
Yes, our licensed DMG-SC division provides controls design, commissioning, maintenance, and factory-assisted startup services for HVAC systems.
