About Evergreen

Evergreen has been at the cutting edge
of the HVAC industry for four decades.

Evergreen designs and builds commercial HVAC projects.

From the smallest Tenant Improvement to the largest warehouse or office, we can handle virtually any commercial HVAC project, including new construction and retrofit. Our experienced team of engineers, managers, office staff and installers can design and build the perfect HVAC system that fits your unique building specifications and budget. We can meet the highest efficiency standards, including LEED certified projects. We have over 4 decades of experience staying at the forefront of the latest technologies, codes, and government and utility incentives.

Building value on every project

Building state of the art HVAC systems that won’t break your budget

Evergreen Refrigeration LLC, based in Seattle, is a commercial HVAC contractor, providing heating, ventilation, and air conditioning design, installation, and service for Western Washington’s commercial buildings. 

We have our own Professional Engineer who oversees a qualified team of Mechanical Engineers. We also have our own sheet metal fabrication shop located at our headquarters in Seattle, and a dedicated team of gas pipers. This vertical integration allows us to complete any HVAC project from start to finish, including engineering/design, fabrication, installation, control systems design and installation, and system commissioning. We provide high value at an affordable price throughout the system design and installation process, allowing us to install modern, state of the art systems at a competitive price.


  • Trane Comfort Specialist
  • Mitsubishi Diamond Dealer
  • Lennox Commercial Alliance Contractor
  • Daikin 3D Dealer
  • Refrigeration License #177375
  • Electrical License #EVERGRL882JB
  • LEED Certified Buildings
  • Mechanical Engineers on Staff
  • Metal Fabrication Shop on Location
  • Certified Crane Operators
  • Certified Lift Operators
  • Puget Sound Energy Contractor Alliance Network
  • NW Ductless Master Installer

Since 1975

The story of Evergreen starts with a man named Dick Lord. Dick had his own refrigeration company in the 1960’s. His two young and ambitious grandsons, Dave and Roger Patton, joined him there as apprentices.


In 1970, Roger and Dave decided to start their own businesses. One had a residential HVAC shop while the other specialized in commercial refrigeration. Then, in 1975, the brothers combined their businesses and Evergreen Refrigeration was born. Throughout the decades, Evergreen has been known as a company built on innovation, customer service, merit principles, and family values.


Rodger continues to play a role in Evergreen's management and business operations. Dave passed away in 2011 after a battle with cancer leaving an indelible impact on the company’s core principles and culture. This impact has become a large part of Evergreen's core values as his children continue his vision through the coming generations. Matt Patton, Dave's eldest son, is currently the company's General Manager, overseeing the entire operation. Adam Patton, Dave's second son, is the Commercial Construction Manager, overseeing field operations for the company. Doug Patton, Dave's third son, is the Sales and Engineering manager, overseeing system sales, engineering and design. With three generations of knowledge passed to the current management team, Evergreen has continued with both eyes on the future to ensure that the company flourishes as a leader in the Design Buil HVAC industry in the Seattle and Puget Sound areas.


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toll free   |   24/7 206-763-1744
727 S. Kenyon St.
Seattle, WA 98108
License #: EVERGRL954R2
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