Alaskan Brewery Completes Transition to CO2 Process Cooling 

Denali Brewing & Spirits has completed another phase of decarbonization efforts with the installation of PRO Refrigeration’s newest PROGreen R744 Chiller System 

Denali Chiller

Last week, the work of four teams culminated in Talkeetna, Alaska with the commissioning, site training, and startup of the first natural-refrigerant chiller system for Denali Brewing and Spirits. After a year of diligent research and engineering discussions, these final steps complete the group’s journey toward reducing Denali’s global warming impact.

“Having everyone, PRO, Denali, Arctic Refrigeration and FGN working together and communicating constantly was great. This truly was a team effort” said Damon Reed, Head of PRO’s R744 Product Group.

Denali’s CEO Sassan Mossanen, along with the brewery’s service contractor Duke Brandt, of Arctic Refrigeration, recently prepared for the new system by traveling to PRO Refrigeration’s production facility in Mocksville, NC in the final days of production. During the visit, Damon introduced them to transcritical and subcritical CO2 refrigeration and safety, and provided a tour of the anatomy of the PROGreen chiller system.

“Discussing the network connectivity requirements setup ahead of commissioning was invaluable; you want to be able to consistently monitor a new system ensuring it is performing properly. Making sure we planned proper onsite technical training for the Arctic Refrigeration technicians and Denali staff was also important to ensure the hand-off of the system was a success. Using the training during the factory visit we were able to plan for the on-site audiences accordingly” Damon recalled.



When asked, Duke Brandt from Arctic Refrigeration said “Being able to plan piping in the return and supply for the main process tie-ins, and pre-piping for the heat recovery unit ahead of the equipment actually arriving was great. Getting the opportunity to see the system at the factory allowed for this. “

Soon after, the chiller system was transported across the US to its new home. During the 18-day journey from NC to AK, the Arctic Refrigeration team completed the piping installation and most system integration. The PRO Team, which included Damon, Jim VanderGiessen, and John VanderGiessen, traveled to Alaska for the final steps with additional remote support out of South Africa from the team at Future Green Now

Duke discussed some of the challenges that were overcome for the project to be successful. “Making sure we had the right R744 containers and type of R744 in the area took some extra planning. We also were not sure about the electrical draw on the existing transformer. Communication between the electrical contractor, brewery personnel, mechanical contractor, and the OEM was great to monitor everything at startup and make sure there would not be any issues.”

The teams celebrated the close of this important chapter with a taste of the drink that started this project; newly created ready-to-drink cocktails, which can be found exclusively at Climate Pledge Arena, home of the NHL Seattle Kraken.


About Pro Refrigeration

Auburn, Wash.-based Pro Refrigeration, Inc., is the leading cooling technology and equipment company for craft beverages and dairy in the US. The company provides innovative solutions for delivering chilled fluid from –45° F to +45° F. In 2020, PRO created their PROGreen Solution Team focused on natural refrigerants and shifting away from PRO’s usage of chemical-based refrigerants. Visit for more information on their shift to natural refrigerants.

About South Creek Dairy

Chris Jongsma serves almost 4,000 animals on his Dairy Farm where he continues an extended family history of dairy farming that began 65 years ago. Located in Earlmart, California, this farm has been in the business of milk production since 2004.

About San Joaquin Valley Dairy Equipment

San Joaquin Valley Dairy Equipment has been providing wholesale machinery and equipment for dairy farms since 1992. They are based in Tulare, California with a secondary location in Bakersfield.

About Frog’s Leap Winery

Frog’s Leap is a family-owned winery dedicated to sustainable principles and committed to producing wines with balance, restraint and respect for terroir. Originally founded by the Williams Family in 1981 on a spot along Mill Creek known as the Frog Farm, today Frog’s Leap makes its home in Rutherford at the historic ‘Red Barn’. Winemakers hand-craft 60,000 cases annually comprised of Sauvignon Blanc, Chardonnay, Zinfandel, Merlot, and an estate-grown Cabernet Sauvignon. Visit to learn more.

Download the PDF