Commercial Projects



The Insiginia Towers are a pair of 41-story residential skyscrapers in the Denny Regrade neighborhood of Seattle, WA. The buildings are made up of 698 residential condominiums with retail shops at the pedestrian level. Both luxurious, contemporary buildings are equipped with Mitsubishi Water Source VRF keeping the almost 700 urban residences comfortable to all who visit the city block.



Inspired by the Quartz crystal, native to the Pacific Northwest, the One88 condos were designed with purpose and a striking design in mind. The unique design and need for an air cooled system presented a challenge in the development of the project - but was solved by running 150 feet of piping vertically from the lowest point of the structure.


Holmberg Mechanical

On the shores of Lake Washington, Hyatt Regency Lake Washington at Seattle's Southport houses 347 guestrooms that combine the Pacific Northwest beauty with a modern flair. Its location provides easy access to Sea-Tac International Airport, downtown Seattle & Bellevue, Mount Rainier and Gene Coulon Memorial Beach Park. The Southport campus provides over 712,000 square feet of waterfront office and retail space, 7 on-site buildings for residential housing and additional space for limitless possibilities for growth.


Holaday-Parks & PSF Mechanical

Starbucks Corporate is a 1.8 million square foot building in the SODO neighborhood of South Seattle. This was a 115,000 square foot remodel from retail to office space using a Mitsubishi City Multi Heat Recovery System with Air Source VRF, 112 Ducted Fan Coils (PEFY) and 2 PUMY Units in the server rooms.


Holmberg Mechanical

The Lake Washington School District's newest middle school opened its doors to 900 students in the Fall of 2019. Geothermal heat serves the three story, 134,000 square foot school; utilizing Mitsubishi Water Source VRF and 134,000 lbs of Columbia Manufacturing Special Fab Ductwork.