Monday - Friday, 7am - 4pm Pacific

Calendar of Events:


  • May 27th  Memorial Day Holiday
  • July 4th Independence Day Holiday
  • September 2nd Labor day Holiday
  • November 28th, 29th Thanksgiving Holiday
  • December 25th Christmas Holiday


  • AHR Expo January 22-24

Case Study: “UC Davis, The Green at West Village Student Housing”

Case Study: Silver Oak Apartments

Case Study: Batik Apartments “Design for impact” – Published by Metropolis

Case Study: “Batik Apartments: A low-carbon central domestic hot water system.”

How Your Water Heater Can Be a Secret Weapon in the Climate Change Fight

Case Studies – Courtesy of HVAC Systems

LABBC Building Tech Showcase Fast-Pitch Presentation – Heat Pump Water Heater Technology Evaluation

Colmac WaterHeat and COVID-19

To Our Valued Customers: In the midst of the current situation with so many disruptions caused by COVID-19 on so many levels, I am writing to assure you that we are continuing to operate at full capacity with standard lead times. So far, we have been able to source the raw materials and parts needed […]

NSF/ANSI 61 Certification

Colmac Waterheat proudly certified to NSF/ANSI Standard 61 Colmac Waterheat is committed to delivering safe high-quality heat pumps for potable domestic hot water. For this reason, we have invested in NSF/ANSI Standard 61. This standard establishes stringent requirements for the chemical leaching properties of products that come in contact potable water. Forty-nine U.S. states have […]

WaterHeat Way Newsletter – January 2023

Click Here => WaterHeat Way February 2023

Made in the Northwest

Colmac Industries is a major manufacturer and employer in Stevens County, Washington and was featured on KXLY's Made in the Northwest! Check it out at: https://youtu.be/lK6SjePq4vU  

12 Years of Colmac WaterHeat

12 years ago, Colmac Industries shipped their first batch of heat pumps, 4 x HPA4-PBSC, to Admor HVAC in Hawaii. Since then Colmac has shipped over 2300 units around the world. During this time, Colmac Industries grew into the Colmac WaterHeat brand and strove to improve the product by adding the water source line, and […]