(360) 577-6604


Affordable Heating and Cooling

At Diversified Mechanical Services, we pride ourselves on the affordable heating and cooling services we provide in Kelso, Washington, and the surrounding areas. We offer affordable heating and cooling services and our number one goal is customer comfort and satisfaction.

setting the heating & cooling system

Certified Technicians

With over 34 years of sales and service experience, we didn’t get here by accident. We got here because we care. Our factory trained NATE certified technicians ensure that you get the best services in the industry and we are fully licensed, bonded, and insured.

We are your source for prompt, professional, economical and efficient solutions to all of your home and office comfort requirements.

Our heating and cooling services include:

  • Residential and Commercial Sales and Services
  • Heating and Air Conditioning Installation and Repair
  • Gas Piping
  • Air Ducting and Ventilation
  • Ducted and Ductless System Installation and Repair
  • Residential, Small Commercial, and Industrial System Installation
  • Manufactured Home Heating and Cooling System Installation
heat pipes
commercial system

Why Diversified Mechanical?

  • Courteous and Professional Staff
  • Factory Trained
  • Computerized Service Records at Our Fingertips
  • Prompt Response
  • NATE Certified Technician on Staff
  • Residential & Commercial

Diversified Mechanical Services wants to be your choice for heating and cooling services. We promise to work hard to make you happy. Our reputation is based on quality and excellent service. Contact us or call us directly at 360-577-6604 for more information or to schedule your no obligation estimate. Be sure to ask about our convenient financing options!

Proudly serving Cowlitz County, Washington including Longview, Kelso, Castle Rock, and Woodland, Clark County, Washington including Vancouver, Battle Ground, and Camas, and Columbia County, Oregon including Rainier and Clatskanie

Licensed, Bonded & Insured

Washington State Contractor
License # DIVERMS955J8

Oregon State Contractor
License # 181485

Payment Options

We Accept Visa, MasterCard, Cash and Checks

Call For Special Pricing on Air Filters

Hours of Operation

Mon - Sat:
8:00am to 6:00pm


Better Business BureauNorth American Technician Excellence
International Ground Source Heat Pump Association
National Association of Home Builders