(360) 577-6604


High Quality Products

Diversified Mechanical Services offers high quality and affordable HVAC products to our customers in Kelso, Washington and the surrounding areas.

We sell and service brands like American Standard, Honeywell, Mitsubishi, Navien, Heat & Glo, and more! No matter what your heating and cooling needs might be, you can rest assured that our licensed technicians can take care of it.

external air conditioner unit

Our advanced heating and cooling products include:

  • Heat Pumps
  • Furnaces
  • Whole House Air Filtration Systems
  • Communicating Air Conditioners
  • Tankless Water Heaters
  • Ductless Heat Pumps
  • Gas Fireplaces
  • Humidifiers
  • Touch Screen Thermostats
  • And More!
water heater

What Sets Us Apart?

  • Our staff has one simple goal, from the moment you call or make an online appointment, we want to make you smile. We want to be your contractor of choice!
  • We offer the finest heating and cooling products in the industry. The performance, longevity, and efficiency of our products set the standard in the industry.
  • Many of our products are EPA Energy Star compliant. This means significant savings in both your energy bill and the number of fossil fuels that are emitted into our atmosphere.

Join our family of satisfied customers today!

American Standard
honey well
Heat & Glo
accu clean
Mitsubishi electric

As you can see, we are dedicated to becoming your one-stop shop for superior HVAC products at competitive prices. We know you are sure to be satisfied with our products and services. For more information, contact us or call 360-577-6604 to schedule a free estimate!

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