Let us know if you have any electrical needs!

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Diagnostic Pricing

Residential Service

For any and all heating or cooling services.

Diagnostic 1-20 Miles From DMS

128.99

Diagnostic 20-40 Miles From DMS

154.99

Diagnostic 40-50 Miles From DMS

180.99

Diagnostic Over 50 Miles From DMS

153.99

Commercial Service

For anything commercial HVAC related

Diagnostic Hourly

175.00

Maintenance Packages

Residential

One Visit Per Year

Starting at: $153.99

We will check every aspect of your system, including: Refrigeration, electrical, filtration, duct system, performance.

Two Visits Per Year

Starting at $288.99

Everything from the One-Time, but specified to prepare you for the extreme cold/heat.

Custom

Please Call

We can create a custom service to perfectly fit your home.


Commercial

One Time Per Year

Please Call

Have us come over and take care of the basics. Includes in-depth reporting. We will recommend various cleanings

Two Times Per Year

Please Call

Taking care of the basics and preparing for either summer or winter.


Custom

Please Call

We can create a package to fit your specific needs.

Residential

new construction residential home with split system

New Construction

Both standard and mini split systems in custom homes are a lot of fun! You will get to work with our design team to create a system to ensure maximum comfort while pushing for optimal performance and efficiency. We go from Longview to Kelso to Toledo to Vancouver (sometimes even Portland).

Existing Residence

Does your house not have any conditioning? We can provide a plethora of ducted and ductless mini split systems. We will spend time with you and learn how you use the spaces in your house to design a system that will best meet your needs.

Replacement

We provide free estimates if you are interested in replacing your old furnace or heat pump.

HVAC systems do wear out. We pride ourselves in keeping old equipment running. But when the cost to repair exceeds what's reasonable, we can work with you to get new equipment with a new warranty.

Service/Diagnostics

We want to keep your system running! We put forth a lot of effort to stay up to speed with the latest diagnostics technology and having weekly tech training classes for our guys. From furnaces, heat pumps, air conditioners, ductless heat pumps, we have the best service in Longview, WA

Maintenance

Just like changing the oil in your car, maintaining your HVAC is paramount to getting the most comfort with the least wear and tear. Keeping your system running efficiently is the best way to keep energy costs down while staying comfortable.

Call in to find out about our maintenance packages.

Commercial

commercial construction site commercial HVAC

New Construction

We can everything from office spaces, shells, or specific designs for manufacturing. We work with American Standard for full ducted systems and Mitsubishi City Multi for room specific conditioning.

Existing Structure

We can do everything from a simple tenant improvement project to a full system redesign to a server room needing additional cooling and humidity control.

Indoor Air Quality

Breathe clean, fresh air with our indoor air quality services. We offer air duct cleaning, air purification systems, and humidification systems to keep your tenants healthy and comfortable.

Maintenance Plans

We offer in-depth diagnostics and reporting for our commercial maintenance packages.

We focus heavily on cleanliness of all aspects of the systems to maximize performance and minimize energy consumption.

Instead of reacting to failures, lets be proactive and plan your downtime.

Electrical

backup generator

Residential

We can take care of all of your electrical needs from a simple diagnostic as to why an outlet isn't working to a full remodel or panel replacement.

If you're building a house, we can streamline the process by taking care of both your HVAC and electrical needs for a seamless experience and a home design that will give you peace of mind.

Commercial

From needing a new circuit run, a diagnostic, a tenant improvement, or a new building, we can do it all. Our electrical department has a vast amount of knowledge and experience to pull from to meet whatever creative needs you may have.

Generators

It's not always the loss of power that can have a negative effect on your home appliances as well as your HVAC system. It can be the voltage sag when power is restored. It is a good idea to not only have surge protection, but to provide a solution where do you don't even notice that you lost main power.
Propane or natural gas can be utilized as well as pairing them with battery backups.

We can go as far as automating the switch over when you have a power outage.



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Additional Services

radiant in floor heat keeping woman comfortable

Radiant Floor

At Diversified Mechanical Solutions, our mission is to provide affordable and reliable HVAC services to our customers. We strive to exceed expectations by delivering quality workmanship and exceptional customer service.

Learn More
dirty duct that needs cleaned

Duct Cleaning

We offer a wide range of HVAC services including air conditioning and heating repair, installation, and maintenance. We also offer indoor air quality solutions to improve the comfort and health of your home or business.

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1119 11th Avenue, Longview, Washington 98632, United States

(360) 577-6604

Copyright © 2025 Diversified Mechanical Solutions - All Rights Reserved.

We Do Electrical

Check out our offerings for all of your electrical and generator needs!

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