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HVAC controls and building automation

Good equipment with bad controls wastes energy and money. We install, upgrade and troubleshoot controls so your system does what it’s supposed to.

50+ yearscombined HVAC-R experience
Marysville to Roycrews live where they work
Service + installone company, both teams
Commercial & residentialabout 80/20

What we do

  • New building automation systems for new construction and retrofits
  • Replacing aging or unsupported controls
  • Troubleshooting schedules, setpoints, sensors and sequences
  • Thermostat and zoning upgrades for smaller buildings
  • Getting trend data and energy data out of your system for compliance reporting

The short version

What are HVAC controls?

Controls tell your equipment when to run, how hard, and to what setpoint: thermostats, unit controllers, building automation systems, sensors, actuators and variable frequency drives (VFDs).

Why it matters

  • Bad schedules and broken sensors are some of the most common causes of wasted energy
  • Working controls keep comfort steady and equipment from short cycling
  • Trend data supports Clean Buildings energy management plans
  • Old, unsupported controls become a single point of failure

Who it’s for

  • Owners with an aging or unsupported BAS
  • Buildings with comfort complaints nobody can fix
  • Restaurants with walk-in and kitchen exhaust controls
  • Small buildings that need smart thermostats and scheduling

What we can do for you

  • Plant and building controls replacements
  • Thermostat, zoning and scheduling upgrades
  • VFD troubleshooting and replacement
  • Valve actuators, sensors and sequences
  • Walk-in and refrigeration controllers
  • Smoke control and fan interlocks
  • Air balancing and damper setup alongside controls work

Work we’ve done

  • Replacing a plant controls system on a Seattle waterfront building
  • Mechanical work for a smoke control upgrade in Bellevue
  • Fixed a dehumidifier that was reading mixed air by relocating its sensor
  • Diagnosed a VFD fault on a restaurant extractor fan
  • Replaced locked-out and failed thermostats in offices and shops

Real Omni jobs. We don’t name customers.

What we see most

Equipment running 24/7

Schedules lost after a power outage or never set. One of the cheapest fixes in a building.

Hot and cold complaints

Bad sensors, stuck dampers and valves, or sequences fighting each other.

Unsupported old controls

Panels nobody can program and parts that aren’t made anymore. We’ll lay out a replacement path.

Plant controls

Boiler and hydronic plant controls replaced and sequenced so the plant runs efficiently.

Data for compliance

Getting trend and energy data out of your system for Clean Buildings and BEPS reporting.

Smart thermostats

For smaller buildings, programmable thermostats and zoning go a long way.

Controls and compliance

Washington’s Clean Buildings law and Seattle’s BEPS both reward buildings that run efficiently. Fixing schedules and sequences is often the cheapest energy savings in a building. We’ll find it.

Our work

How it works

1

Call or send a request

Tell us the equipment, what it’s doing, and how urgent it is.

2

We come look

A field-experienced tech or estimator sees it in person. Most diagnostics take 30 minutes or less.

3

Straight price first

You get what’s wrong, what it takes, and what it costs before we start.

4

Done right, written up

We finish clean, test it, and leave a written record of what we did.

What our clients say

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Norman Domingo
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I’m very satisfied with Omni Mechanical and happy to support their company. Tom is great to work with—professional, knowledgeable, and excellent with customer service. As a fellow business owner in the HVAC industry, I really appreciate how well he communicates and works with other contractors and colleagues. Tom and the Omni team do a great job, and I highly recommend them to anyone looking for reliable and professional HVAC services. Keep up the great work!
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Noel Dubuque profile picture
Noel Dubuque
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Finding a company that genuinely stands behind its work is rare. Omni exceeds every expectation. They are been honest, professional, and committed to doing the job the right way. They communicate clearly, follow through on every promise, and never cut corners. It's obvious they take immense pride in their craftsmanship, and that level of dedication shows in everything they do. What is most impressive goes beyond the quality of their work, it is their integrity. They are the kind of people who treat your project as if it were their own, offering honest recommendations and making sure every detail is right before they consider the job complete. If you're looking for a mechanical company you can trust completely, this is it. They are truly the best in the business. This is exactly who you want taking care of your home or business. Thank you Chris Beggs and the team for all you do for us! We! We!
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Chris Hull profile picture
Chris Hull
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As an electrical company, we've worked alongside a lot of mechanical contractors, Omni Mechanical truly stands out. They show up on time, take pride in their work, and make every shared job feel like a true team effort. We're proud to call them a trusted partner and wouldn't hesitate to recommend them to anyone looking for top-quality HVAC work.
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Cheri Paul profile picture
Cheri Paul
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I have known the owners of Omni Mechanical for 10 years. Their integrity, professionalism, and honesty are top notch. You will look far and wide, and quite possibly never find another company that compares with their credibility, and striving to please their customers. Honesty and integrity are not common this day and age! This company has it all! I would highly recommend them for ANY Commercial work that you need to have done! A+
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IAN ANDERSON profile picture
IAN ANDERSON
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It's truly a relief to have such a dependable mechanical contractor right here in the Seattle area, especially one that prioritizes exceptional customer service. Omni Mechanical not only handles mechanical installations but also offers top-notch engineering services. Their full design-build team ensures a seamless process from start to finish. I'm pleased to say that I will definitely be partnering with Omni for all future commercial projects. Their professionalism and commitment to quality make them an invaluable asset to any project team.

Common questions

Can you work with our existing controls system?

In most cases, yes. We’ll tell you whether yours is worth keeping or due for replacement.

Do you do controls on small buildings?

Yes. Smart thermostats, zoning and simple scheduling can make a big difference in small commercial spaces too.

Will a controls upgrade lower my energy bill?

Usually. Bad schedules and broken sensors are some of the most common causes of wasted energy we find.

What is a BAS or BMS?

A building automation system (BAS), also called a building management system (BMS), is the central control system that runs schedules, setpoints and sequences for HVAC equipment and lets you see what it’s doing.

Ready when you are

Tell us what’s going on. We get back to you as fast as we can.

Licensed, bonded & insured · WA Contractor License OMNIMMI779PR · WA Electrical Contractor (HVAC/Refrigeration) EC OMNIMMI740OS · Commercial financing available

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