Commercial HVAC
HVAC solutions built for your business.
From rooftop units to building controls, Ekern keeps offices, retail, multi-unit, and light industrial properties comfortable, efficient, and running without interruption.
Since 1952
Years in business
24 / 7
Emergency service
Flandreau & Brookings
SD locations
NATE-certified
Technicians
Commercial HVAC Service
We handle the systems that keep businesses running — installation, repair, and ongoing service for equipment of every size.
- Rooftop unit (RTU) repair, replacement & service
- Packaged & split-system HVAC service
- Make-up air, ventilation & exhaust systems
- Commercial refrigeration & temperature controls
- Building automation, zoning & controls
- Preventive maintenance & priority service agreements
Building Systems & Projects
New construction, remodels, retrofits, and mechanical systems designed around your building's needs and budget.
- New-construction HVAC design & install
- Retrofit upgrades for offices, retail & multi-unit
- Boiler & hydronic system service
- Commercial plumbing & mechanical systems
- Energy-efficiency assessments & recommendations
- 24/7 emergency repair dispatch
How it works
Commercial HVAC done right, step by step
Assess
We survey the building, talk through pain points, and inspect equipment before recommending anything.
Plan & quote
You get a clear scope, timeline, and upfront pricing — no surprises, no pressure.
Install or repair
Our licensed technicians execute the work cleanly, with minimal disruption to your operation.
Maintain
We keep the system tuned and document everything so you're ready for the next season.
Troubleshooting
Commercial HVAC problems we solve
Uneven temperatures
Hot and cold zones across floors or departments.
Poor airflow
Weak ventilation, stuffy spaces, or pressure imbalances.
Controls not responding
Thermostats, sensors, or building automation misbehaving.
High utility costs
Bills climbing without a change in building usage.
Brands we service
Experienced with the equipment you rely on
Why Ekern
The local crew for commercial systems
Licensed & insured
Master plumbers and NATE-trained HVAC technicians. Permits pulled, code-compliant, warranty-backed.
Upfront pricing
You approve the price before we start. No surprise add-ons, no after-hours scare tactics.
24/7 emergency service
Dead RTUs and broken controls don't keep business hours. Neither do we.
Service area
Eastern South Dakota, served locally.
With offices in Flandreau and Brookings, our technicians live and work in the communities they serve. Most calls arrive within 15 miles of a crew member.
- Flandreau, SD
- Brookings, SD
- Moody & Brookings counties
- Surrounding eastern SD communities
Reviews
What customers say about our work
"Furnace quit at 11pm in February with a newborn in the house. Ekern had a tech at our door before 7am and a new high-efficiency unit running by noon. Calm, professional, fair price."
Sarah M. — Brookings, SD
"Used them for a water heater last year and a full AC replacement this spring. They show up when they say, leave the place cleaner than they found it, and stand behind the work."
Dave K. — Flandreau, SD
"Got three quotes for a new furnace and AC. Ekern wasn't the cheapest, but their walkthrough was the most thorough and the install was flawless. Worth every dollar."
Janelle T. — Brookings, SD
FAQ
Questions about commercial HVAC
What types of commercial buildings do you service?+
We work with offices, retail spaces, multi-unit residential, schools, churches, agricultural facilities, and light industrial properties throughout eastern South Dakota.
Do you offer maintenance agreements?+
Yes. Our preventive maintenance agreements include scheduled inspections, filter changes, coil cleaning, and priority emergency response — helping avoid costly breakdowns.
Can you service rooftop units and packaged systems?+
Absolutely. We install, repair, and maintain RTUs, packaged systems, split systems, make-up air units, and exhaust ventilation for commercial properties.
Do you handle new construction and remodels?+
Yes. We partner with builders, architects, and property owners on new construction, tenant improvements, and system retrofits.
Are your technicians certified for commercial work?+
Yes. Our team includes NATE-certified technicians and licensed professionals experienced with commercial-grade equipment, controls, and code requirements.
Ready when you are
Planning a new build or system upgrade?
Call for a commercial assessment, or request service online and we'll get back fast.