Commercial HVAC · Mechanical Engineer-Led
Commercial HVAC — St. Louis, MO.
Mechanical Engineer Thomas Hoffmann has been designing and installing energy-efficient HVAC systems for St. Louis businesses for over 30 years. Light commercial, multi-tenant, office, retail, restaurant, and small industrial — we handle the full HVAC lifecycle with the cost savings you want and the technical depth you need.
Engineer-Led Design
Load calcs, not guesswork
24/7 Response
Same-day commercial repair
Energy-Efficient
Lower operating costs
Locally Owned
Based in Des Peres, MO
Cooling
Commercial Air Conditioning
A failed cooling system can shut down a business in hours — lost productivity, lost revenue, and uncomfortable customers and staff. We handle installation, repair, and preventive maintenance on commercial cooling systems across the St. Louis metro. Rooftop units, split systems, packaged units, and light commercial chillers. 24/7 emergency service with same-day repairs in most cases.
Installation
Right-sized systems chosen for your facility, load, and budget. Engineer-led load calculations on every install.
Repair
24/7 emergency service. We diagnose accurately and typically restore service the same day. Don’t wait for it to fail.
Maintenance
Preventive programs that improve efficiency, reduce operating costs, and prevent the breakdowns that shut businesses down.
Heating
Commercial Heating Services
A heating failure during a St. Louis cold snap means uncomfortable employees, unhappy customers, and potential business closure. We service nearly all makes and models of commercial heating equipment — gas furnaces, boilers, rooftop heating units, and heat pumps. New installations get proper load calculations and engineer-designed placement to ensure efficient performance and easy access for future maintenance. Repairs are handled 24/7 with same-day service in most cases.
Indoor Air Quality
Commercial IAQ Solutions
Air quality directly affects the health, productivity, and comfort of everyone inside a commercial building — employees, customers, tenants. We perform on-site air quality evaluations that include walkthroughs, air handler and distribution inspections, and spot measurements. From there, we recommend and install clean-air technology sized to your facility — not off-the-shelf products that don’t fit. Each business has unique IAQ challenges, and our engineering background lets us design custom solutions where standard products fall short.
Maintenance Programs
Preventive Maintenance Plans
No commercial HVAC service we offer is more cost-effective than preventive maintenance. Scheduled tune-ups catch failing components before they cause shutdowns, restore efficiency lost to dirt and wear, and meaningfully extend equipment life — pushing out the cost of major replacements. Our commercial maintenance programs include scheduled spring and fall visits, documented service records (important for warranty claims), and priority emergency response when something does go wrong. Most clients see the program pay for itself in avoided repairs the first year.
Industries We Serve
Light Commercial & Small-to-Mid Industrial
Office buildings, multi-tenant properties, retail, restaurants, medical and dental offices, light manufacturing, apartment buildings, small warehouses, and storefronts across the St. Louis metro.
Common Questions
Commercial HVAC Questions, Answered.
What size businesses do you serve?
We focus on light commercial and small-to-mid industrial — offices, multi-tenant buildings, retail, restaurants, medical and dental offices, light manufacturing, apartment buildings, and small warehouses. If you have rooftop units, packaged systems, or split commercial systems, we can handle them. For very large industrial chillers or institutional facilities, we’ll be upfront if the project is outside our scope.
Do you offer emergency commercial HVAC service?
Yes, 24/7. We answer calls directly — not through a third-party dispatch service — and respond as quickly as possible. Commercial emergencies usually mean a closed business, so we prioritize them. Call (314) 471-7625 any time.
What’s included in a commercial maintenance program?
Twice-yearly scheduled tune-ups (spring AC, fall heating), full inspection of all electrical, mechanical, and safety components, coil and burner cleaning, refrigerant level verification, performance testing, written service records, and priority emergency response. Plan details and pricing depend on the equipment list at your facility — call us for a custom quote.
Can you design and install a new HVAC system from scratch?
Yes. Tom Hoffmann is a Mechanical Engineer, and we provide design-build services for new commercial HVAC installations — load calculations, system sizing, equipment selection, ductwork design, and installation. This includes new construction, tenant build-outs, and full system replacements where the existing layout no longer makes sense.
What brands of commercial equipment do you service?
Nearly all major brands — Trane, Carrier, Lennox, York, Daikin, Rheem, Goodman, and others. As an authorized Trane dealer, we have the deepest expertise on Trane commercial equipment, but our technicians are factory-trained on a wide range of platforms.
How do I know if my commercial HVAC system needs replacement?
Common signs: rising utility costs without a usage change, recurring repairs each season, uneven temperatures across the facility, equipment 15+ years old, R-22 refrigerant systems (no longer manufactured), and increasing comfort complaints from tenants or staff. We’ll do an honest evaluation and tell you whether continued repair makes sense or replacement is the smarter long-term move.
Are there energy rebates available for commercial HVAC upgrades?
Often, yes. Ameren Missouri offers commercial energy efficiency rebates for qualifying HVAC upgrades, and federal tax incentives (Section 179, accelerated depreciation, and the Inflation Reduction Act) can apply to commercial system replacements. We’ll show you what your specific project qualifies for during the proposal stage.
Do you provide written proposals for new commercial projects?
Yes. For any new install, replacement, or significant project, we provide a detailed written proposal that includes equipment specifications, load calculations, scope of work, timeline, and pricing. Verbal estimates are fine for service work and minor repairs.
Keep Your Business Running.
Free consultations, engineer-led system design, 24/7 emergency response. St. Louis’s locally owned commercial HVAC team — no franchise call centers, no upsell.