AC Systems
AC Systems, Inc. is a privately held HVAC equipment distributor and service provider representing 30+ manufacturers (AAON, LG, Mitsubishi, Cambridge Air Solutions) to commercial, institutional, and industrial customers across 45 U.S. states, with engineering, integration, service, parts, and training capabilities from its Maryland Heights, MO headquarters.
- Company typePrivate
- Founded1970
- HeadquartersMaryland Heights, United States
- Headcount11–50
- GTM typeB2B
- OfferingServices
What AC Systems does
AC Systems, Inc. is a privately held HVAC equipment distributor, manufacturer's representative, and service provider founded circa 1970 in the St. Louis, Missouri area and led by the Stanec family. The company serves commercial, institutional, and industrial customers across 45 U.S. states from its Maryland Heights, MO headquarters, with a parts-only location in Carbondale, IL and an advanced training center built in 2017. Its portfolio spans more than 30 manufacturer brands, with core representation in AAON (semi-customized HVAC equipment), LG (VRF, heat pump chillers, split systems), Mitsubishi (ductless and VRF), Cambridge Air Solutions (makeup air units), Mason Industries (seismic and vibration control), and Rheem, alongside a long tail of complementary building controls, filtration, geothermal, and specialty HVAC brands.
The company's business model combines equipment distribution, project-based engineering and integration, ongoing service and maintenance, parts counter sales, and paid training programs. Expert sales engineers work with customers from project conceptualization through commissioning and operation, while 14 union-affiliated service technicians (Local 562 and 160) provide field service backed by mobile parts inventory and 2,500 hours of annual remote technical support. Pricing is quote-based for equipment and service, while training courses are unit-priced ($20-$375 per person). Notable project work includes the 645+ ton CityPark STL stadium integration with Tridium/Niagara BAS, AAON systems for Schnucks Markets and IKEA St. Louis, VRF deployments for Continental Tire, and specialized humidity control for healthcare, food manufacturing, and organ preservation environments.
Customer segments are diversified across retail, education (K-12 and higher ed), manufacturing/industrial, healthcare/pharmaceutical, sports venues, and historic/nonprofit institutions, indicating a vertical-led segmentation approach. The company markets primarily through website case studies, training programs, and professional referrals, supported by an enterprise field sales motion rather than digital demand generation. No revenue, funding, or financial performance figures are disclosed in the source data.
AC Systems firmographics
Firmographics- Name
- AC Systems
- Legal name
- AC Systems, Inc.
- Website
- https://acsystemsinc.net
- Company type
- Private
- Founded year
- 1970
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- AC Systems, Inc. is a privately held HVAC equipment distributor and service provider representing 30+ manufacturers (AAON, LG, Mitsubishi, Cambridge Air Solutions) to commercial, institutional, and industrial customers across 45 U.S. states, with engineering, integration, service, parts, and training capabilities from its Maryland Heights, MO headquarters.
- Ownership category
- akta.pro rank
AC Systems industry classification
Industry- Product category
- HVAC Equipment Distribution and Services
- NAICS
- Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413)
- SIC
- Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Industrial Instruments For Measurement, Display, And Control (3823), Refrigeration & Service Industry Machinery (3580)
- akta.pro primary industry
- HVAC Equipment (Heating, Cooling & Air Handling) (IMAHAKAB)
- akta.pro secondary industries
- HVAC Controls, Thermostats & Building Automation Installation (HSAOAGAJ), Air Conditioner (AC) Repair & Maintenance (HSAOAHAF), Ventilation, Ducting & Air Distribution Equipment (IMAHAKAG)
Keywords
Where AC Systems is headquartered
LocationHeadquarters
- HQ city
- Maryland Heights
- HQ country
- United States
- HQ region
- North America
Offices3 records
Markets served
AC Systems business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- HVAC Equipment Sales: Sales of HVAC equipment from multiple manufacturers including AAON, LG, Mitsubishi, and others. Expert sales engineers provide optimal solutions from conceptual stage through commissioning and operation.
- Service and Maintenance: Service technicians specializing in leading brands provide installation, service, and maintenance. 3.2 million service miles driven since 2008, 2,500 hours remote technical support annually.
- Parts Sales: Parts counter sales including tools, compressors, control boards, refrigerant valves, motors, VFDs, and starters. Supports all represented brands.
- Training Programs: Training center offering hands-on equipment training from AAON, LG, Mitsubishi, Mason and others. Classes for installation, service, maintenance, design and engineering.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | One time | LG Residential and Light Commercial Essentials |
| Unit Pricing | One time | AAON Training & Programming |
| Unit Pricing | One time | LG MLV-01 Installation Class |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels3 records
AC Systems product offering
Product offeringCore offering
AC Systems, Inc. is a manufacturer's representative and distributor of HVAC equipment from over 30 manufacturers including AAON, LG, Mitsubishi, Cambridge Air Solutions, and Rheem. The company provides HVAC equipment sales, installation, service, and maintenance across 45 states, supported by an in-house parts store and an advanced training center offering hands-on equipment training.
Product overview
AC Systems, Inc. is a manufacturer representative/distributor specializing in HVAC solutions, representing over 30 manufacturers offering innovative systems, equipment, and solutions. The portfolio includes AAON (semi-customized HVAC equipment), LG (VRF, heat pump chillers, split systems, PTACs), Mitsubishi (ductless and VRF systems), Cambridge Air Solutions (direct-fired and evaporative solutions), and Rheem (air, water, pool solutions), among others. The company also offers dedicated product lines for building controls (Airzone, Distech Controls, Specified Controls), industrial filtration (Nederman), geothermal solutions (GeoComfort by Enertech), energy recovery (XeteX, Vents-US, Reversomatic), and specialty heating/cooling (Zehnder Rittling, Roberts Gordon, Radiant Electric Heat). Supporting these product lines, AC Systems provides parts support through its in-house parts store and training services through its advanced training center built in 2017, offering courses on AAON, LG, Mitsubishi, Mason, and other major brands.
Differentiator
Problem solved
Functional benefit
Products and services
- AAON HVAC Equipment Distribution
Quantifiable outcome
- Eliminated tens/hundreds of thousands of dollars in rental costs for IKEA St. Louis by providing temporary control solution
- +1 more outcomes
Companies that use AC Systems
Customer profileNamed customers12 records
Segments6 records
Ideal customer profiles7 records
AC Systems technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration4 records
Feature3 records
AC Systems partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered core, major and supporting.
- AAONcoreAAON is described as a 'well-recognized category leader' creating semi-customized HVAC equipment. AC Systems is an authorized representative providing AAON equipment for projects including DOAS units, rooftop units, water source heat pumps, and dehumidification systems.
- LGcoreLG is a leader in commercial and residential heat pump chillers, VRF, split systems, and PTACs. AC Systems provides LG VRF systems and split systems integrated with building automation.
- MitsubishicoreMitsubishi is a leading provider of ductless and VRF systems. Available for design build market through AC Systems.
- Cambridge Air SolutionsmajorCambridge Air Solutions is a renowned resource for efficient direct-fired and evaporative solutions for warehouse and manufacturing. AC Systems provides Cambridge MUA units for projects.
- Mason IndustriesmajorMason Industries is world-renowned for seismic/wind restraints and noise/vibration control solutions for HVAC markets. AC Systems provides Mason products.
- Distech ControlssupportingDistech Controls is recognized at the forefront of intelligent building solutions with technologies for seamless integration.
- Roberts GordonmajorRoberts Gordon manufactures energy-efficient low and high-intensity infrared radiant heaters for industrial and commercial applications.
- XeteXsupportingXeteX designs and manufactures custom high-performing air handling, energy recovery, ventilation, and desiccant solutions.
Scale indicators6 records
Recent moves6 records
Expansion highlights6 records
AC Systems competitors and assessment
Company assessmentDirect peers
- Shapiro & Duncan: HVAC manufacturer's representative also headquartered in Maryland Heights, MO — a direct local competitor carrying many of the same commercial equipment lines and serving the same Midwest design-build channel.
- R.F. MacDonald Co. Established West Coast HVAC manufacturer's representative and distributor with a similar multi-brand portfolio model, multi-state service capability, and engineering-led sales motion serving commercial and industrial customers.
- Wm. J. Donovan Co. Midwest-based HVAC manufacturer's representative providing engineered equipment, controls, and service support across commercial verticals — closely comparable business model and customer types to AC Systems.
- Mechanical Sales Associates: Regional HVAC manufacturer's representative representing multiple commercial equipment brands with field sales engineers and project support — same rep-and-engineer business model as AC Systems.
Broad incumbents
- AAON: Manufacturer of semi-customized HVAC equipment and a core OEM partner of AC Systems. Demonstrates the vertical-integration risk: AAON could in theory bypass the rep layer and sell direct on key accounts.
- Ferguson Enterprises: Largest U.S. distributor of plumbing, HVAC, and waterworks supplies. While much larger and broader in scope, Ferguson competes for the same commercial HVAC specification and supply contracts that AC Systems bids.
- Watsco: Largest U.S. HVAC distribution conglomerate. Overlaps with AC Systems on commercial equipment distribution and could absorb regional reps via acquisition or outcompete on multi-site accounts.
- Trane Technologies: Global commercial HVAC manufacturer and service provider. Competes indirectly with AC Systems on large commercial projects and could capture accounts where owners prefer a single national OEM-and-service brand.
Regional players
- Engineered Equipment Sales: Regional HVAC manufacturer's representative operating in adjacent geographies with a comparable multi-line equipment portfolio and design-build support model.
Emerging players
- ServiceTitan: Software platform purpose-built for commercial and residential HVAC service businesses. Represents a tech-driven layer that could either partner with or disintermediate traditional rep-and-service operators like AC Systems.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
AC Systems social profiles
Digital presenceAC Systems financial estimates
Financial estimateRevenue estimate
Valuation estimate
AC Systems leadership team
Management profileNumber of profiles
Profiles2 records
AC Systems funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
AC Systems M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about AC Systems
What does AC Systems do?
AC Systems, Inc. is a manufacturer's representative and distributor of HVAC equipment from over 30 manufacturers including AAON, LG, Mitsubishi, Cambridge Air Solutions, and Rheem. The company provides HVAC equipment sales, installation, service, and maintenance across 45 states, supported by an in-house parts store and an advanced training center offering hands-on equipment training.
Is AC Systems a public or private company?
AC Systems is a private company. It is classified as family owned and is currently operating.
When was AC Systems founded?
AC Systems was founded in 1970. It employs 11 to 50 people.
Where is AC Systems based?
AC Systems is headquartered in Maryland Heights, United States, in the North America region.
How does AC Systems make money?
Four revenue lines are on record. HVAC Equipment Sales are the primary driver. The others are service and Maintenance, parts Sales and training Programs.
Who are AC Systems's main competitors?
Direct peers on record are Shapiro & Duncan, R.F. MacDonald Co., Wm. J. Donovan Co. and Mechanical Sales Associates. Broad incumbents are AAON, Ferguson Enterprises, Watsco and Trane Technologies. Engineered Equipment Sales is listed as a regional player. ServiceTitan is listed as an emerging player.
Does AC Systems have an API?
No public API is recorded for AC Systems.
What industry is AC Systems in?
AC Systems's product category is HVAC Equipment Distribution and Services. Its primary akta.pro industry code is IMAHAKAB, HVAC Equipment (Heating, Cooling & Air Handling), with a secondary code of HSAOAGAJ, HVAC Controls, Thermostats & Building Automation Installation. Its NAICS code is 33341 and its SIC code is 3585.