Multistack
Multistack is a private U.S. manufacturer of modular HVAC chillers, MagLev oil-free centrifugal chillers, and dedicated heat recovery chillers, serving commercial, healthcare, education, government, and research customers globally through a manufacturer-rep network.
- Company typePrivate
- Founded1989
- HeadquartersSparta, United States
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What Multistack does
Multistack, LLC is a privately held U.S. manufacturer of modular HVAC chiller systems founded in 1989 and headquartered in Sparta, Wisconsin, with a second manufacturing facility in Winona, Minnesota. The company designs and builds modular air-cooled and water-cooled chillers, MagLev oil-free magnetic levitation centrifugal chillers, dedicated heat recovery chillers (DHRC), modular heat pumps, MultiPRO central plant controllers, and AuraGreen energy recovery ventilators, with capacity spanning 10 to 1,400+ tons. Multistack pioneered the dedicated heat recovery chiller category and has applied MagLev compressor technology across its product lines for over fifteen years, supported by its proprietary FlexSys control system that enables N+1 redundancy, fail-to-run operation, and BAS interoperability in ASHRAE 15-compliant configurations.
The company sells primarily through a global network of manufacturer representatives and distributors covering the USA, Canada, Europe, Africa, Australia, the Caribbean, Central America, South America, China, Guam, and Israel, supported by an internal inside sales team coordinating North American accounts. Revenue is generated almost entirely through project-based hardware sales (quote-based, not publicly disclosed), supplemented by paid technical training services (Service School and Sales School courses at $1,500–$2,050 per attendee) and post-sale technical support. Customers are concentrated in commercial buildings, healthcare facilities, educational institutions, government/mission-critical sites, and research laboratories, with documented installations at the Empire State Building, Princeton University, the U.S. Embassy in Santiago, Wellstar hospitals, and the J. Craig Venter Institute.
Multistack firmographics
Firmographics- Name
- Multistack
- Legal name
- Multistack, LLC
- Website
- https://multistack.com
- Company type
- Private
- Founded year
- 1989
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Multistack is a private U.S. manufacturer of modular HVAC chillers, MagLev oil-free centrifugal chillers, and dedicated heat recovery chillers, serving commercial, healthcare, education, government, and research customers globally through a manufacturer-rep network.
- Ownership category
- akta.pro rank
Multistack industry classification
Industry- Product category
- Commercial HVAC and Modular Chillers
- NAICS
- Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Power Boiler and Heat Exchanger Manufacturing (332410)
- SIC
- Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Refrigeration & Service Industry Machinery (3580)
- akta.pro primary industry
- Chillers & Cooling Plant Equipment (IMAHAKAE)
- akta.pro secondary industries
- HVAC Equipment (Heating, Cooling & Air Handling) (IMAHAKAB), Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC), Chillers, Boilers & Central Plant Operations (BPABACAG)
Keywords
Where Multistack is headquartered
LocationHeadquarters
- HQ city
- Sparta
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Multistack business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- HVAC Equipment Sales: Sale of modular chiller systems, heat recovery units, air-cooled and water-cooled chillers, and packaged HVAC solutions. Products range from residential/commercial modular units to large industrial systems (60-1400 tons capacity).
- Technical Training Services: Multistack Service School and Sales School training programs for HVAC technicians and sales representatives. Course fees range from $1,500-$2,050 depending on course length and complexity.
- Service and Technical Support: Technical services including troubleshooting support, service request tickets, and ongoing customer support through regional representatives.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Air-Cooled & Water-Cooled Modular Training - 4 days |
| Other | Multi-year contract | Heat Pump & Heat Recovery Training - 3 days |
| Other | Multi-year contract | MagLev Gen I & II Training - 5 days |
| Other | Multi-year contract | MagLev Gen III & ModMag Training - 5 days |
| Other | Multi-year contract | ARA/ARP Training - 3 days |
| Other | Multi-year contract | Sales School Training - 2 days |
Go-to-market motion3 records
Distribution channels3 records
Marketing channels6 records
Multistack product offering
Product offeringCore offering
Multistack designs and manufactures modular HVAC chillers (air-cooled and water-cooled), packaged chillers, MagLev oil-free centrifugal chillers, modular heat pumps and dedicated heat recovery chillers (DHRC), MultiPRO central plant controllers, and AuraGreen fixed plate energy recovery ventilators. Equipment is sold through manufacturer representatives worldwide to commercial, institutional, healthcare, government, and research customers requiring scalable cooling, heating, and simultaneous heat recovery.
Product overview
Multistack is a manufacturer of HVAC modular chiller systems offering a comprehensive portfolio of products organized into six main categories: Modular Solutions (Air-Cooled and Water-Cooled), Packaged Solutions, MagLev Solutions, Heating Solutions, MultiPRO central plant controllers, and AuraGreen energy recovery ventilators. The core platform consists of modular chiller technology with individual products including Airstack air-cooled chillers, VME II variable speed scroll modular chillers/heaters, and MagLev oil-free centrifugal chillers. These products work together to provide scalable, efficient HVAC solutions where capacity can be added incrementally. Supporting products include MultiPRO controllers for system optimization, AuraGreen ERVs for energy recovery, and various heat recovery and heat pump modules that enable simultaneous heating and cooling applications.
Differentiator
Problem solved
Functional benefit
Brands
- MagLev: Oil-free compressor technology product line utilizing magnetic levitation bearings for superior part-load efficiency and minimal maintenance
- AuraGreen
- MultiPRO
- VME II
- Airstack
Products and services
- Modular Solutions Air-Cooled
Quantifiable outcome
- 74% reduction in chiller plant energy use at University of Hawaii Moore Hall
- +7 more outcomes
Companies that use Multistack
Customer profileNamed customers10 records
Segments5 records
Ideal customer profiles5 records
Multistack technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Multistack partnerships and signals
Strategic signalPartnerships
Nine partnerships are on record, tiered core, strategic and minor.
- SRS EnterprisescoreManufacturer's representative for New York and New Jersey region, responsible for major installations including Empire State Building and Princeton University projects
- Air Treatment CorporationcoreLos Angeles-based HVAC supplier that installed Multistack chillers at NBC Universal/CityWalk AMC Theater and J. Craig Venter Institute projects
- Trane NorthwestcoreMultistack representative in British Columbia, provided equipment for Saanich Peninsula project and installation support
- Smith EngineeringstrategicCollaborated with Princeton University to develop the innovative booster chiller solution, winner of 2017 IDEA Innovation Award
- PSIG-HawaiistrategicPerformance measurement and verification consultant for University of Hawaii Moore Hall project, providing load and efficiency measurement
- Randolph H. Murayama and AssociatesstrategicMechanical engineering firm that designed the HVAC system upgrades for University of Hawaii Moore Hall
- Opus DaytonKnight ConsultantsstrategicEngineering design team for Saanich Peninsula Thermal Energy Recovery System, awarded Federation of Canadian Municipalities Sustainable Community Award
- DEC EngineeringstrategicInnovative Canadian engineering corporation that designed the unique 'mini-plant' solution with Multistack DHRC chiller for Saanich Peninsula project
- Martinez InternationalminorContractor that installed the DHRC system at U.S. Embassy Santiago, Chile
Scale indicators6 records
Recent moves6 records
Expansion highlights6 records
Multistack competitors and assessment
Company assessmentDirect peers
- Trane Technologies: Trane is one of the largest commercial HVAC manufacturers globally and a direct competitor in modular and conventional chillers, including air-cooled, water-cooled, and heat recovery configurations sold to the same enterprise and institutional customers.
- Carrier Global: Carrier manufactures commercial chillers (AquaEdge, AquaSnap) and modular HVAC solutions, directly competing with Multistack's modular chiller portfolio in commercial buildings, healthcare, and government projects.
- York (Johnson Controls): York by Johnson Controls produces centrifugal, scroll, and modular chillers (e.g., YK, YVAA, YMA) and competes head-to-head with Multistack in commercial/industrial cooling and heat recovery applications.
- Daikin Applied: Daikin Applied manufactures air-cooled and water-cooled chillers (including modular and magnetic-bearing centrifugal lines such as Magnitude) directly comparable to Multistack's MagLev and modular offerings.
- Mitsubishi Electric Hydronics & IT Cooling Systems (formerly Climaveneta): Mitsubishi Electric's hydronics division produces modular and high-efficiency chillers and heat pumps (e.g., i-FX, NX series) that compete with Multistack's modular and DHRC lines, especially in European markets.
- Smardt Chillers Group: Smardt is a specialist in oil-free magnetic-bearing centrifugal chillers and a particularly close competitor to Multistack's MagLev platform in the high-efficiency, mission-critical chiller segment.
Emerging players
- Kaltra: Kaltra is a European specialist in modular chillers and heat pumps, including magnetic-bearing oil-free designs, with a more focused product set that overlaps Multistack's modular and MagLev positioning in retrofit and European markets.
- AAON: AAON manufactures high-efficiency commercial HVAC equipment including chillers, heat pumps, and air-handling units with custom engineering — a comparable niche OEM with similar vertical-segment focus on commercial/institutional customers.
Broad incumbents
- Baltimore Aircoil Company (BAC): BAC is a long-established manufacturer of cooling towers, evaporative condensers, and ice thermal storage systems. It overlaps with Multistack on commercial cooling plant equipment and competes in integrated chiller-plant projects.
- EVAPCO: EVAPCO manufactures adiabatic, evaporative, and dry coolers plus packaged chiller plant solutions, serving the same commercial/industrial cooling end markets as Multistack's water-cooled modular chillers.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks7 records
Key highlights7 records
Customer concentration
Multistack social profiles
Digital presenceMultistack financial estimates
Financial estimateRevenue estimate
Valuation estimate
Multistack leadership team
Management profileNumber of profiles
Profiles4 records
Multistack funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Multistack M&A and investment
M&A and investmentM&A2 records
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Multistack
What does Multistack do?
Multistack designs and manufactures modular HVAC chillers (air-cooled and water-cooled), packaged chillers, MagLev oil-free centrifugal chillers, modular heat pumps and dedicated heat recovery chillers (DHRC), MultiPRO central plant controllers, and AuraGreen fixed plate energy recovery ventilators. Equipment is sold through manufacturer representatives worldwide to commercial, institutional, healthcare, government, and research customers requiring scalable cooling, heating, and simultaneous heat recovery.
Is Multistack a public or private company?
Multistack is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Multistack founded?
Multistack was founded in 1989. It employs 101 to 250 people.
Where is Multistack based?
Multistack is headquartered in Sparta, United States, in the North America region.
How does Multistack make money?
Three revenue lines are on record. HVAC Equipment Sales are the primary driver. The others are technical Training Services and service and Technical Support.
Who are Multistack's main competitors?
Direct peers on record are Trane Technologies, Carrier Global, York (Johnson Controls), Daikin Applied, Mitsubishi Electric Hydronics & IT Cooling Systems (formerly Climaveneta) and Smardt Chillers Group. Emerging players are Kaltra and AAON. Broad incumbents are Baltimore Aircoil Company (BAC) and EVAPCO.
Does Multistack have an API?
No public API is recorded for Multistack.
What industry is Multistack in?
Multistack's product category is Commercial HVAC and Modular Chillers. Its primary akta.pro industry code is IMAHAKAE, Chillers & Cooling Plant Equipment, with a secondary code of IMAHAKAB, HVAC Equipment (Heating, Cooling & Air Handling). Its NAICS code is 333415 and its SIC code is 3585.