Flow Environmental Systems
- Company typePrivate
- Founded2022
- HeadquartersSeattle, United States
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
What Flow Environmental Systems does
Flow Environmental Systems is a US-based engineering company founded in 2022 and headquartered in Rogers, Minnesota, that develops and commercializes commercial and industrial HVAC&R systems based on CO2 (R-744) refrigerant heat pumps. Its proprietary technology uses naturally occurring carbon dioxide as the working fluid to deliver heating, cooling, and domestic hot water from a single unit, with claimed capabilities including simultaneous heating and cooling without reversing valves, hot water delivery up to 180°F/82°C, COPs exceeding 7, ambient operation from 0°F/-18°C to 120°F/49°C without defrost derate, and a 70% reduction in water use versus traditional cooling towers. The technology is protected by two pending US patents and a patent-pending variable refrigerant flow system.
The company sells three core product configurations: a Water-to-Water Heat Pump (WWHP), an Air-to-Water Heat Pump (AWHP) Split System, and an AWHP Packaged System marketed as a "mechanical room in a box" intended to replace chillers, cooling towers, boilers, coolers, and freezers. Revenue is generated through hardware sales of these systems to commercial buildings, industrial and healthcare facilities, agriculture, and district energy customers, distributed via a network of regional sales representatives and channel partners — DMG North, DMG HVAC, Gil-Bar, Johnson Barrow, SVL, Blackmore and Glunt, APA in the US, and HATCH in Canada — supplemented by direct demonstration projects with named customers such as Berkeley Lab, California Creamery, Union Theological Seminary, and Summit Brewing Co.
Flow has raised approximately $23 million in disclosed capital, comprising a $3 million SEC-exempt offering in August 2023 and a $20 million raise announced in February 2026 to fund a new manufacturing plant for the Packaged System line, the company's first dedicated factory. The company operates with 1-10 employees, is led by CEO Rick Mauk, CTO Sean Jarvie, and CFO Navaid Burney, and has been recognized through the Grid Catalyst 2025 cohort, as a finalist/runner-up in the New York Empire Technology Prize (2024), and on Finance and Commerce's Best Startup Businesses 2026 list.
Flow Environmental Systems firmographics
Firmographics- Name
- Flow Environmental Systems
- Legal name
- Flow Environmental Systems, Inc.
- Website
- https://flowenvirosys.com
- Company type
- Private
- Founded year
- 2022
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Ownership category
- akta.pro rank
Flow Environmental Systems industry classification
Industry- Product category
- Commercial HVAC Heat Pump Equipment
- NAICS
- Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Power Boiler and Heat Exchanger Manufacturing (33241)
- SIC
- Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Refrigeration & Service Industry Machinery (3580), Heating Equipment, Except Electric & Warm Air Furnaces (3433)
- akta.pro primary industry
- Heat Pumps (Air/Water/Ground Source) (IMAHAKAF)
- akta.pro secondary industries
- Chillers & Cooling Plant Equipment (IMAHAKAE), Heat Exchangers & Thermal Transfer Equipment (IMAHAKAC), Heat Exchangers, Coils & Hydronic HVAC Components (IMADANAF), Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)
Keywords
Where Flow Environmental Systems is headquartered
LocationHeadquarters
- HQ city
- Seattle
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Flow Environmental Systems business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D
Revenue model
- CO₂ Heat Pump Equipment Sales: Flow Environmental Systems generates revenue through the sale of commercial heat pump equipment including Water-to-Water Heat Pumps (WWHP), Air-to-Water Heat Pumps (AWHP) Split Systems, and Air-to-Water Heat Pumps (AWHP) Packaged Systems. The company sells directly to commercial and industrial customers through regional sales representatives and channel partners.
- HVAC&R System Solutions: The company provides complete HVAC&R (Heating, Ventilation, Air Conditioning, and Refrigeration) system solutions that can replace multiple traditional systems (chillers, cooling towers, boilers, coolers and freezers) with a single CO₂ heat pump solution.
Go-to-market motion2 records
Distribution channels8 records
Marketing channels7 records
Flow Environmental Systems product offering
Product offeringCore offering
Flow Environmental Systems designs and manufactures commercial and industrial CO2 (R-744) heat pump equipment for HVAC&R applications. Its product portfolio consists of three core configurations: Water-to-Water Heat Pumps (WWHP), Air-to-Water Heat Pumps (AWHP) Split Systems, and Air-to-Water Heat Pumps (AWHP) Packaged Systems marketed as a 'mechanical room in a box'. The systems deliver simultaneous heating and cooling, hot water up to 180°F/82°C, and COPs exceeding 7 while replacing traditional chillers, cooling towers, boilers, coolers and freezers.
Product overview
Flow Environmental Systems is a US-based engineering company offering a portfolio of CO₂ heat pump products for commercial and industrial HVAC&R applications. Their product lineup consists of three core heat pump configurations: Water-to-Water Heat Pumps (WWHP) and Air-to-Water Heat Pumps (AWHP) available in both Split System and Packaged System variants. The AWHP Packaged System is marketed as a 'mechanical room in a box' solution that can replace traditional HVAC systems comprising chillers, cooling towers, boilers, coolers, and freezers. All products use natural CO₂ (R-744) as refrigerant, generate hot water up to 180°F/82°C, and support simultaneous heating and cooling operations.
Differentiator
Problem solved
Functional benefit
Products and services
- Water-to-Water Heat Pump (WWHP)
Quantifiable outcome
- COPs exceeding 7 for ultra-high efficiency operation
- +5 more outcomes
Companies that use Flow Environmental Systems
Customer profileNamed customers4 records
Segments5 records
Ideal customer profiles3 records
Flow Environmental Systems technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
Flow Environmental Systems partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered core and minor.
- Grid CatalystcoreFlow Environmental Systems was named to the Grid Catalyst 2025 cohort, a Minneapolis-based clean energy accelerator program. The program is funded mainly by Minnesota state funds and aims to support domestic, environmentally friendly energy solutions. Flow participates in demonstration projects with partner companies like Summit Brewing Co.
- St. Paul Local 455coreFlow Environmental Systems teamed up with St. Paul Local 455 for CO₂ heat-pump training and demonstrations. This partnership supports workforce development and market awareness for CO₂ heat pump technology through hands-on training programs.
- SVLcoreSVL serves as a key sales representative and distributor for Flow, providing local sales support and technical expertise. SVL has created extensive resources about Flow's CO₂ heat pump technology and offers training and demonstration capabilities for the products.
- DMG (North and HVAC)coreDMG North and DMG HVAC serve as regional sales representatives for Flow Environmental Systems. DMG is installing an operational Flow ANSWR CO₂ Heat Pump at their facilities to aid training and market awareness, and operates a Decarbonization Training Center.
- Gil-BarcoreGil-Bar serves as a regional sales representative for Flow Environmental Systems, providing local coverage and customer support for commercial HVAC projects.
- Johnson BarrowcoreJohnson Barrow serves as a regional sales representative for Flow Environmental Systems, providing local coverage for commercial HVAC markets.
- Blackmore and Glunt (B-G)minorB-G serves as a regional channel partner for Flow Environmental Systems, distributing HVAC products in specific territories.
- APAminorAPA serves as a regional sales representative partner for Flow Environmental Systems.
- HATCHcoreHATCH serves as the Canadian regional sales representative for Flow Environmental Systems, covering markets including Toronto and broader Ontario region.
- Summit Brewing Co.minorSummit Brewing Co. partnered with Grid Catalyst (which includes Flow Environmental Systems) for clean energy demonstration projects, showcasing CO₂ heat pump technology applications.
- Georgetown University MS-ESM ProgramminorGeorgetown MS-ESM students bridge business and science with Flow Environmental Systems in their capstone project, providing academic collaboration and research support.
Scale indicators5 records
Recent moves7 records
Expansion highlights5 records
Flow Environmental Systems competitors and assessment
Company assessmentBroad incumbents
- Bosch Thermotechnology: Global manufacturer of commercial and residential heat pumps, including CO2-based systems in select markets. Competes with Flow in commercial heat pump decarbonization, particularly in European-style low-GWP product lines.
- Carrier Global: Major HVAC and refrigeration manufacturer with commercial chillers, heat pumps, and refrigerant portfolios. Competes directly with Flow in commercial HVAC decarbonization, with growing investment in natural-refrigerant systems.
- Johnson Controls: Large building HVAC and controls company offering chillers, heat pumps, and integrated building solutions. Competes with Flow in commercial and industrial HVAC decarbonization, with broad service network and installed base.
- Trane Technologies: Global HVAC manufacturer offering commercial chillers, heat pumps, and refrigerants under Trane and Thermo King brands. Competes broadly in commercial HVAC where Flow targets its CO2 heat pumps; has substantial R&D in low-GWP refrigerants.
- Lennox International: Established HVAC manufacturer serving commercial and residential markets. Competes in commercial heat pump space where Flow targets its CO2 systems, particularly for building electrification and decarbonization retrofits.
- Daikin Applied: US arm of Daikin, a global HVAC leader, with strong heat pump portfolio and aggressive expansion into low-GWP and CO2 refrigerant technologies. Competes with Flow on efficiency and refrigerant sustainability in commercial heat pump applications.
- Mitsubishi Electric Trane HVAC US: Joint venture selling Mitsubishi's variable-refrigerant-flow and commercial heat pump systems across North America. Overlaps with Flow's commercial HVAC focus, particularly in commercial buildings and cold-climate heat pump performance.
Direct peers
- Star Refrigeration: UK-based industrial refrigeration specialist with leading portfolio of CO2 and natural-refrigerant systems for commercial and industrial applications. Directly comparable technology and customer overlap with Flow in CO2 heat pump decarbonization.
- Mayekawa: Japanese industrial refrigeration manufacturer with extensive CO2 (R-744) and natural refrigerant heat pump and refrigeration systems. Directly comparable to Flow in commercial and industrial CO2-based HVAC&R applications.
- Sanden International: Japanese manufacturer known for CO2 (R-744) heat pump technology in HVAC and hot water applications. Closest direct competitor to Flow, with commercial-scale CO2 heat pump products targeting similar decarbonization use cases.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Flow Environmental Systems social profiles
Digital presenceFlow Environmental Systems financial estimates
Financial estimateRevenue estimate
Valuation estimate
Flow Environmental Systems leadership team
Management profileNumber of profiles
Profiles3 records
Flow Environmental Systems funding detail
Funding detailFunding overview
Funding rounds3 records
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Flow Environmental 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 Flow Environmental Systems
What does Flow Environmental Systems do?
Flow Environmental Systems designs and manufactures commercial and industrial CO2 (R-744) heat pump equipment for HVAC&R applications. Its product portfolio consists of three core configurations: Water-to-Water Heat Pumps (WWHP), Air-to-Water Heat Pumps (AWHP) Split Systems, and Air-to-Water Heat Pumps (AWHP) Packaged Systems marketed as a 'mechanical room in a box'. The systems deliver simultaneous heating and cooling, hot water up to 180°F/82°C, and COPs exceeding 7 while replacing traditional chillers, cooling towers, boilers, coolers and freezers.
Is Flow Environmental Systems a public or private company?
Flow Environmental Systems is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Flow Environmental Systems founded?
Flow Environmental Systems was founded in 2022. It employs 1 to 10 people.
Where is Flow Environmental Systems based?
Flow Environmental Systems is headquartered in Seattle, United States, in the North America region.
How does Flow Environmental Systems make money?
Two revenue lines are on record. CO₂ Heat Pump Equipment Sales are the primary driver. The others are HVAC&R System Solutions.
Who are Flow Environmental Systems's main competitors?
Broad incumbents on record are Bosch Thermotechnology, Carrier Global, Johnson Controls, Trane Technologies, Lennox International, Daikin Applied and Mitsubishi Electric Trane HVAC US. Direct peers are Star Refrigeration, Mayekawa and Sanden International.
Does Flow Environmental Systems have an API?
No public API is recorded for Flow Environmental Systems.
What industry is Flow Environmental Systems in?
Flow Environmental Systems's product category is Commercial HVAC Heat Pump Equipment. Its primary akta.pro industry code is IMAHAKAF, Heat Pumps (Air/Water/Ground Source), with a secondary code of IMAHAKAE, Chillers & Cooling Plant Equipment. Its NAICS code is 33341 and its SIC code is 3585.