What HotGreen Solutions does

HotGreen Solutions is a UK-based industrial technology company developing high-temperature heat pump systems that generate low-carbon process steam from electricity. The company's flagship product, the HotStack 300, is built around a proprietary IsoStack compressor that achieves a full 110°C temperature lift in a single compression stage, a design choice that reduces capital expenditure compared with multi-stage alternatives and enables 4x greater energy efficiency than conventional boilers. The HotStack system also offers 10-to-100% turndown capacity and a modular, stackable architecture intended to scale from small to large industrial loads.

The company's go-to-market is enterprise field sales targeting industrial manufacturers, with a current primary focus on the food and beverage vertical — specifically pasteurisation, brewing, distillation, drying, and sterilization applications. Identified future expansion verticals include pharmaceuticals, chemicals, pulp and paper, and textiles. Revenue is generated through hardware sales of the HotStack 300 system along with associated installation and deployment services, with pricing handled on a project-specific basis. The company is currently pre-deployment, operating a waitlist for 2027 and 2028 installations, and markets itself on a sub-two-year customer payback, projected €250k/year energy cost savings, and 1,500 tonnes CO2 avoided per MW installed.

The company was founded in 2024 and is headquartered in Datchet, United Kingdom. It operates as an independent, venture-backed private company (HotGreen Ltd) and closed a £1.2 million pre-seed funding round in October 2025 led by Empirical Ventures, with Coca-Cola Europacific Partners among the participating investors. The leadership team combines commercial, thermal engineering, and deep-tech hardware expertise drawn from prior roles at Oliver Wyman, Alfa Laval, Centrica, and several early-stage hardware ventures.

Name

HotGreen Solutions

Legal name

HotGreen Ltd

Website

https://hotgreensolutions.com

Company type

Private

Founded year

2024

Operating status

Operating

Headcount range

1–10 employees

Short description

HotGreen Solutions is a UK-based industrial heat pump company developing the HotStack 300 system, featuring proprietary IsoStack single-stage compressor technology, to deliver low-carbon process steam to industrial manufacturers, primarily in food and beverage.

Ownership category

akta.pro rank

Product category

Industrial Heat Pumps

NAICS

Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Heat Pumps (Air/Water/Ground Source) (IMAHAKAF)

akta.pro secondary industry

Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)

Keywords

• Industrial heat pumps
• Process heating equipment
• Decarbonization technology
• Electrified industrial steam
• High-temperature compressors

Headquarters

HQ city

Datchet

HQ country

United Kingdom

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Supply Chain, Personnel, Marketing or Sales, Operations

Revenue model

1. Industrial Heat Pump Systems (HotStack): Sale of industrial high-temperature heat pump systems (HotStack 300) that serve as direct replacements for traditional boilers. The systems generate low carbon steam for industrial process heat applications, generating revenue through hardware sales and associated installation/deployment services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

HotGreen Solutions designs, manufactures, and sells industrial high-temperature heat pump systems (HotStack 300) that generate low-carbon steam from electricity as a direct replacement for traditional boilers in industrial process heating. The product is powered by a proprietary IsoStack compressor that enables single-stage compression for a full 110°C temperature lift, targeting industrial manufacturers in food and beverage, with planned expansion into pharmaceuticals, chemicals, pulp and paper, and textiles.

Product overview

HotGreen Solutions offers a unified product portfolio centered on the HotStack 300 industrial heat pump system, which provides ultra-efficient, low carbon steam for industrial process heating. The core technology features the proprietary IsoStack compressor, which enables single-stage compression achieving a full 110°C temperature lift. The system is designed as a direct replacement for traditional boilers, targeting industrial applications in the food and beverage sector with applications including pasteurisation, brewing, distillation, drying, and sterilization. The company is also planning future market expansion into pharmaceuticals, chemicals, pulp and paper, and textiles sectors.

Differentiator

Problem solved

Functional benefit

Brands

• HotStack 300: A low carbon heat pump solution for industry. Direct replacement for traditional boilers. Features the IsoStack compressor technology, achieving 4x more energy efficiency than traditional boilers, saving €250k/year in energy bills, and avoiding 1,500 TCO₂/year per MW of installation.

Products and services

• HotStack 300 A low carbon industrial heat pump system that serves as a direct replacement for traditional boilers, offering up to 30% reduction in energy bills, 4x more energy efficiency than traditional boilers, and projected savings of €250k/year in energy costs for a typical facility. Built around the proprietary IsoStack compressor, it delivers a full 110°C temperature lift in a single compression stage with 10-to-100% turndown capacity and modular stackable architecture for scalable industrial process heating in pasteurisation, brewing, distillation, drying, and sterilization applications.

Quantifiable outcome

• 30% reduction in energy bills for industrial manufacturers switching from traditional boilers
• +4 more outcomes

Segments5 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators3 records

Expansion highlights5 records

Broad incumbents

• Johnson Controls: Global building and industrial HVAC/refrigeration systems manufacturer with broad heat pump portfolio across commercial and industrial segments. Large incumbent with scale, service network, and customer access that early-stage heat pump startups like HotGreen must compete against for industrial customers.
• GEA Group: Major industrial equipment manufacturer supplying heat exchangers, separators, and refrigeration/heat pump systems for food, beverage, chemical, and pharmaceutical processing. Broad incumbent with overlapping industrial heat technology portfolio and established customer relationships in HotGreen's primary F&B vertical.
• Trane Technologies: Global climate solutions company producing commercial and industrial HVAC, heat pumps, and refrigeration equipment. Broad incumbent with extensive installed base in commercial/industrial heat pump and thermal management categories overlapping with HotGreen's industrial heat pump offering.
• Alfa Laval: Global leader in heat transfer, separation, and fluid handling equipment, including industrial heat exchangers and heat pump components. A broad incumbent that supplies enabling technology to industrial heat markets; HotGreen's manufacturing advisor spent over a decade at Alfa Laval in technology development and scouting.
• MAN Energy Solutions: Global manufacturer of large-scale engines, turbines, and industrial heat/steam systems for power generation and process industries. Broad incumbent with established industrial boiler and steam-generation footprint that HotGreen's heat pumps aim to displace.

Direct peers

• Absolicon: Swedish developer of concentrated solar thermal and industrial heat pump systems for process heat applications. Comparable as a European industrial heat company commercializing high-temperature heat technologies for industrial decarbonization, though focused on solar-thermal hybrid configurations.
• Skyven Technologies: Industrial heat pump developer providing electrified process steam and heat solutions to manufacturing customers. Direct competitor in the industrial high-temperature heat pump category with similar boiler-replacement value proposition and F&B customer focus.
• AIRA: Swedish heat-pump scale-up focused on electrifying heating with proprietary compressor technology. Directly comparable as a venture-backed industrial/domestic heat pump company targeting boiler replacement; notably, HotGreen's manufacturing advisor Anders Nyander is currently Head of Refrigeration and Fluid Dynamics at AIRA.
• AtmosZero: US-based industrial heat pump company decarbonizing industrial steam and process heat with electrified boiler-replacement technology. Directly competes in the same industrial heat pump for low-carbon steam category, targeting food and beverage and other process-heat-intensive manufacturers.

Emerging players

• Rondo Energy: Industrial heat battery company providing zero-carbon process heat to manufacturers as a direct boiler replacement. Adjacent competitor serving the same industrial decarbonization customer with an alternative thermal-storage approach rather than heat pump compression.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds1 record

Investors5 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about HotGreen Solutions