Gebr. Tuxhorn GmbH & Co. KG

What Gebr. Tuxhorn GmbH & Co. KG does

Gebr. Tuxhorn GmbH & Co. KG is a Bielefeld-based, family-influenced German manufacturer (founded 1919; 13 employees) operating under the tubra® brand as a specialist producer of hydraulic control valves, pump groups, and station modules for solar thermal, heating, and fresh water systems. The technical core rests on a proprietary 3D rotary disc mixer design that delivers constant pressure loss across the control range, integrated GEG-compliant thermal insulation on PGM/PGR pump groups (DN20–DN40), fresh water stations (nemux, FRISTA, therm) operating on demand-flow principles for hygienic potable-water heating, and the eTherm power-to-heat line (P, C, S, AC·THOR 9s) that converts PV surplus electricity into storable heat with continuous 0–9,000W modulation. Two 2026 product launches — the eTherm AC·THOR 9s and the Systemspeicher WP DUO heat-pump storage — extend the portfolio into PV-surplus and heat-pump-adjacent segments, with interoperability established to six external PV energy managers (Fronius, MYPV, SMA, SolarEdge, Solar-Log, Solarwatt) and an SG-Ready heat-pump interface.

The company sells exclusively through specialist plumbing and heating wholesalers in a pure B2B channel; it does not sell directly to installers or end consumers. Target segments are heating installers and contractors, specialist wholesalers (Großhändler), planners/engineers, and OEM boiler and heating-system manufacturers. Revenue mechanics are one-time product sales (valves, pump groups, fresh water stations, storage tanks, power-to-heat stations) plus a 10-year post-discontinuation spare-parts tail. Pricing is structured around B2B trade terms — a €15 minimum-order surcharge below €50 net value, free DDP delivery for domestic orders over €1,000, 30-day net payment with 2% Skonto for 14-day payment — and staggered milestone payments for development services. Marketing concentrates on ISH Frankfurt and EM Power trade shows, downloadable planning/documentation content, and workshops at the Bielefeld HQ; the company is managed by two Geschäftsführer, Stephan Krebs and Michael Filipowsky, and organized as a GmbH & Co. KG.

Name

Gebr. Tuxhorn GmbH & Co. KG

Legal name

Gebr. Tuxhorn GmbH & Co. KG

Website

https://tuxhorn.de

Company type

Private

Founded year

1919

Operating status

Operating

Headcount range

11–50 employees

Short description

Gebr. Tuxhorn GmbH & Co. KG is a German manufacturer of hydraulic control valves, pump groups, and fresh water stations under the tubra® brand, selling exclusively via specialist SHK wholesalers to installers, planners, and OEMs across heating, solar thermal, and power-to-heat applications.

Ownership category

akta.pro rank

Product category

Hydraulic Control Valves & Pump Groups

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)

SIC

Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Heat Exchangers, Coils & Hydronic HVAC Components (IMADANAF)

akta.pro secondary industries

Heat Exchangers & Thermal Transfer Equipment (IMAHAKAC), Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)

Keywords

• Hydraulic control valves
• Pump groups
• Solar thermal stations
• Fresh water stations
• Power-to-heat systems

Headquarters

HQ city

Bielefeld

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Valves and Pump Groups: Manufacture and sale of hydraulic control valves, pump groups, and heating circuit components for solar thermal, heating, and fresh water systems. Products include heating circuit groups (DN20-DN40), boiler circuit groups, and supply valves.
2. Power-to-Heat Systems: Sale of eTherm product line (P, C, S, AC·THOR) for PV surplus utilization. These stations convert excess solar electricity into thermal energy for storage in buffer tanks.
3. Fresh Water and DHW Stations: tubra® fresh water stations (nemux, FRISTA, therm) and domestic hot water preparation systems that operate on a flow-through principle for hygienic hot water supply.
4. System Storage Solutions: All-in-One buffer storage systems, heat pump buffer storage, and fresh water buffer storage optimized for use with Tuxhorn fittings.
5. Spare Parts: Supply of spare parts for existing products. As a manufacturer, the company guarantees spare parts availability for 10 years after product discontinuation.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Gebr. Tuxhorn manufactures and sells valves, pump groups, fresh water stations, solar thermal stations, Power-to-Heat (eTherm) systems, and system storage under the tubra® brand, used for hydraulic control and heat transfer in solar thermal, heating, and drinking-water installations. Products are sold exclusively via specialist plumbing and heating wholesalers to installation companies, planners, and OEMs in Germany and select international markets, with planning documentation, CAD details, and spare parts supported for 10 years after product discontinuation.

Product overview

Gebr. Tuxhorn GmbH & Co. KG is a German manufacturer of valves and pump groups for hydraulic control of solar thermal systems, heating, and fresh water systems. The product portfolio centers on the tubra® brand and includes five main categories: (1) Power-to-Heat solutions under the eTherm sub-brand (P, C, S, and AC·THOR 9s models) for converting PV surplus into heat; (2) Solar thermal products including PGS solar stations and ÜSTA loading stations; (3) Hot water preparation via the tubra®-nemux, FRISTA, therm, and circu-mix fresh water stations; (4) Heating circuit groups (PGM/PGR) with DN20-40 sizes and progressive mixer technology; and (5) System storage solutions (All in One, heat pump buffer, and fresh water buffer). Supporting these are supply valves (safety, pump, fill level, and fuel/gas fittings). The company serves OEMs, wholesalers, installers, and planners across heating, hot water, solar energy, system storage, and supply valve segments.

Differentiator

Problem solved

Functional benefit

Brands

• tubra®: Brand name used for product lines including eTherm (power-to-heat solutions), PGS (solar stations), ÜSTA (solar heat exchangers), nemux (fresh water stations), FRISTA (fresh water stations), and various heating system components.
• tubra®-eTherm
• tubra®-nemux
• tubra®-FRISTA
• tubra®-therm
• tubra®-PGS
• tubra®-ÜSTA
• circu-mix

Products and services

• tubra®-eTherm P Power-to-Heat Station Self-contained hydraulic Power-to-Heat station for photovoltaic systems starting from approximately 4 kWp, providing coordinated excess-current measurement and continuous power modulation for constant target-temperature loading of the buffer storage tank; for installers integrating PV surplus utilization in residential and small-commercial heating systems.
• tubra®-eTherm C Power-to-Heat Station Powerful hydraulic Power-to-Heat station that loads a buffer storage tank to a defined target temperature and is controlled by an external energy management system (Fronius Ohmpilot, MYPV ACThor, SMA Sunny Home Manager, SolarEdge Smart Energy, Solar-Log, Solarwatt) for PV surplus utilization in residential and commercial heating systems.
• tubra®-eTherm S Power-to-Heat Station Self-sufficient plug-and-play Power-to-Heat solution for small storage tanks, with a heating element modulated by an internal controller based on PV surplus; designed for residential installations requiring simple setup.
• tubra®-eTherm AC·THOR 9s Power-to-Heat Station New Power-to-Heat station for PV surplus utilization with continuous modulation control from 0 to 9,000 W, controlled via compatible external energy managers; targets residential and small-commercial eTherm C use cases.
• tubra®-PGS Solar Station Solar station for solar thermal systems, using brass fittings with high-temperature resistance up to 140 °C on the solar flow side; for installers of solar-thermal heating systems.
• tubra®-ÜSTA S/M Solar Loading Station Small/medium-format solar loading station with stratified-charging capability for optimal buffer storage utilization in solar thermal systems; for installation businesses.
• tubra®-ÜSTA L/XL Solar Loading Station Large-format solar loading station with stratified-charging optimization for larger solar thermal installations; for installers of mid-sized and commercial solar thermal systems.
• tubra®-nemux T/TM Fresh Water Station Fresh water station for on-demand hygienic drinking-water heating with high temperature efficiency using the flow-through principle; for residential hot-water preparation.
• tubra®-nemux S/M Fresh Water Station Variant of the nemux fresh water station using a counter-current heat exchanger principle for efficient on-demand hot-water preparation; for installation in residential and small-commercial systems.
• tubra®-FRISTA L/KL Fresh Water Station Fresh water station for larger buildings, featuring legionella protection and efficient heat recovery; intended for installers handling multi-family and small-commercial hot-water systems.
• tubra®-FRISTA XL/KXL Fresh Water Station Extra-large fresh water station for commercial hot-water applications, with cascade capability for multiple units; intended for installers serving larger commercial projects.
• tubra®-therm Fresh Water Station Fresh water station using a plate heat exchanger for efficient on-demand drinking-water heating; for installation businesses serving residential and small-commercial projects.
• circu-mix Circulation Mixing Station Circulation mixing station that maintains defined hot-water temperature in circulation systems, reducing heat loss and ensuring immediate hot-water availability at draw-off points; for installers of hot-water circulation loops.
• tubra®-PGM/PGR Heating Circuit Groups (DN 20/25/32/40) Heating circuit groups (DN20–DN40) with progressive mixer characteristic using the proprietary 3D rotary disc valve, providing constant pressure loss across the control range and GEG-compliant fully enclosing thermal insulation; for installers of residential and commercial heating circuits.
• FSU/FSM Apartment Stations Apartment stations (Wohnungsstationen) for decentralized heating and domestic hot-water supply in multi-family buildings; for installers and planners of apartment heating substations.
• tubra® Feststoffkesselgruppen (Solid-fuel Boiler Groups DN 20/25/32) Solid-fuel boiler groups and return-temperature raising groups (Rücklaufanhebegruppen) in DN20, DN25, and DN32, used to interface solid-fuel boilers with the heating circuit; for installers and planners of biomass/solid-fuel heating systems.
• All-in-One Systemspeicher (Combined Buffer + DHW Storage) Combined buffer-and-DHW storage system in a single unit, integrating buffer storage and hot-water preparation; for installers building compact heat-transfer systems.
• Wärmepumpen-Systemspeicher (Heat Pump Buffer Storage) Buffer storage optimized for heat-pump integration with stratified charging; available as the new WP DUO variant for dual heat-pump integration; for installers of heat-pump heating systems.
• Frischwasser-Pufferspeicher (Fresh-water Buffer Storage) Buffer storage combining drinking-water storage with hydraulic buffer functionality for combined heating and hot-water systems; for installers.
• Sicherheitsarmaturen (Safety Fittings) Safety valves and fittings for supply systems, with DIBT approval for siphon protection; for installers responsible for compliant, safe system installations.
• Pumpenarmaturen (Pump Fittings) Pump valves and fittings for system integration and flow control in heating and supply installations; for installer and OEM use.

Quantifiable outcome

• Power modulation from 0 to 9,000W (eTherm C) for precise PV surplus utilization
• +2 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

Feature5 records

Partnerships

Three partnerships are on record, tiered core and minor.

• Fronius (Ohmpilot)coreTechnology or IntegrationFronius Ohmpilot is an external energy manager that can control eTherm C from 0-9000W in modulating mode for intelligent PV surplus utilization.
• MYPV (ACThor 9S)coreTechnology or IntegrationMYPV ACThor 9S is an external energy manager compatible with eTherm C, providing 0-9000W continuous modulation for PV surplus utilization.
• audatis Services GmbHminorOthersProvider of whistleblower management system (audatis MANAGER) for compliance with whistleblower protection law (HinSchG). Located at Luisenstraße 1, 32052 Herford.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Honeywell: Global controls and HVAC components manufacturer with significant presence in European heating valves, balancing controls, and energy management. Overlaps with Tuxhorn's heating circuit groups and eTherm energy-management ecosystem position, but at vastly larger scale and with broader product breadth.
• Viessmann: Large German heating, heat pump, and HVAC system manufacturer with established installer and wholesaler relationships. Compares to Tuxhorn at the OEM and component level (Tuxhorn components can be specified into Viessmann-style heating systems), but operates as a broad incumbent across the full heating value chain.
• Reflex Winkelmann: German manufacturer of heating system components including expansion vessels, water-side components, and heat pump buffer storage. Comparable to Tuxhorn's Systemspeicher (heat pump and fresh water buffer storage) and supply valve categories, with similar German SHK channel positioning.
• Danfoss: Large Danish manufacturer of heating valves, balancing controls, and HVAC drives with a broad European and global footprint. Overlaps with Tuxhorn's heating circuit groups and solar thermal components, but with significantly wider portfolio, brand pull, and direct relationships with major OEMs and wholesalers.

Direct peers

• my-PV: Austrian specialist manufacturer of Power-to-Heat solutions (AC·THOR product line) for PV surplus utilization. Direct competitor to Tuxhorn's eTherm AC·THOR 9s and eTherm C stations, with overlapping compatibility to Fronius, SMA, SolarEdge, and Solar-Log energy managers.
• Flamco: Dutch manufacturer of heating system components including expansion vessels, air and dirt separators, and hydraulic balancing valves. Directly comparable to Tuxhorn's Versorgungsarmaturen (supply valves) and pump group product range for European heating installers.
• Oventrop: German manufacturer of valves, controls, and heating circuit components for hydraulic balancing in residential and commercial heating systems. Direct comparable to Tuxhorn's PGM/PGR pump groups and heating circuit product line, with the same German SHK trade-channel focus.
• Caleffi: Italian manufacturer of hydraulic components, valves, and stations for heating, solar thermal, and domestic hot water systems. Overlaps directly with Tuxhorn's PGM/PGR pump groups, fresh water stations, and solar stations, with comparable product breadth and B2B distribution via wholesalers.
• IMI Hydronic Engineering: European manufacturer of hydronic balancing valves, control valves, and stations for heating and cooling systems. Comparable to Tuxhorn's 3D rotary disc mixer-based PGM/PGR pump groups and the broader hydraulic control product portfolio.
• Watts Industries: Global manufacturer of plumbing, heating, and water safety valves serving installers and OEMs. Comparable to Tuxhorn in its safety valves, pump valves, and supply fittings offering, with similar distribution through plumbing and heating wholesalers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/Tuxhorn.etherm
• LinkedInlinkedin.com/company/gebr-tuxhorn-gmbh-co-kg

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

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 Gebr. Tuxhorn GmbH & Co. KG