What Rosenberg Ventilatoren does

Rosenberg Ventilatoren GmbH is a German manufacturer of controllable external rotor motors (AC and EC), ventilation fans, and air handling units, founded in 1981 in Künzelsau and now operating under the Karl Rosenberg Foundation following a 2022-2023 ownership transition. The company runs three production sites — Künzelsau (motors and fans), Glaubitz (air handling units), and Shanghai (AC motors and fans for China) — and sells through owned subsidiaries and distributors in more than 45 countries. Its product portfolio spans OEM components (refrigeration axial fans, radial fans, free-running impellers, fan modules), ventilation products (duct, box, axial, roof fans, air curtains, kitchen exhaust boxes), air handling units (Airbox F40/S60/T60 and the SupraBox energy recovery line), and retrofit solutions (ECFanGrid fan walls, heat-recovery retrofits), supported by selection and configuration software (RoVent10, ECParam, SupraBox SELECT).

The core technology is the in-house development and production of EC and AC external rotor motors with integrated control electronics, including motor casting at a captive foundry in Medzev, Slovakia. This vertical integration enables supplier-independent manufacturing, flexible customization, and certified performance under AMCA (ISO 5801, ISO 13347-3), Eurovent, DIN EN ISO 9001:2015, DIN EN 15085-2 (rail), ATEX, and RLT-Directive 01. The firm addresses three primary use cases: building HVAC (offices, retail, hospitality), industrial process and room air, and OEM integration, with custom-quoted pricing and a direct enterprise field-sales motion supplemented by technical and commercial service teams for installation, commissioning, maintenance, and retrofit.

Revenue mechanics are dominated by hardware sales of motors, fans, and air handling units, complemented by professional services for installation, commissioning, maintenance, and retrofit. Recent commercial momentum is visible in the 2025-2026 product cadence — SupraBox MODULAR, SupraBox COMFORT H, EC Duct Fan KHAG(S), Clever PRO CONTROL, and the AKV axial fan series — and in targeted verticals such as rail ventilation, positioning Rosenberg for tightening EU ErP 2024/1834 efficiency standards effective July 2026.

Name

Rosenberg Ventilatoren

Legal name

Rosenberg Ventilatoren GmbH

Website

https://rosenberg-gmbh.com

Company type

Private

Founded year

1981

Operating status

Operating

Headcount range

51–100 employees

Short description

Rosenberg Ventilatoren GmbH manufactures EC and AC external rotor motors, fans, and air handling units in Germany, serving building HVAC, industrial process air, and OEM customers through subsidiaries and distributors in 45+ countries.

Ownership category

akta.pro rank

Product category

Industrial Ventilation Equipment

NAICS

Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413), 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)

SIC

Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Refrigeration & Service Industry Machinery (3580)

akta.pro primary industry

Fans, Blowers & Ventilation Units (Supply/Exhaust/Inline) (IMADANAB)

akta.pro secondary industries

Ventilation, Ducting & Air Distribution Equipment (IMAHAKAG), Ventilation System Installation & Repair (Bath/Kitchen Fans, ERV/HRV) (HSAOAIAF)

Keywords

• Industrial ventilation fans
• Air handling units
• EC external rotor motors
• HVAC air movement
• OEM fan manufacturing

Headquarters

HQ city

Künzelsau

HQ country

Germany

HQ region

Europe

Offices18 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Sales - Fans and Motors: Sale of controllable external rotor motors, ventilation fans, axial fans, duct fans, box fans, roof fans, and free-running impellers. Products manufactured in-house from motor to finished fan.
2. Air Handling Units: Sale of box-style air handling units (Airbox series) and compact energy recovery units (SupraBox series) for building HVAC and industrial applications.
3. Professional Services: Installation, commissioning, maintenance, repair, and retrofit services for fans and air handling units. Technical customer service and support.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Rosenberg Ventilatoren GmbH manufactures and globally distributes controllable external rotor motors (AC and EC), a full range of ventilation fans (axial, radial, duct, box, roof), door air curtains, box-type air handling units, and compact energy recovery units for building HVAC, industrial process air, and OEM integration. Production is vertically integrated from in-house motor winding and foundry through to finished fans and air handling units with controls, supported by technical service for installation, maintenance and retrofit.

Product overview

Rosenberg Ventilatoren GmbH is a manufacturer of controllable external rotor motors, fans, and air handling units. The product portfolio is organized into four main divisions: OEM Products (refrigeration axial fans, radial fans, free-running wheels, fan installation modules for original equipment manufacturers), Ventilation Products (duct fans, box fans, axial fans, kitchen exhaust boxes, roof fans, air curtains, compact ventilation units, and control devices), Air Handling Products (Airbox F40, S60, T60 box climate units and Airtronic control systems), and Retrofit Solutions (ECFanGrid fan wall for efficient fan replacement and heat recovery retrofitting). The company also offers software tools including RoVent10 fan selection software, ECParam configuration software, and SupraBox SELECT online configuration tool. The entire product range from motors to controls is mainly manufactured in Rosenberg's own production facilities, enabling independent control over quality and flexible customer solutions.

Differentiator

Problem solved

Functional benefit

Brands

• ECOFIT: Fan manufacturer, acquired by Rosenberg in 1994
• ETRI
• Airtecnics
• Rox Klimatechnik GmbH
• ECFanGrid
• RoVent10
• SupraBox
• Airbox

Products and services

• OEM Products OEM product line including refrigeration axial fans, radial fans, free-running wheels and fan installation modules for integration into OEM customers' equipment such as refrigeration and industrial machinery.
• Ventilation Products Complete ventilation product line covering duct fans, box fans, axial fans, kitchen exhaust boxes, roof fans, door air curtains, compact ventilation units and control/regulation devices for TGA (building services) applications.
• Air Handling Products (Airbox series) Box-style air handling units including Airbox F40, Airbox S60 and Airbox T60 models with Airtronic control systems for climate and ventilation applications.
• Retrofit Solutions Retrofit solutions including the ECFanGrid fan wall for energy-efficient fan replacement in existing installations and heat recovery retrofitting of legacy ventilation units.
• Axial Fan Series AKV New axial fan series with five plastic blades designed for energy-efficient ventilation applications, with size 860 as the first released variant.
• EC Duct Fan KHAG(S) EC duct fan series combining optimized flow with an innovative sound insulation concept to deliver high performance and energy efficiency at improved acoustic levels.
• Clever PRO CONTROL Intelligent control system for air curtains that automatically adjusts to ambient conditions, features infrared remote control, LCD display, Modbus building automation integration, integrated temperature sensor and boost mode for door opening regulation.
• SupraBox COMFORT H Compact energy recovery unit with horizontal connections, robust housing, integrated slot for heating registers and heat recovery efficiency exceeding 90%.
• SupraBox MODULAR Modular compact energy recovery ventilation unit offered in five sizes enabling air flow rates up to 11,000 m³/h, with EC fans up to IE5 efficiency and SFP1 specific fan power.
• SupraBox SELECT Online configuration and selection software for the SupraBox COMFORT compact energy recovery unit, enabling customers to size and configure units to their individual operating points.
• Installation, Commissioning, Maintenance, Repair and Retrofit Services Technical and commercial services covering installation, commissioning, maintenance, repair and retrofit of Rosenberg fans and air handling units, delivered through the company's direct service and subsidiary teams.

Quantifiable outcome

• Heat recovery efficiency exceeding 90% in SupraBox COMFORT units
• +2 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature6 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Rox Klimatechnik GmbHcoreOthers · 1 January 2006Acquired company specializing in central room air technology, industrial process air technology, and purification of contaminated exhaust air. Operates as independent partner from Weitefeld, Germany.
• ETRIcoreOthers · 1 January 2002French fan manufacturer acquired via ECOFIT subsidiary. American ETRI Inc. became Rosenberg USA Inc. in Charlotte, expanding US market presence.
• ECOFITcoreOthersFrench fan manufacturer acquired by Rosenberg, now operating as Rosenberg Vendôme. Enables portfolio expansion in smaller fan sizes and strengthens OEM manufacturer position.
• AirtecnicsminorOthersBrand group company under Rosenberg Group umbrella, specializing in air handling and ventilation products.
• TEKNORminorOthersBrand group company under Rosenberg Group umbrella.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• ebm-papst: German-headquartered global market leader in fans and motors with in-house EC motor development. Directly comparable to Rosenberg in external rotor motors, axial/centrifugal fans, and air handling units, and competes head-to-head in HVAC, refrigeration, and industrial OEM applications.
• Ziehl-Abegg: German manufacturer of electric motors, fans, and air-handling equipment with strong EC motor technology. Closely comparable to Rosenberg in target segments (HVAC, refrigeration OEM, industrial ventilation) and technology positioning.
• Systemair: Swedish-listed ventilation company with a broad fan and air handling unit portfolio and global subsidiary network across 50+ countries. Comparable to Rosenberg in product range (fans, AHUs), multi-country distribution model, and end-market focus on building HVAC.
• FläktGroup: European manufacturer of air movement and air handling solutions for commercial, industrial, and infrastructure applications. Closely comparable in air handling units, fans, and retrofit/upgrade offerings targeting similar building HVAC and industrial customers.
• Greenheck Group: US-based manufacturer of commercial and industrial ventilation equipment (fans, AHUs, dampers, louvers). Comparable to Rosenberg in centrifugal/axial fans and air handling unit manufacturing, particularly in commercial building HVAC.
• Soler & Palau: Spanish-headquartered ventilation manufacturer with global presence in 90+ countries. Directly comparable product portfolio (axial fans, centrifugal fans, AHUs, controls) and similar focus on energy-efficient EC-based systems.
• Nicotra Gebhardt: Italian manufacturer of fans, blowers, and air handling units serving HVAC and industrial markets. Comparable product mix and European OEM/building customer base to Rosenberg.
• Maico: German fan and ventilation specialist with comparable focus on axial/centrifugal fans, box fans, and air handling units for building services. Direct competitor in the German-speaking market for duct fans and roof fans.

Broad incumbents

• TROX: German global leader in indoor air quality and ventilation components with a very broad portfolio (dampers, diffusers, AHUs, fans). Comparable to Rosenberg in building HVAC air handling, but operates at materially larger scale and a wider product scope.
• WOLF GmbH: German heating, ventilation, and air conditioning manufacturer with broad system offerings for residential and commercial buildings. Overlaps with Rosenberg in ventilation/AHU but competes more on complete HVAC system integration rather than component fans/motors.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/rosenberggruppe
• LinkedInlinkedin.com/company/rosenberg-ventilatoren-gmbh
• Instagraminstagram.com/rosenberg_ventilatoren_gmbh

Compliance10 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries26 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 Rosenberg Ventilatoren