
German manufacturer of dehumidifiers, humidification systems and water treatment plants for industry and waterworks since 1952.

STIELOW GmbH Maschinen- und Apparatebau
Frankfurt am Main (Headquarters) · Beselich-Obertiefenbach (Limburg Plant)New on Amplifa
About STIELOW
STIELOW GmbH Maschinen- und Apparatebau, based in Frankfurt am Main, has specialised in dehumidification, air humidification and water treatment since 1952 and is regarded as the first German machine factory for portable dehumidifiers. The product range comprises 40 models in over 300 equipment variants, including room dehumidifiers of the AIRDRY brand, construction dryers and industrial dehumidifiers of the HANDYDRY brand as well as JET humidification systems with diamond nozzle technology and water treatment plants. Research, development and design are carried out entirely in-house; production is done by hand with a high level of vertical integration at the Beselich-Obertiefenbach site (Limburg plant). Hot-dip galvanised sheet metal, Zinkor and aluminium sheets, stainless steel V2A as well as heat exchangers made of high-quality copper alloys are used. A special design department develops customised solutions, among other things with nozzles from the special fabrication programme. The products are manufactured in Germany and sold worldwide; spare parts are available for all JET products ever produced.
- Site
- Frankfurt am Main
- Processes
- Special construction / special fabrication of dehumidifiers (nozzles, special fabrication programme), Sheet metal working / Forming ('We put sheet metal into shape'), Painting / chemical pretreatment and priming of sheets, Machining centre (switching and control), Research, development and design in-house, Special construction department for customised dehumidifiers, On-site service, Spare parts for all JET products ever produced
- Materials
- Stainless steel V2A, Copper alloys (heat exchangers), Aluminium (aluframe-tec-composite), Sheet steel, hot-dip galvanised sheets, Titanium nozzles (reference in comparison text), Copper alloys, Hot-dip galvanised sheets, Zinkor sheets
- Founded
- 1952
- Industries
- Waterworks/Water supply, Construction/Building protection, Water damage restoration, Automotive/Classic car collections and museums, Call centres/Office buildings, Genetic engineering
- 01
Research & Development
- 02
Design
- 03
Sheet metal working / Forming
- 04
Chemical Pretreatment & Painting
- 05
Machining (Machining Centre)
- 06
Assembly
- 07
Special Construction / Nozzle Special Fabrication
- 08
On-site Service & Spare Parts
Materials & Processes
Stainless steel V2A
Device housings in V2A version, optionally available for particularly demanding environments.
Copper alloys
Heat exchangers (evaporators and condensers) with increased wall thicknesses specially for the refrigeration industry.
Aluminium (aluframe-tec-composite)
Standard device construction with 67 % weight reduction compared with sheet steel construction.
Sheet steel
Alternative housing version on request, painted with GLASURIT high-solid paints.
Hot-dip galvanised sheets, Zinkor sheets
Hot-dip galvanised sheets and Zinkor sheets used in device construction for corrosion-protected assemblies.
Diamond nozzles (alternatively steel and titanium nozzles)
High-pressure nozzles for air humidification with an extremely long service life and a flawless droplet spectrum.
Sites
Frankfurt am Main
DEHeadquarters (STIELOW House Westendplatz)
Beselich-Obertiefenbach
DELimburg Plant – Dehumidification Division
- Materials
- Sheet steel, hot-dip galvanised sheets, Zinkor sheets, aluminium sheets, stainless steel V2A, copper alloys
- Machining centre
Products & Components









Inside the production






Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Special construction / special fabrication of dehumidifiers (nozzles, special fabrication programme)Engineering | – | – | – | – | Steel, Titanium, Aluminium, Stainless steel (V2A), Copper alloys |
| Sheet metal working / Forming ('We put sheet metal into shape')Forming | – | – | – | – | Sheet steel, Aluminium sheet, hot-dip galvanised sheets, Zinkor sheets |
| Painting / chemical pretreatment and priming of sheetsSurface | – | – | – | – | Sheet steel, Aluminium sheet |
| Machining centre (switching and control)Machining | – | – | – | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Machining centre | – | – | – | – | Beselich-Obertiefenbach plant (assumed) |
Additional services
Reference customers
History since 1952
- 1952
First dehumidifier Type T 8 delivered; founding year of STIELOW GmbH.
- 1953
Intensive advertising campaign combines logo and product.
- 1954
Dehumidifiers in four types; references from waterworks and a wide variety of sectors.
- 1957
ELEKTRO-ENTFEUCHTER T 200 – at that time the most powerful series-production dehumidifier with three fans.
- 1964
Type series 70 with eight models presented at the Hanover Fair.
- 1972
EB 1 Automat – the world's first integrated dehumidification and humidification unit, presented at the Hanover Fair.
- 1977
25 years of dehumidification in waterworks; market share of over 60 % in Germany.
- 1984
Room dehumidifier 2000 ELECTRONIC with stored-programmable control; design award from the Designer Center Stuttgart.
- 1987
Introduction of the ECO device platform for all fields of application.
- 1998
Trademarks AIRDRY registered at the Patent Office.
- 1999
Trademark HANDY-DRY registered at the Patent Office.
- 2004
Dehumidifier programme comprises 25 devices.
- 2006
Introduction of alu-frame-tec.
- 2023
Programme comprises 40 models with over 300 equipment variants (complete catalogue edition 71-72).