Manufacturer of district heating transfer stations, apartment stations and control technology from 10 kW to 18 MW
aqotec GmbH
Weißenkirchen im Attergau (AT) · Hodonice (CZ) · Riemerling/Ottobrunn (DE) · Colmar (FR) · Radolfzell (DE)New on Amplifa
About aqotec
aqotec GmbH is an Austrian manufacturer of systems for local and district heat supply, based in Weißenkirchen im Attergau. The portfolio includes heat and cooling transfer stations in compact and frame design (aqoClick, aqoFrame), apartment stations (aqoLoft), buffer storage systems, fresh water modules as well as control and visualization systems (aqoSwitch, RM360, aqo360°). The range of services extends from small systems from 10 kW to custom and large systems with capacities up to 18 MW, which are designed, manufactured and integrated into existing or new heating networks on a project-specific basis. Production is carried out as one-off production and small series, among other things from steel (P235GH) and stainless steel (1.4404); pressure piping is welded in accordance with EN ISO 3834-2 and AD 2000-Merkblatt HP 0. In addition to manufacturing, aqotec offers installation, commissioning, remote maintenance, technical service and training. Since 2022, the company has been part of the Viessmann Group with around 130 employees and supplies 15 countries in Europe with sales partners.
- Site
- Weißenkirchen im Attergau
- Processes
- Manufacturing of district heating transfer stations (compact and frame design), project, Component manufacturing for district heating transfer stations (one-off production and small, Welding process 141 (TIG welding), Welding process 311 (oxy-fuel gas welding), Manufacturing of pressure equipment according to AD 2000-Merkblatt HP 0 (PED 2014/68/EU), Control and visualization systems, PLC controls for heating plants, energy centers and, On-site assembly, commissioning, installation and commissioning of local/district heating systems, Technical service, maintenance, remote maintenance, optimization and complaint handling for heating
- Materials
- Pipe material P235GH, Pipe material P(S)235GH, Pipe material stainless steel 1.4404 (V4A), Material group 1.8 (e.g. unalloyed/fine-grained steels) according to EN ISO/TR 15608, Material group 3.1 according to EN ISO/TR 15608 (stainless steels), Stainless steel (brazed joint for heat exchangers), Copper (copper brazed plate heat exchangers, Kelvion), EPP insulation 60 kg/m³
- Certificates
- EN ISO 9001, EN ISO 3834-2:2021 (welding processes), AD 2000-Merkblatt HP 0, EN ISO 3834-2
- Founded
- 1999
- Employees
- 130
- Industries
- Local and district heat supply, Municipal heat supply projects/municipalities, Municipal utilities/energy providers, Residential construction/real estate, Industry, Biomass heating plants
- 01
Project planning and design (engineering)
- 02
Component manufacturing and welding (piping, frames)
- 03
Pre-assembly and electrical wiring of stations
- 04
Factory testing
- 05
Installation and commissioning
- 06
Control, visualization, remote maintenance and service
Materials and Processes
Steel P235GH
Hot-rolled pipe material for district heating transfer stations, e.g. in the aqoFrame ECO design.
Steel P(S)235GH
Pressure pipe material for compact stations of the aqoClick series.
Stainless steel 1.4404 (V4A)
Corrosion-resistant pipe material for apartment stations such as aqoLoft ECO.
Material group 1.8 according to EN ISO/TR 15608
Unalloyed and fine-grained steels for welded pressure piping.
Material group 3.1 according to EN ISO/TR 15608
Stainless steels for welded components.
Stainless steel brazed plate heat exchangers
Brazed joint for heat exchangers in transfer stations.
Copper brazed plate heat exchangers
Copper brazed heat exchangers (Kelvion) in aqoLoft Classicline and Highline.
EPP insulation 60 kg/m³
Thermal insulation for compact stations of the aqoClick series.
Armaflex XG
Flexible insulation for apartment stations such as aqoLoft ECO.
Sites
Weißenkirchen im Attergau
ATHeadquarter, Production and Office
- Lot size
- One-off production and small series
- Materials
- Steel (P235GH, P(S)235GH), stainless steel (1.4404), copper
- Wago PFC200-8215 PLC control with 750-series I/O modules (aqoSwitch)
- Vacon frequency inverters for fixed-speed pumps
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacturing of district heating transfer stations (compact and frame design), projectAssembly | – | – | – | – | P235GH, P(S)235GH, Stainless steel, Copper (brazed heat exchangers) |
| Component manufacturing for district heating transfer stations (one-off production and smallJoining | – | ≤ 6 m | ≤ 10 t | Small series | Material group 1.8 and 3.1 according to EN ISO/TR 15608 |
| Welding process 141 (TIG welding)Joining | – | ≤ 6 m | ≤ 10 t | – | Material group 1.8, 1.4, 3.1 according to EN ISO/TR 15608 |
| Welding process 311 (oxy-fuel gas welding)Joining | – | ≤ 6 m | ≤ 10 t | – | Material group 1.8 according to EN ISO/TR 15608 |
| Manufacturing of pressure equipment according to AD 2000-Merkblatt HP 0 (PED 2014/68/EU)Joining | – | – | – | – | Steel for pressure equipment |
| Control and visualization systems, PLC controls for heating plants, energy centers andEngineering | – | – | – | – | – |
| On-site assembly, commissioning, installation and commissioning of local/district heating systemsAssembly | – | – | – | – | – |
| Technical service, maintenance, remote maintenance, optimization and complaint handling for heatingTesting | – | – | – | – | – |
2 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Wago PFC200-8215 PLC control with 750-series I/O modules (used in | WAGO PFC200-8215 (750-series I/O) | – | – | – | Weißenkirchen im Attergau / on-site systems |
| Vacon frequency inverter (in aqoSwitch custom system control for fixed-speed pumps) | Vacon | – | – | – | – |
Additional services
Reference customers
Quality and Certification
aqotec is certified according to EN ISO 9001 (TÜV Austria) and manufactures pressure piping according to EN ISO 3834-2 as well as AD 2000-Merkblatt HP 0 (TÜV SÜD). Transfer stations are delivered pre-assembled and factory-tested.
| Evidence | Weißenkirchen im Attergau |
|---|---|
| EN ISO 9001 | |
| EN ISO 3834-2 | |
| AD 2000-Merkblatt HP 0 |
Company History
- 1999
Foundation as a district heating competence center
- 2006
Introduction of EN-ISO 9001:2008 quality management system
- 2009
Expansion of production and office
- 2010
Market launch of the aqoClick compact station
- 2012
Establishment of production facility in Hodonice (CZ)
- 2014
Market launch of the aqoLoft apartment station
- 2016
Market launch of the aqo360° visualization system
- 2018
Market launch of the RM360 district heating controller
- 2022
Strategic partnership with Viessmann; aqotec becomes part of the Viessmann Group
- 2024
Market launch of the aqoNPS D and aqoNPS S buffer storage systems
- 2025
District heating system with surplus feed-in receives European patent (EP 4230919)
- 2026
Expansion of the management board: Stefan Bergmair is granted power of attorney (Prokura)