Engineering consultancy for building services planning under HOAI, from preliminary planning through to project support

Wieg Ingenieure GmbH & Co.KG
Duderstadt (Headquarters) · GöttingenNew on Amplifa
About Wieg Ingenieure
Wieg Ingenieure is an independent, product- and manufacturer-neutral engineering consultancy headquartered in Duderstadt with a branch office in Göttingen. The company accompanies construction projects in building services (TGA) across all HOAI service phases – from fundamental analysis and preliminary planning through design and approval planning, execution planning, tendering and awarding to site supervision and project support. The service spectrum covers media technology such as compressed air, vacuum and production gas systems, sanitary and fire protection solutions, energy, refrigeration and heating technology including combined heat and power (CHP) units and district heating networks, electrical and building control technology, room and process air with cleanroom technology as well as renewable energy systems such as fuel cell installations and solar systems. In addition, the consultancy offers 3D digitalisation with 3D scanning, BIM model creation, point clouds and drone photography. Clients come mainly from industry and commerce, including Robert Bosch, Buderus, ZF-LS and Otto Bock Healthcare.
- Site
- Duderstadt
- Processes
- General & individual planning of building services under HOAI (service phases 1–9), Planning of media technology (compressed air generation and compressed air networks, vacuum, Planning of sanitary & fire protection solutions (water supply and wastewater systems, fire, Planning of energy, refrigeration & heating technology (heat generators and heat pumps, combined, Planning of electrical & building control technology (transformer substations, low- and, Planning of room & process air (ventilation of office and production buildings, air conditioning, Planning of renewable energy systems (fuel cell production rooms and technical installations,, TGA services (creation of as-built plans, TGA calculations, recording and
- Materials
- Building Services (TGA), Media Technology, Energy, Refrigeration & Heating Technology, Electrical & Building Control Technology, Room & Process Air, 3D Digitalisation
- Certificates
- Site supervision (quality, deadlines, acceptances)
- Founded
- 1994
- Industries
- Industry, Commercial, Energy technology, Healthcare
- 01
Fundamental analysis and existing-condition assessment
- 02
Preliminary planning with cost and decision-making bases
- 03
Design and approval planning
- 04
Execution planning
- 05
Tendering and awarding
- 06
Site supervision
- 07
Project support
Service Areas and Planning Fields
Building Services (TGA)
Planning of all TGA trades under HOAI across service phases 1–9.
Media Technology
Planning of compressed air, vacuum and production gas systems, water treatment and cold/hot water networks.
Energy, Refrigeration & Heating Technology
Planning of heat generators, CHP units, district heating networks, process heat, heat recovery and refrigeration networks.
Electrical & Building Control Technology
Planning of transformer substations, voltage distributions, measurement and control technology (MSR) and fire alarm systems.
Room & Process Air
Planning of ventilation, air conditioning and cleanroom technology as well as process exhaust air with heat recovery.
3D Digitalisation
3D scanning, point clouds, BIM model creation and building visualisation of existing buildings and installations.
Locations
Duderstadt
DEHeadquarters
- Materials
- TGA planning, media technology, fire protection, energy and refrigeration technology
Göttingen
DEBranch office
- Materials
- TGA planning
Inside the production

Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| General & individual planning of building services under HOAI (service phases 1–9)Engineering | – | – | – | – | – |
| Planning of media technology (compressed air generation and compressed air networks, vacuumEngineering | – | – | – | – | – |
| Planning of sanitary & fire protection solutions (water supply and wastewater systems, fireEngineering | – | – | – | – | – |
| Planning of energy, refrigeration & heating technology (heat generators and heat pumps, combinedEngineering | – | – | – | – | – |
| Planning of electrical & building control technology (transformer substations, low- andEngineering | – | – | – | – | – |
| Planning of room & process air (ventilation of office and production buildings, air conditioningEngineering | – | – | – | – | – |
| Planning of renewable energy systems (fuel cell production rooms and technical installations,Engineering | – | – | – | – | – |
| TGA services (creation of as-built plans, TGA calculations, recording andEngineering | – | – | – | – | – |
| 3D digitalisation (3D scanning of existing buildings and technical installations, point cloud andEngineering | – | – | – | – | – |
| Site supervision (quality, deadlines, acceptances, defect identification and tracking)Engineering | – | – | – | – | – |
| Project support (defect assessment and remediation within the warranty periods)Engineering | – | – | – | – | – |
Additional services
Reference customers
Planning Quality
Site supervision includes monitoring quality, deadlines, acceptance testing as well as identifying and tracking defects; during project support, defect remediation within the warranty periods is accompanied.
| Evidence | Duderstadt |
|---|---|
| Site supervision (quality, deadlines, acceptances) |
History
- 1994
Founding of a GbR in Breitenworbis
- 1996
Founding of the Wieg engineering consultancy in Birkungen
- 2000–2014
Expansion with locations in Duderstadt, Nuremberg and Göttingen
- 2017
Founding of Wieg Ingenieure GmbH & Co.KG
- 2021
Closure of the Nuremberg location
- 2025
Founding of Wieg Ingenieur GmbH