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The REHAU calculation software RAUCAD offers a professional, AutoCAD-based CAD program for the design, dimensioning and invitations to tender. RAUCAD enables simple drawing, calculation and dimensioning of 2D and 3D pipe networks for the fields of heating, drinking water, drainage water and stormwater.

The software's integrated assistant contains all required functions. With the integrated layout generator, pipe networks can be created and calculated in a standard-compliant manner with just a few clicks. The user is guided through the design process step-by-step by the easy-to-use program.

RAUCAD 17 is now available


RAUCAD is a modular design software whose modules, including the additionally available modules, are compatible with each other and have a uniform operation.

Includes a U-value calculation with extensive building material table as well as master data with specific heating and cooling load calculation:

  • DIN TS to EN 12831-1 2019 (Germany)
  • Dutch ISSO 51 for EN 12831-1 2019 (Netherlands)
  • ÖNORM H 7500 to EN 12831 (Austria)
  • SN SIA 384.201 to EN 12831 (Switzerland)
  • TS 2164 (Turkey)
  • NF P 52 - 612 / CN to EN 12831 (France)

With the new assistant-guided building manager, you can enter the complete building directly in the CAD system in just a few steps. Functions include the drawing of walls, windows and doors as well as the direct generation of the 3D building model. This 3D building model is transferred to RAUWIN and the heating load calculated automatically. Calculated radiator systems and underfloor heating/cooling systems are automatically drawn into the CAD plan.

  • Assistant-guided
  • Management of all floors in one drawing
  • Multiple adjacent floor plans also possible
  • Automatic generation of 3D model
  • Navigation in the drawing
  • Import of images, dwg and pdf files
  • Drawing of sloping ceilings and correct calculation of the heating and cooling loads
  • Updates the RAUWIN project when plans are changed in CAD

Includes the design of the panel heating system according to DIN EN 1264 / EN 15377.

  • Graphic and tabular layout of the panel heating
  • Quick design of the surface heating/cooling or on the basis of the previously created heating load calculation
  • Variable system design for surface heating/cooling
  • Hydraulic adjustment automatically with any design, whether for panel heating/cooling or also in radiator design
  • Radiator design including VDI 3805 interface for reading manufacturer-specific product data

In the field of pipe system calculation, REHAU offers a CAD-based tool for drawing and calculating pipe systems. An assistant guides you through the design process step by step. With the layout generator, you can draw complete piping diagrams in just a few steps.

  • Pipe system calculation for 2-pipe systems and Tichelmann
  • Includes hydraulic balancing of the system, also with multiple rule levels
  • Calculation with various system temperatures, incl. mixers
  • Hydraulic assistant for circuits in the heating pipe network
  • Freely definable medium table, e.g. for calculation with water-glycol mixture
  • VDI 3805 interface for valve data
  • Residential and decentralized drinking water station
  • Dimensioning of the pump with manufacturer data

In the field of pipe system calculation, REHAU offers a CAD-based tool for drawing and calculating pipe systems. An assistant guides you through the design process step by step. With the layout generator, you can draw complete piping diagrams in just a few steps.

  • Drinking water network calculation in accordance with DIN 1988-300 / DIN EN 806-3
  • Drinking water network calculation in accordance with SVGW W3 (Switzerland)
  • Circulation calculation in accordance with DVGW worksheets W551 and W553
  • Hydraulic balancing across multiple levels
  • Calculation of multiple hot water heater in a pipe system
  • REHAU Zeta values
  • Calculation of discharge times in accordance with DIN 1988-200 or Schöneberg ruling (102 C 55/94)

In the field of pipe system calculation, REHAU offers a CAD-based tool for drawing and calculating pipe systems. An assistant guides you through the design process step by step. With the layout generator, you can draw complete piping diagrams in just a few steps.

  • Drainage pipe networks in accordance with DIN EN 12056 / DIN 1986-100
  • Rainwater drainage incl. rainfall intensity table of 90 locations
  • Data import via KOSTRA-DWD

As an alternative to the widely used AutoCAD full version, we offer you CADinside. All important functions from Autodesk AutoCAD are also a part of CADinside. The benefit for you: CADinside is not subject to an annual license fee like an AutoCAD full version.

The following additional modules are available optionally or in addition.

Cooling load calculation

With just a few entries, you can obtain the cooling load results for a building with calculated heating load in accordance with VDI 2078, making this add-on module a powerful addition to RAUWIN Profi.

  • Dynamic cooling load calculation according to VDI 2078
  • Room/component transfer from heating load calculation or EnEV

Home ventilation

Design of the residential ventilation concept according to DIN 1946-6.


With just a few entries you will receive the results according to EnEV for a building with calculated heating load. Here you create consumption or demand statements. This additional module is therefore a powerful addition to RAUWIN Profi. The room/component is taken over from the heating load/cooling load calculation.

The software is multilingual, which means that you choose the material assortment for a country (region), the interface language for operation and the printout language. This enables you to design an international construction project in accordance with the language requirements.

The following languages are available for operation and printouts:

  • German
  • English
  • French
  • Russian
  • Italian
  • Dutch
  • Turkish


REHAU provides competent and professional support before, during and after your purchase of the software. Each new licence includes free participation in the RAUWIN seminar.

Even after the training, you will receive the support you require. An expert team is at your disposal by phone or email to provide assistance with any questions you may have about our design software. Extensive support services are available free of charge to all software customers after the training course:

System requirements

The REHAU design software is delivered on a USB stick containing the entire RAUCAD installation package.

With new licences, a program protection adapter (dongle) is supplied in addition, which must be connected with your computer in order to use the software.

  • Operating systems: Windows 7, 8 and 10 (64-bit)
  • AutoCAD compatibility: As an alternative to the RAUCAD CAD-platform, AutoCAD 2019-2022 can be used as the CAD-Platform.

Software maintenance

The software maintenance contract ensures that the software is up-to-date and corresponds to the current standards in terms of technology. The plannable annual costs associated with a maintenance contract prevent the high update costs that can otherwise occur with individual updates after some years.

The software maintenance is based on purchased licences, whether as new purchases or updates. RAUCAD software maintenance includes:

  • Use of the RAUCAD Hotline
  • Operability under current Windows operating systems
  • Adjustment of operability on the respective current AutoCAD versions
  • Update of CADinside
  • Update of the calculation software if the standards and rules of the underlying technology change


Use our video tutorials to get an insight into how the software works and to learn the basics of how to use the software.


Download Installation Center.

Download RAUCAD

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