AHUiQ sizing program

AHUiQ revolutionizes the dimensioning of air handling units!

With the AHUiQ sizing program, you will find the best solution for your site in a wide range of Finnish Recair air handling units. The program combines ease of use, familiar solutions already proven to be good, and completely new functions to implement ventilation dimensioning efficiently and reliably.

Design and dimension the best alternative for a site from a wide range of Finnish compact and modular Recair air handling units.


AHUiQ is a Windows application developed specifically for ventilation designers. The application provides real-time dimensioning data, which ensures that the latest version of the program is always in use. Installation does not require your company’s IT support/administrator access. 

  • SFP calculation – Project-level SFP (Specific Fan Power) calculation, where you can add units from outside AHUiQ and take an Excel export according to the SFP guide. Real time project SFP reflecting all the changes to the units. ​
  • Excel exports – Versatile and different Excel exports facilitate easy data gathering and comparison for equipment and units selected.  ​
  • Wide portfolio of units – A large selection of modular units and an expanding compact range allow the use of the same program regardless of the needs in the project. ​
  • Multiple calculation points – Units can be calculated for partial loads or boost situations with the same components. Making reserve calculations or reviewing partial load performance have never been easier. ​
  • Rotor leakage inspection – Comprehensive rotor leakage calculation enables the management of leakages and balanced sizing of machines.
  • Functional diagrams – Clear and ready-to-use functional diagrams in PDF or DWG format directly from the Program. ​
  • Glycol heat exchanger with multiple coils – You can calculate multiple supply and exhaust units with glycol heat recovery as one heat recovery circuit.​
Try out our sizing program and give feedback! We are constantly developing it to meet the needs of designers.

For more information contact our specialist

Aleksi Kähärä

Development Manager, Recair air handling units