Fan Calibration Variable Calculator

The ATTMA Trade Association has developed the following Fan Calibration Variable tool to calculate fan calibration variables, particularly useful for new Retrotec Fans which use Polynomial variables.

 

Fan Calibration Variable Calculator

Enter appropriate numbers and units from your calibration certificate and the unit of measure you wish the calibration variables to be displayed for entry into your air tightness testing software. For the vast majority of fans leave the Polynomial check box unticked as this is specifically for the B4 and smaller range plates on the Retrotec 5000 and 6000 series fans.

No. of Rings/Ranges No. Readings Volume Flow Rate
Certificate Software




This tool has been designed for use when the calibration variables have not been provided by your calibration laboratory. An assumed air density of 1.2kg/m3 has been used within the calculator. ATTMA takes no responsibility for errors.

Quick Links

About ATTMA
ATTMA Lodgement
ATTMA Tools
Certification Schemes
Air Tightness Members
Ventilation Members

Careers

Work with Us
Industry Vacancies

Policies

Impartiality Statement
GDPR Data Management
Data Policy
Whistleblowing
Complaints Procedure
External Vacancy & Advertising Policy

ATTMA are committed to running impartial schemes. Our impartiality statement, GDPR data management, data, whistleblowing can be accessed using the links above. This also include ATTMA’s full complaints procedure if you are not happy with ATTMA’s service. 

Contact Us

The Air Tightness Testing & Measurement Association

Head Office
Unit 3 Tannery Road Industrial Estate
Tannery Road
High Wycombe
Buckinghamshire
HP13 7EQ

Northern Office
Park House
24 Park Square W
Leeds
LS1 2PW

+44 (0)1494 358 159
admin@bcta.group

Copyright © 2024 ATTMA All rights reserved