Retrotec DucTester 341 - Manual (Page 3)

Page 3 of 83
©Retrotec Inc. 2014
Copyright © 2014 Retrotec Inc.,
All rights reserved.
This document contains materials protected under International and Federal Copyright Laws. No part of
this book may be reproduced or transmitted in any form or by any means, electronic or mechanical,
including photocopying, recording, or by any information storage and retrieval system without express
written permission from Retrotec Inc.
Retrotec makes no warranties with respect to this documentation and disclaims any implied warranties
of merchantability, quality, or fitness for any particular purpose. The information in this document is
subject to change without notice. Retrotec reserves the right to make revisions to this publication
without obligation to notify any person or entity of any such changes.
DucTester, Infiltrometer, FanTestic are Trademarks of Retrotec Inc. Other trademarks or brand names
mentioned herein are trademarks or registered trademarks of their respective owners.
Table of Contents
Important equipment-related safeguards .......................................................................... 8
Important occupant safeguards during testing ................................................................... 8
1. Why measure Duct Leakage? ...................................................................... 10
1.1 Energy loss ........................................................................................................... 10
1.2 Duct sealing saves money ..................................................................................... 10
1.3 Problems from duct leakage: ................................................................................ 10
2. How much duct leakage is acceptable under existing Codes? ..................... 11
3. Model 300 / 400 System Types: .................................................................. 14
4. Types of Duct Leakage Tests ....................................................................... 15
4.1 What is duct leakage to the outdoors? .................................................................. 15
4.2 What is duct leakage to the indoors? .................................................................... 15
5. Model 341 DucTesters ................................................................................ 17
Models include US341 and EU341 with 10 inch Flex Duct ................................................. 17
5.1 The calibrated DucTester fan ................................................................................ 17
5.1.1. Range Configurations ............................................................................................ 18
5.1.2. Retrotec calibrated fan: Model 300 ...................................................................... 19
5.2 Digital Gauge ........................................................................................................ 20
5.3 Flex Duct .............................................................................................................. 21
5.4 Additional included duct testing components ....................................................... 21
5.4.1. Grill Mask for sealing registers ............................................................................. 21
5.4.2. Umbilical for connecting fan and DM32 gauge .................................................... 21