Retrotec DucTester 200 Series Residential Applications - Manual (Page 67)

Page 67 of 91
©Retrotec Inc. 2015
13. Create a Blower Door with a DucTester fan
13.1 Use a DucTester to test tight enclosures
To turn a duct testing system into a Blower Door system for testing tight enclosures, you only need to
add an Aluminum Frame and a Low-Flow Cloth Door Panel. If you have a DucTester system, your
Umbilical will have blue, yellow and green tubes. In this case, the blue tube will be connected to the red
port on the gauge and passed through the panel. The graphic in Figure 51 shows the umbilical that
comes with a Blower Door system, with a red, yellow and green tube, and the red tube connected to the
red gauge port and going through the panel to the outdoors. It is not necessary to change your
Umbilical just for this color change.
Blower Door systems for testing tight enclosures should be set up as shown in Figure 51 below:
Figure 51: Blower Door setup using a Model 200 fan to test tight enclosures. The left image shows the Fan Top from a side
view of the Model 200 fan with tubing and Control Cable connections. Same configuration for the 300 fan.
The green tube is always recommended and MUST be connected if the flow is towards the operator (i.e.,
air is blowing towards where the operator is standing). The Speed Control Cable can be plugged into
either one of the two Control ports.
To measure building envelope leakage with Blower Door testing, please refer to procedures outlined in
Retrotec’s Manual-Blower Door Operation and QuickGuide-Blower Door.