Retrotec Blower Door - Manual (Page 22)

Page 22 of 87
©Retrotec Inc. 2015
The Model 200 blower
door system has the 0.25
HP 200 fan, which can
move between 7 and 725
CFM. It is the
predecessor of the Model
300.
The Model 300 is ideal for
testing tight houses as large
as a 1600 square feet of
floor area that leak as
much as 3 Air changes per
Hour.
If using a 200 fan and a DM32 gauge, you must choose the device called 200 on the Retrotec Blower Doors screen of
the gauge so that the correct n value is used in the calculation of @Pressure in the gauge.
The Retrotec 300 fan is recommended for testing tight enclosures. The 300 fan is not available on the DM-2 gauge.
On the DM32 gauge, you must choose the device called 300 on the Retrotec Blower Doors screen so that the correct
n value is used in the calculation of @Pressure in the gauge.
The hookup can be the same as the Model 1000 as long as the fan is blowing away from the operator as it would be
for depressurizing from inside the enclosure. When the fan is blowing Towards the operator, the green port
between the fan and gauge MUST also be connected to reference the fan properly otherwise the flow will read
extremely high. To avoid any issues, it is recommended that both the yellow and green tubes are connected at all
times between the gauge and the fan. Door Fan systems for testing tight enclosures should be set up as shown in
Figure 14 below.