Retrotec FanTestic (ATTMA) - Manual (Page 19)

rev-2014-10-27
Page 19 of 58
©Retrotec Inc. 2011-2014
This value is used to calculate any result that requires volume, such as air changes per hour.
If you include the basement, perform the test with the door between the basement and the building
open.
2.6 Total envelope area
Enter the “total envelope area” as the above grade surface area of the exterior envelope of the building,
in square metres.
This value is used to calculate any result that requires exposed surface area such as flow per unit of area.
The surface area will generally include all surfaces separating the conditioned space of the building from
unconditioned spaces (e.g. exterior walls, floors over unheated and vented crawlspaces, surfaces
separating the building and the attic, etc.), but how to make this measurement will be spelled out in the
Test Standard you are using.
2.7 Floor area
Enter the floor area of the building in square metres.
This value will be used to calculate all results that requires floor area, such as L/s per square metre of
floor area.
Generally the floor area includes the area of all floors that are intentionally heated. If you have included
the basement in your volume calculation, also include the basement in the floor area calculation. How
to measure floor area will be spelled out in the Test Standard you are using.
3 Enter Equipment (fans and gauges) used for the Test
Each gauge/fan pair is managed by the software. When you enter the serial numbers, ensure that the
correct gauge is paired with the fan in use. Matching fan model to gauge serial number is most
important, as the software calculates flows from the fan pressures reported by a gauge based on the
specific parameters of each fan model.
ATTMA requires that the fan(s) used in any test be calibrated by a third party calibration laboratory, and
that the corrections for the calibrations be made in the software program. This can be done in FanTestic
with minimal effort. See section 3.7 and section 3.8.
Information entered for the test technician, fan model, gauge model, and serial number will be saved
and entered automatically for you when you create a new test.
3.1 Fan Info
Select the model of the series of fan used in your system using the pictures in the fan drop-down as a
guide: