Retrotec DucTester 200 Series Residential Applications Instrukcja Użytkownika Pobierz pdf (Strona 31)

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4. Set up the gauge to display Duct Leakage Results

Read the Total Duct Leakage results directly from the gauge. On the DM-2 this is the results display

”Mode”. In order to compare duct systems in different homes/buildings, it is necessary to normalize the

leakage results for the size of the HVAC system and the size of the building. The two most common

variables used to normalize duct leakage are total HVAC flow rate and the floor area of the building.

Figure 31: Some of the most common results that can be read directly off the gauge.

4.1 Mode setup for duct testing in the US

Table 3 shows what settings will directly calculate the results required for testing compliance with the

codes adopted in the various states.

Table 3: Gauge Mode Setup for US state Codes and programs for Duct Testing

Code

2009

IECC

ENERGY

STAR

Northwest

ENERGY STAR

Homes

Title-24

Code

WA State

Code

Region:

VT GA CT DE

GA ID IL IO

MA NC NH NJ

NY OH TX

USA

ID MO OR WA

Pressure

Flow

CFM

(Flow) @ Pressure

@25 Pa

@50 Pa

@25 Pa

EqLA

Off

(EqLA) @ Pressure

n/a

EfLA, Effective Leakage

Area

Off

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 90 91

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