Retrotec DucTester 341 - Manual (Page 12)

Page 12 of 83
©Retrotec Inc. 2014
Program/Region Units/Test
Pressure
Leakage requirement
2012 IECC International
Energy Conservation
Code
Global
CFM
25
/100 sq ft at
+ or - 25 Pa
Post Construction Test:
Total Duct Leakage: <= 4 CFM
25
/100 sq ft conditioned floor area.
OR
Rough-in Test with air handler
Total Duct Leakage: <= 4 CFM
25
/100 sq ft
OR
Rough-in Test with no air handler:
Total Duct Leakage: <= 3 CFM
25
/100 sq ft
Required:
-Where ducts are located outside the conditioned space
-In existing houses where more than 50% of the ducts are replaced
Not Required:
- If all ducts are located in the conditioned space
New York State Energy
Code
NY: USA CFM
25
/100 sq ft
Total leakage at
±25 Pa
Total Duct Leakage: <= 8.0 CFM
25
/100 sq ft of conditioned floor area or 6% of air
handler flow. Measured at supply closest to air handler.
Test equipment must be certified by manufacturer that it complies with ASTM
E1554-07 and ASHRAE Standard 152. Duct leakage to outdoors acceptable
under Method A of ASMT E1554-07.
North Carolina Energy
Conservation Code
NC: USA CFM
25
/100 sq ft
Total leakage at
– 25 Pa
Total Duct Leakage: <= 6.0 CFM
25
/100 sq ft of conditioned floor area.
Depressurize to -25 Pa measured at supply closest to air handler.
Test equipment must be certified by manufacturer that it complies with ASTM
E1554-07.
Northwest ENERGY STAR
Homes
ID, MO, OR, WA: USA CFM
50
/sq ft
CFM
50
+ 50 Pa
Total Duct Leakage, air handler in un-conditioned space
CFM
50
<= floor area (sq ft) X 0.04 (which is same as CFM
50
/ sq ft <= 0.04)
OR CFM
50
<= 50 (when house < 1250 sq ft)
OR
Total Duct Leakage, air handler in conditioned space
CFM
50
<= floor area (sq ft) X 0.06 (which is same as CFM
50
/ sq ft <= 0.06)
OR CFM
50
= 75 (when house < 1250 sq ft)
Not Required:
If both the ducts and air handler are located within the conditioned space
Oregon State Energy
Code
OR: USA
Washington State Energy
Code
WA: USA CFM
25
/sq ft
Total leakage at
+ 25 Pa
Total Duct Leakage
with air handler NOT installed <= floor area (sq ft) X 0.04 CFM
25
with air handler installed <= floor area (sq ft) X 0.08 CFM
25
OR
Duct Leakage to Outdoors (recommended where possible)
<= floor area (sq ft) X 0.06 CFM
25