HomeMy WebLinkAboutDuct Leakage TestTest Date: 2025-01-03
Client Tester
Building Description Slawek Wojciuch Company Dexter Diagnostics
Building Address 34 Vista Place Address 18 Crescent Pl
Glenwood Springs, CO 81601 Glenwood Springs, CO 81601
Contact Slawek Wojciuch Technician Amanda Poindexter
Phone 970-987-2353 Phone 720-219-3683
Test Type Gauge S/N 2070150
Fan series 200 Fan S/N LF2001000
Conditioned Floor Area 3343.0 sq ft
Percentage of Duct Leakage to Outdoors 25% (estimated)
Supply Return
Average Duct Operating Pressure 25.0 Pa 25.0 Pa
Leakage Split 50% 50%
Leakage Penalty 100% 50%
Depressurization
Duct Pressure -11.6 Pa
Fan Pressure 181.0 Pa
Range Configuration Open-
Duct Leakage 439.6 CFM
Leakage Area 120.0 sq in
Leakage constant, C 101.01
Leakage Exponent 0.60 (assumed)
Duct Leakage to Outdoors
Leakage/Conditioned Floor Area
Duct Leakage
Test Report
0.131 CFM/sq ft at 25 Pa
Building and Duct Details
439.6 CFM at 25 Pa
109.9 CFM at 25 Pa
Leakage Results
Leakage Data
131 CFM/1,000 sq ft at 25 Pa
13.1 CFM/100 sq ft at 25 Pa
Per the 2018 IECC: R403.3.4 Duct leakage
(prescriptive). The total leakage of the ducts, where
measured in accordance with Section R403.3.3,
shall be as follows:
1.) Postconstruction test: Total leakage shall be
less than or equal to 4 CFM per 100 SF of
conditioned floor area.
Maximum allowable:
4 CFM x 3,343/100 sq ft = 134 CFM at 25 Pa
* Total Duct Leakage - DOES NOT PASS
* Duct Leakage to Outdoors - If considered, this
project would pass at 12 CFM.
Target pressure of -25 Pa was not able to be achieved.