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Form No. S3378-1112
Supersedes S3378-712
Page 9 of 12
Typical Sound Performance with Installation/Isolation Curbs & Acoustical Plenums
WA/L3S Sound Data Matrix (dBA @ 10 feet)
Unit Mounting Direct
WMICF-5
Isolation
Curb
Direct Direct
WMICF-5
Isolation
Curb
WMICF-5
Isolation
Curb
Supply Air Treatment Grille
WAPFB51
Free Blow
Supply Air
Plenum
Standard
Supply Duct
Standard
Supply Duct
Standard
Supply Duct
WAPS51-G
Supply Air
Silencer
Return Air Treatment Grille
WAPR11-X
Return Air
Silencer
Grille
WAPR11-X
Return Air
Silencer
Blower Only Operation
with CRV
37.8 30.7 33.6 33.6 27.4 27.6
Compressor Stage 1
Operation with CRV
51.8 40.7 49.9 41.7 39.7 38.7
Compressor
Stage 2 Operation
52.3 41.4 50.8 42.4 40.8 39.9
Compressor Stage 2 with
ERV High Speed Operation
52.7 41.7 51.7 ²²42.9
Indoor Integrated dBA 43.8 35.0 40.7 37.2 32.8 32.6
Compressor Stage 2
Outdoor Sound Level
66.9 66.9 66.9 66.9 66.9 66.9
Note 1: dBA is sound pressure measured 10 feet in front of unit and 5 feet above floor.
Note 2: Unit or isolation curb is mounted to frame construction.
Note 3: Results may vary depending upon other factors such as room size, type of construction and acoustical variances.
WAPR11-X Return Air
Silencer
Ducted Supply ConfigurationFree Blow Configuration
WA/L4S Sound Data Matrix (dBA @ 10 feet)
Unit Mounting Direct
WMICF-5
Isolation
Curb
Direct Direct
WMICF-5
Isolation
Curb
WMICF-5
Isolation
Curb
Supply Air Treatment Grille
WAPFB51
Free Blow
Supply Air
Plenum
Standard
Supply Duct
Standard
Supply Duct
Standard
Supply Duct
WAPS51-G
Supply Air
Silencer
Return Air Treatment Grille
WAPR11-X
Return Air
Silencer
Grille
WAPR11-X
Return Air
Silencer
Blower Only Operation 40.1 38.9 38.4 34.5 32.8 28.2
Compressor
Stage 1 Operation
52.0 41.4 50.9 41.2 40.5 39.0
Compressor
Stage 2 Operation
53.7 44.0 52.9 44.3 42.0 40.5
Compressor Stage 2 with
ERV High Speed Operation
55.0 46.2 54.0 ²²44.8
Indoor Integrated dBA 45.4 40.4 44.0 37.8 35.8 33.0
Compressor Stage 2
Outdoor Sound Level
65.0 65.0 65.0 65.0 65.0 65.0
Note 1: dBA is sound pressure measured 10 feet in front of unit and 5 feet above floor.
Note 2: Unit or isolation curb is mounted to frame construction.
Note 3: Results may vary depending upon other factors such as room size, type of construction and acoustical variances.
Free Blow Configuration Ducted Supply Configuration
WAPR11-X Return Air
Silencer
WA/L5S Sound Data Matrix (dBA @ 10 feet)
Unit Mounting Direct
WMICF-5
Isolation
Curb
Direct Direct
WMICF-5
Isolation
Curb
WMICF-5
Isolation
Curb
Supply Air Treatment Grille
WAPFB51
Free Blow
Supply Air
Plenum
Standard
Supply Duct
Standard
Supply Duct
Standard
Supply Duct
WAPS51-G
Supply Air
Silencer
Return Air Treatment Grille
WAPR11-X
Return Air
Silencer
Grille
WAPR11-X
Return Air
Silencer
Blower Only Operation 40.3 33.3 35.1 34.8 33.5 31.1
Compressor
Stage 1 Operation
52.6 40.8 50.6 43.6 40.9 39.9
Compressor
Stage 2 Operation
56.7 45.3 51.6 46.8 44.5 43.2
Compressor Stage 2 with
ERV High Speed Operation
57.8 47.1 55.0 ²²45.4
Indoor Integrated dBA 46.2 37.2 41.8 39.0 37.2 35.4
Compressor Stage 2
Outdoor Sound Level
65.4 65.4 65.4 65.4 65.4 65.4
Note 1: dBA is sound pressure measured 10 feet in front of unit and 5 feet above floor.
Note 2: Unit or isolation curb is mounted to frame construction.
Note 3: Results may vary depending upon other factors such as room size, type of construction and acoustical variances.
Ducted Supply ConfigurationFree Blow Configuration
WAPR11-X Return Air
Silencer