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Typical Sound Performance with Installation/Isolation Curbs & Acoustical Plenums
WA/L3S Sound Data Matrix (dBA @ 10 feet)
Compressor Stage 2 with
ERV High Speed Operation
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.
WA/L4S Sound Data Matrix (dBA @ 10 feet)
Compressor Stage 2 with
ERV High Speed Operation
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.
WA/L5S Sound Data Matrix (dBA @ 10 feet)
Compressor Stage 2 with
ERV High Speed Operation
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
WMICF-5
Unit Mounting
Direct
Isolation
WAPFB51
Free Blow
Supply Air Treatment
Grille
Supply Air
Plenum
WAPR11-X
Return Air
Return Air Treatment
Grille
Silencer
Blower Only Operation
37.8
with CRV
Compressor Stage 1
51.8
Operation with CRV
Compressor
52.3
Stage 2 Operation
52.7
Indoor Integrated dBA
43.8
Compressor Stage 2
66.9
Outdoor Sound Level
Free Blow Configuration
WMICF-5
Unit Mounting
Direct
Isolation
WAPFB51
Free Blow
Supply Air Treatment
Grille
Supply Air
Plenum
WAPR11-X
Return Air
Return Air Treatment
Grille
Silencer
Blower Only Operation
40.1
Compressor
52.0
Stage 1 Operation
Compressor
53.7
Stage 2 Operation
55.0
Indoor Integrated dBA
45.4
Compressor Stage 2
65.0
Outdoor Sound Level
Free Blow Configuration
WMICF-5
Isolation
Unit Mounting
Direct
WAPFB51
Free Blow
Supply Air Treatment
Grille
Supply Air
Plenum
WAPR11-X
Return Air
Return Air Treatment
Grille
Silencer
Blower Only Operation
40.3
Compressor
52.6
Stage 1 Operation
Compressor
56.7
Stage 2 Operation
57.8
Indoor Integrated dBA
46.2
Compressor Stage 2
65.4
Outdoor Sound Level
Ducted Supply Configuration
WMICF-5
Direct
Direct
Isolation
Curb
Standard
Standard
Standard
Supply Duct
Supply Duct
Supply Duct
WAPR11-X Return Air
Grille
Silencer
30.7
33.6
33.6
40.7
49.9
41.7
41.4
50.8
42.4
41.7
51.7
35.0
40.7
37.2
66.9
66.9
66.9
Ducted Supply Configuration
WMICF-5
Direct
Direct
Isolation
Curb
Standard
Standard
Standard
Supply Duct
Supply Duct
Supply Duct
WAPR11-X Return Air
Grille
Silencer
38.9
38.4
34.5
41.4
50.9
41.2
44.0
52.9
44.3
46.2
54.0
40.4
44.0
37.8
65.0
65.0
65.0
Ducted Supply Configuration
WMICF-5
Isolation
Direct
Direct
Curb
Standard
Standard
Standard
Supply Duct
Supply Duct
Supply Duct
Grille
WAPR11-X Return Air
Silencer
33.3
35.1
34.8
40.8
50.6
43.6
45.3
51.6
46.8
47.1
55.0
37.2
41.8
39.0
65.4
65.4
65.4
WMICF-5
Isolation
Curb
Curb
WAPS51-G
Supply Air
Silencer
WAPR11-X
Return Air
Silencer
27.4
27.6
39.7
38.7
40.8
39.9
42.9
32.8
32.6
66.9
66.9
WMICF-5
Isolation
Curb
Curb
WAPS51-G
Supply Air
Silencer
WAPR11-X
Return Air
Silencer
32.8
28.2
40.5
39.0
42.0
40.5
44.8
35.8
33.0
65.0
65.0
WMICF-5
Isolation
Curb
Curb
WAPS51-G
Supply Air
Silencer
WAPR11-X
Return Air
Silencer
33.5
31.1
40.9
39.9
44.5
43.2
45.4
37.2
35.4
65.4
65.4
Form No.
S3378-1013
Supersedes
S3378-313
Page
9 of 12
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