Form No.
S3378-1013
Supersedes
S3378-313
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
²
²
42.9
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 Configuration
Free 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
²
²
44.8
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
²
²
45.4
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 Configuration
Free Blow Configuration
WAPR11-X Return Air
Silencer
