In the late 60's, Kinetics introduced the first spring isolation rails,
which were installed between the rooftop equipment and the roof curb. These
did an excellent job isolating the vibration from the rooftop equipment
to the building structure; however, they did not address the problems of
duct-borne noise or equipment breakout noise into the conditioned space.
Today, Kinetics introduces the ESSR. The ESSR incorporates all the features
of our ESR vibration isolation curb with our Vibron aerodynamic acoustical
silencers; return air plenums and Noiseblock STL panels. This gives you
a noise control system that addresses all the noise and vibration concerns
of your packaged rooftop equipment: vibration from the rotating equipment
and casing radiation, duct-borne noise from supply and return fans, and
breakout noise from the fans and compressors into the space below.
You tell us the NC level you want, the packaged system you want to use
and some information on the building construction and we select the ESSR
package designed to meet your needs. As with the ESR, the ESSR can be designed
to meet all seismic and wind load code requirements. The ESSR is a modular
system based on your needs. You may not need the acoustical return air plenum
and the aerodynamic supply silencer - one or the other may be sufficient.
Depending on the roof construction and the space usage below the packaged
unit, the STL panels may not be required. We will select only the acoustical
elements necessary to meet your needs.
The Kinetics ESSR is the only isolated curb system that
addresses all four noise sources associated with packaged rooftop equipment.
Here's how:
Vibration
from fans and compressors (source 1) and vibration from casingradiated noise
caused by duct turbulence and the airborne noise of the fans and compressors
(source 2) are controlled with Kinetics high deflection, laterally stable
coil spring isolators and high frequency neoprene noise pads.
Duct-borne
noise from the supply and return air fans (source 3) are controlled using
an aerodynamic acoustical silencer on the supply fan and an acoustical plenum
on the return air side - both with minimal pressure drop.
Breakout
noise through the bottom of the rooftop unit (source 4) is controlled by
the Noiseblock STL acoustical panel located in the floor of the ESSR.
| Sound Rating NC-35 |
Model ESSR-35-5
(Based on Carrier Model 48TJ006) |
Model ESSR-35-10
(Based on Carrier Model 48TJ012) |
Unit Capacity
Maximum CFM |
5 Tons
2,000 |
10 Tons
4,000 |
| Vibration Isolation |
Spring Isolators - 2" Static Deflection* |
Spring Isolators - 2" Static Deflection* |
| Integral Supply - Air Silencer |
|
|
| Type |
Offset Elbow Silencer |
Offset Elbow Silencer |
| Duct Size |
20.25" x 18.88" |
31.38" x 15.68" |
| Overall Dimensions (W x L x H) |
20.25" x 66" x 38" |
31.38" x 76" x 40" |
| CL Length |
102" |
112" |
| Insertion Loss (dB) |
63 Hz
13 |
125 Hz
21 |
250 Hz
34 |
500 Hz
50 |
63 Hz
13 |
125 Hz
21 |
250 Hz
34 |
500 Hz
50 |
| Pressure Drop (wg) |
Less than 0.2" at 2,000 CFM |
Less than 0.2" at 4,000 CFM |
| Integral Return - Air Acoustic Plenum |
|
|
| Type |
Lined Acoustic Plenum with Diffusing Element |
Lined Acoustic Plenum with Diffusing Element |
| Duct Size |
13.5" x 14" |
15.38" x 40" |
| Overall Dimensions (W x L x H) |
13.5" x 66" x 38" |
15.38" x 76" x 40" |
| Insertion Loss (dB) |
63 Hz
13 |
125 Hz
16 |
250 Hz
18 |
500 Hz
18 |
63 Hz
13 |
125 Hz
16 |
250 Hz
18 |
500 Hz
18 |
| Pressure Drop (wg) |
Less than 0.1" at 2,000 CFM |
Less than 0.1" at 4,000 CFM |
| Sound Rating NC-35 |
Model ESSR-35-30
(Based on Carrier Model 48DJ034) |
Model ESSR-35-50
(Based on Carrier Model 48DJ054) |
Unit Capacity
Maximum CFM |
30 Tons
10,500 |
50 Tons
17,500 |
| Vibration Isolation |
Spring Isolators - 2" Static Deflection* |
Spring Isolators - 2" Static Deflection* |
| Integral Supply - Air Silencer |
|
|
| Type |
Offset Elbow Silencer |
Offset Elbow Silencer |
| Duct Size |
67.25" x 26.69" |
67.25" x 47" |
| Overall Dimensions (W x L x H) |
67.25" x 96" x 50" |
67.25" x 96" x 72" |
| CL Length |
120" |
120" |
| Insertion Loss (dB) |
63 Hz
13 |
125 Hz
21 |
250 Hz
34 |
500 Hz
50 |
63 Hz
13 |
125 Hz
21 |
250 Hz
34 |
500 Hz
50 |
| Pressure Drop (wg) |
Less than 0.2" at 10,500 CFM |
Less than 0.2" at 17,500 CFM |
| Integral Return - Air Acoustic Plenum |
|
|
| Type |
Lined Acoustic Plenum with Diffusing Element |
Lined Acoustic Plenum with Diffusing Element |
| Duct Size |
80.5" x 54" |
80.5" x 65" |
| Overall Dimensions (W x L x H) |
80.5" x 120" x 50" |
80.5" x 144" x 72" |
| Insertion Loss (dB) |
63 Hz
13 |
125 Hz
16 |
250 Hz
18 |
500 Hz
18 |
63 Hz
13 |
125 Hz
16 |
250 Hz
18 |
500 Hz
18 |
| Pressure Drop (wg) |
Less than 0.1" at 10,500 CFM |
Less than 0.1" at 17,500 CFM |
| Sound
Rating NC-35 |
Model ESSR-35-60
(Based on Carrier Model 48DJ064) |
Model ESSR-35-100
(Based on Carrier Model 48DK104) |
Unit Capacity
Maximum CFM |
60 Tons
21,000 |
100 Tons
35,000 |
| Vibration Isolation |
Spring Isolators - 2" Static Deflection* |
Spring Isolators - 2" Static Deflection* |
| Integral Supply - Air Silencer |
|
|
| Type |
Offset Elbow Silencer |
Offset Elbow Silencer |
| Duct Size |
67.25" x 47" |
69.5" x 52.63" |
| Overall Dimensions (W x L x H) |
69.25" x 96" x 72" |
69.5" x 120" x 76" |
| CL Length |
120" |
144" |
| Insertion Loss (dB) |
63 Hz
13 |
125 Hz
21 |
250 Hz
34 |
500 Hz
50 |
63 Hz
13 |
125 Hz
21 |
250 Hz
34 |
500 Hz
50 |
| Pressure Drop (wg) |
Less than 0.2" at 21,000 CFM |
Less than 0.2" at 35,000 CFM |
| Integral Return - Air Acoustic Plenum |
|
|
| Type |
Lined Acoustic Plenum with Diffusing Element |
Lined Acoustic Plenum with Diffusing Element |
| Duct Size |
80.5" x 65" |
81.5" x 52.63" |
| Overall Dimensions (W x L x H) |
80.5" x 144" x 72" |
81.5" x 144" x 76" |
| Insertion Loss (dB) |
63 Hz
13 |
125 Hz
16 |
250 Hz
18 |
500 Hz
18 |
63 Hz
13 |
125 Hz
16 |
250 Hz
18 |
500 Hz
18 |
| Pressure Drop (wg) |
Less than 0.1" at 21,000 CFM |
Less than 0.1" at 35,000 CFM |
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