n45 architecture inc. environmental noise impact study

REP N45 890-900 BANK ST. ENVIRONMENTAL NOISE STUDY of 16

STATE OF THE ART ACOUSTIK INC. 43 – 1010 Polytek Street Ottawa, ON K1J 9J3 www.sota.ca E: [email protected] T: 613-745-2003 F: 613-745-9687

2014-06-20 Robert Matthews, B.ARCH., O.A.A., A.A.N.B., R.A.I.C. N45 ARCHITECTURE INC. 2nd floor, 43 Eccles Street | Ottawa, Ontario | Canada K1R 6S3 TEL 613-224-0095 x 234 FAX 613-224-9811 | [email protected]

N45 Architecture Inc. – 890-900 Bank Street Redevelopment

Environmental Noise Impact Study Dear Robert, We have completed an environmental noise study for the proposed commercial building at 890-900 Bank St. in Ottawa. The purpose of our study is to estimate the potential noise impact from rooftop mechanical equipment, the garbage compactor and loading dock to the nearest residential buildings. The following drawings and data were used for this report:

Architectural drawings for “890-900 Bank St Redevelopment”, dated May 7, 2014.

Preliminary Service Summation Sheet and Manufacturer’s Sound Power Level data for 22 Rooftop Units (RTUs), representative condensing unit data and a description of the generator as provided by Quadrant Engineering.

Based on this information, we have created a 3D acoustical model of the proposed commercial building and have calculated the worst-case predicted noise levels at the 2 nearest residential buildings: The townhouse at 25 Monk St and the house at 7 Melgund Avenue. The calculated Sound Pressure Levels (SPL) at the two nearest Points of Reception (POR) are 61.5 dBA and 56.5 dBA, which are above the City of Ottawa By-Law limit of 50 dBA. In order to keep the sound pressure levels at these residential buildings below the noise by-law limits, our recommendation is to do both of the following:

1. Select quieter rooftop equipment (maximum outdoor casing radiated sound power levels of 83 dBA for RTUs and condensing units, generator with 65 dBA @ 7m rated enclosure.)

2. Place equipment in the middle of the roof, as far away as possible from the neighbouring residential buildings.

We have also provided recommendations to minimize the noise impact from the loading dock and garbage compactor facilities. Should you have any questions regarding this report, please do not hesitate to contact us. Sincerely, Jeremy Thorbahn, M.Sc. Acoustical Consultant

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Environmental Noise Study for

890-900 Bank St., Ottawa, Ontario

Prepared for: N45 Architecture Inc.

Prepared by:

Jeremy Thorbahn, M.Sc.

June 20, 2014

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Contents 1. Introduction ...............................................................................................................4

2. Site Description and By-Law Requirements ..................................................................4

2.1 Operation hours for the Facility ...................................................................................... 4

2.2 Site Plan and Scaled Area Location Plan .......................................................................... 4

2.3 Noise By-Law ................................................................................................................... 5

3. Noise Sources .............................................................................................................6

3.1 Significant Rooftop Noise Sources ................................................................................... 6

3.2 Other Noise Sources ........................................................................................................ 7

3.3 Points of Reception ......................................................................................................... 7

4. Methodology Used in Noise Impact Calculation ...........................................................8

4.1 Procedure Used to Assess Noise Impact at Each Point of Reception .............................. 8

4.2 Other Parameters/Assumptions Used in Calculations .................................................... 8

5. Acoustic Assessment Summary ...................................................................................9

5.1 Acoustic Assessment Summary for All Equipment with No Noise Mitigation ................ 9

6. Noise Control Measures and Recommendations ........................................................ 10

6.1 Generator Noise Control Recommendations ................................................................ 13

7. Garbage Compactor and Loading Dock Noise ............................................................. 13

8. Conclusion ................................................................................................................ 14

Appendix A Manufacturer Sound Power Level Data for RTUs ................................................ 16

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1. Introduction State of the Art Acoustik Inc. has been commissioned by N45 Architecture Inc. to complete an environmental noise study for a 2 story commercial building to be located at 890-900 Bank St. in Ottawa, Ontario. This building will be constructed in an area that has a mix of commercial and residential buildings. Due to the building’s proximity to local residences, this report’s environmental noise assessment and design recommendations will ensure adherence to the City of Ottawa’s noise by-law. This by-law states that the total sound pressure level from all mechanical equipment must be below 50 dBA SPL, or the existing background noise level (whichever is higher), at any sensitive points of reception (By-law no. 2004-253). This assessment assumes the mechanical equipment operates at all times. There are 22 Rooftop Units (9 different sizes) that are being considered for this assessment, as well as 20 condensing units and 1 generator. The noise from the garbage compactor and loading dock is considered as well along with recommendations to reduce their noise impact. All the data for the rooftop equipment is preliminary as the mechanical design has not been completed at this time.

2. Site Description and By-Law Requirements The proposed development at 890-900 Bank St. is a 2 storey commercial building situated between Bank Street and Monk Street south of Thornton Avenue. While there is a possible hotel development above the 2 stories of commercial space, this report considers only the 2 stories of commercial space all noise calculations assume the hotel portion is not present. The building will be located in a neighbourhood that contains a mix of commercial and residential buildings. Mechanical plans have not yet been finalized and the locations of the RTUs and condensers have not yet been decided, so we have considered the worst-case scenario where all mechanical equipment is located at the edge of the roof closest to the PORs, with each unit located approximately above the tenant space to which it is assigned. 2.1 Operation hours for the Facility The rooftop HVAC equipment is assumed to run 24 hours a day 7 days a week. The generator is assumed to run only during emergencies and for periodic testing each month. The loading dock and compactor are assumed to operate periodically during daytime hours only. 2.2 Site Plan and Scaled Area Location Plan Figure 2.1 on the following page shows a site plan for the proposed development at 890-900 Bank St.

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Figure 2.1 – Site plan for 890-900 Bank St. and closest residential Points of Reception

2.3 Noise By-Law The City of Ottawa Noise By-Law no. 2004-253 states:

4. “No person shall use or operate or cause to be used or operated any air conditioner, heat pump, compressor, condenser, chiller, cooling tower or similar device, the noise from which has a level greater than 50 dBA when measured at the point of reception.” and, 5. (1): “No person shall use or operate or cause to be used or operated any exhaust fan, exhaust system, intake fan, generator, dryer in a commercial car wash or similar device which includes combustion exhaust of a high efficiency furnace, the noise from which has a level greater than 50 dBA when measured at the point of reception.”

Where the "point of reception" means any point on the premises of a person where sound or vibration originating from other than those premises is received”. For our analysis, the points of reception are chosen based on the principle of "predictable worst case scenario" for noise impact. This will allow us to calculate the largest noise impact and mitigate it accordingly.

POR 1

POR 2

Rooftop Units, Condensing Units and Generator

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3. Noise Sources The following section describes the characteristics of the significant noise sources. 3.1 Significant Rooftop Noise Sources This report evaluates 43 rooftop noise sources: 22 RTUs of various sizes, 20 condensing units and 1 generator. Table 3.1.1 describes the types and quantities of equipment and Table 3.1.2 summarizes the octave-band sound power levels used. Sound power data for RTUs are based on York models of the required capacity as specified by Optimum Mechanical Solutions.

Significant Sources

Capacity Manufacturer Model/Series Quantity Sound

Power Level Used (dBA)

RTU1 1 ton York Affinity DNZ024 2 77

RTU2 2 ton York Affinity DNZ024 1 77

RTU2.5 2.5 ton York Affinity DNZ030 3 74

RTU3 3 ton York Sunline ZF036 1 81

RTU4 4 ton York Sunline ZF048 3 80

RTU6 6 ton York Predator ZH078 2 82

RTU6.5 6.5 ton York Predator ZH078 1 83

RTU7.5 7.5 ton York Predator ZH090 2 83

RTU10 10 ton York Predator ZH120 7 90

Mechanical Condenser

Unknown Unknown Unknown 1 96.51

Refrigeration Condenser

Unknown Unknown Unknown 3 841

Generator Unknown Unknown Unknown 1 93.32

Table 3.1.1 – Summary of Rooftop Noise Sources used in this Analysis

1As the tenant requirements for condensing units have not yet been established, we have based our model on quantities of equipment and data from another current project where a Sobeys grocery store is being developed in Ottawa. This includes one Trane 60 ton mechanical condenser and 3 smaller RefPlus refrigeration condensers (See data in Appendix).

2Quadrant Engineering has confirmed that the generator will be housed in a sound attenuated weatherproof enclosure. We will add a representative generator (see data in Appendix) to our acoustical model to determine the sound rating required for the enclosure to meet noise level limits.

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Noise Source 63 Hz 125 Hz 250 Hz 500 Hz 1 KHz 2 KHz 4 KHz 8 KHz Total dBA

RTU1 64.0 64.0 65.5 68.0 72.5 64.5 60.5 48.5 74.2

RTU2 64.0 64.0 65.5 68.0 72.5 64.5 60.5 48.5 74.2

RTU2.5 63.5 63.5 64.5 66.5 67.0 63.0 57.5 51.5 70.4

RTU3 87.5 86.0 81.0 77.0 75.0 69.5 65.5 70.5 80.3

RTU4 84.5 81.0 80.0 78.0 75.0 70.0 67.0 70.5 80.3

RTU6 89.0 88.5 84.5 84.5 82.0 76.5 72.0 66.5 86.3

RTU6.5 89.0 88.5 84.5 84.5 82.0 76.5 72.0 66.5 86.3

RTU7.5 93.0 92.0 90.5 88.0 86.5 83.0 77.5 73.5 91.1

RTU10 99.5 91.5 91.5 89.0 86.0 80.5 76.5 71.0 90.9

Mechanical Condenser 97.0 92.0 92.0 94.0 90.5 89.0 87.0 85.0 96.5

Refrigeration Condenser 84.5 79.5 79.5 81.5 78 76.5 74.5 72.5 84.0

Generator 56.5 73.5 79.5 84.5 86.5 87.5 86.5 84.5 93.3 Table 3.1.2 – Octave Band Sound Power Levels of Noise Sources

Locations of mechanical equipment in our model will be based on the locations of the tenant spaces to which they are assigned, as specified in the Preliminary Service Summation Sheet provided by the mechanical contractor. The Preliminary Service Summation listed one Makeup Air Unit (MAU) in addition to the RTUs, however it was confirmed by the contractor that the MAU will no longer be used. If they are added at a later date, we will need to re-analyze and re-issue this report. The manufacturer’s data sheets for the RTUs are included in the Appendix. 3.2 Other Noise Sources In addition to the rooftop equipment, there are other noise sources related to the proposed retail space that must be considered, such as the garbage compactor and shipping/receiving activity at the loading dock. The impact of these sources on the nearby residences is discussed in Section 6. 3.3 Points of Reception Points of reception have been selected by using worst case situations for the following types of development: permanent or seasonal residences, hotels/motels, nursing/retirement homes, rental residences, hospitals, camp grounds, and noise sensitive buildings such as schools and places of worship. We have chosen the two most sensitive Points of Reception (POR) for the noise level analysis, which are illustrated in figure 2.1. The minimum distances from the source building to the points of reception are stated below:

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POR1 25 Monk St. townhouse, 6m to the West (3rd level, 9m above ground) POR2 7 Melgund Ave. house, 15m to the West (2rd level, 6m above ground)

(Distances are from closest edge of the 890-900 Bank St. rooftop to the point of reception)

4. Methodology Used in Noise Impact Calculation The following sections describe the methodology and software used to model the sound pressure levels at the points of reception due to the noise sources while taking into account parameters such as source levels, distance, topography, barriers and building geometry. 4.1 Procedure Used to Assess Noise Impact at Each Point of Reception This environmental noise analysis was done using the environmental noise modeling software package CadnaA, which references ISO 9613. CadnaA predicts environmental noise through calculations based on a 3D model which uses geometrical, landscape and topography data, combined with details of the proposed construction and the noise source power levels. We created a 3D rendering of the neighbourhood around 852 Bank St. and placed the noise sources with the manufacturer’s sound power levels in the model (represented by the blue crosses). The colours on the ground and building represent the sound pressure level in that area. Sound power levels per octave band were entered into CadnaA at the source’s location and the resulting sound pressure levels were calculated at the points of reception. 4.2 Other Parameters/Assumptions Used in Calculations The following chart describes the parameters used in the CadnaA model:

Parameter Value/Condition

Ground Absorption Set to 0 for ground reflection

Building Reflections Set to 2 orders of reflection

Temperature (°C) 10

Relative Humidity (%) 70

Table 4.1 – Parameters used in CadnaA modeling.

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5. Acoustic Assessment Summary This section summarizes the CadnaA sound pressure level results for the model with and without noise mitigation measures. Section 5.1 below illustrates the steady state sound pressure levels generated by all the noise sources with no mitigation. Section 6 summarizes our noise mitigation recommendations and the resulting sound pressure levels. 5.1 Acoustic Assessment Summary for All Equipment with No Noise Mitigation Figure 5.1 indicates the locations of rooftop equipment used in our base model to determine the worst case noise impact on nearby residences from the rooftop equipment at 890-900 Bank St. The locations of the generator and four condensers are labeled as GEN and COND while each of the 22 RTUs are labelled according to their capacity in tons. Locations were chosen based on the tenant spaces to which equipment is currently assigned and placed near the building edge as a worst case scenario for noise impact to the nearby residences.

Figure 5.1 – Locations of rooftop equipment in base model

The noise map in Figure 5.2 indicates sound pressure levels at nearby building faces due to the rooftop mechanical equipment, with colour corresponding to sound level according to the legend. Using the legend, it can be seen that for the worst-case scenario where the RTUs are at the edge of the roof, closest to PORs 1 & 2, the PORs have SPLs in excess of the by-law limit of 50dBA.

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Figure 5.2 - Sound Pressure Levels (SPL) due to RTUs, condensers and generator with no mitigation

measures (colours will display properly when this document is printed in colour or viewed electronically)

Table 5.1 below summarizes the total calculated SPLs at the PORs.

Worst-Case Scenario Sound Pressure at each POR

POR1 (dBA) POR2 (dBA)

61.5 56.5

Table 5.1 – SPLs (dBA) at the PORs with no noise mitigation With the equipment located at the edges of the roof closest to PORs 1&2, the SPL at POR 1 is 61.5 dBA and the SPL at POR 2 is 56.5 dBA. These sound levels are well above the by-law limit, thus noise mitigation solutions will be required. We present two noise reduction options in the following section.

6. Noise Control Measures and Recommendations In order to meet the by-law limit of 50 dBA at each point of reception, we evaluated two noise mitigation solutions using our CadnaA model. Each solution is discussed below and our preferred noise reduction method is indicated. Option 1: Select Quieter Equipment and Locate in Middle of Roof, Away from Building Edges (This is our primary recommendation) The simplest and most effective method to reduce the noise at the PORs is to select quieter mechanical equipment and to place it strategically on the roof. To do this, we moved the RTUs, generator and condensers towards the center of the roof in our model, away from the building

POR1 25 Monk St. 61.5 dBA SPL

POR2 7 Melgund Ave.

56.5 dBA SPL

Condensers (84-96.5 dBA SWL)

RTUs (74-90 dBA SWL) Generator

(65 dBA @ 7m)

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edges and adjusted the sound power level of the units until the SPL at each POR was below 50 dBA. We determined that the maximum allowable casing radiated SWL for each RTU or condenser is 83 dBA. Only the RTU selections larger than 6 ton and the condensers used in our model currently exceed this level and require a quieter selection. Figure 6.1 on the following page shows the new equipment locations and resulting noise levels at each POR.

Figure 6.1 – SPLs at each POR using equipment with maximum 83 dBA sound power level, located away

from the edge of roof (colours will display properly when this document is printed in colour or viewed electronically)

Using equipment with a maximum SWL of 83 dBA, located towards the center of the roof away from the building edges, we found that the SPLs at all PORs are below the noise by-law limit of 50dBA. This is our primary recommendation. Table 6.1 below summarizes the sound pressure levels at each POR.

Sound Pressure Levels at each POR with Option 1 Solution


49.6 47.2

Table 6.1 – SPLs (dBA) at the PORs using quieter equipment in the middle of the roof While the sound pressure level at POR 1 is near the by-law limit of 50 dBA, it is expected that this is below the daytime background noise level in the area due to the high volume of traffic on Bank St., which we expect to be approximately 55 dBA based on our previous measurements.


POR2 7 Melgund Ave.

47.2 dBA SPL

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Option 2: Use Current Equipment Selection and Construct Barriers around perimeter of building If it is not possible to select quieter equipment and the current selection of RTUs must be used, then sound transmission can be mitigated by constructing an acoustical barrier around the perimeter of the building. Figure 6.2 on the following page illustrates the required barrier locations if equipment is to be located near the edge of the roof. While we have modeled a barrier around the entire building perimeter, the extent required will depend on the final locations of equipment.

Figure 6.2 – SPLs at each POR using current equipment selections and acoustic barrier around perimeter of roof

(colours will display properly when this document is printed in colour or viewed on a computer).

Using solid barriers as show in the figure above, the sound pressure levels at each POR are as follows:

Sound Pressure Levels at each POR with Option 2 Solution


50.4 47.3 Table 6.2 – SPLs (dBA) at the PORs using current equipment selections and acoustic barrier

While the sound pressure level at POR 1 is slightly above the by-law limit of 50 dBA, it is expected that this is below the daytime background noise level in the area due to the high volume of traffic on Bank St., which we expect to be approximately 55 dBA based on our previous measurements.


POR2 7 Melgund Ave.

47.3 dBA SPL

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The barrier solution will be costly but will result in noise levels below or at the 50 dBA by-law limit at PORs 1 and 2. We do not recommend this option if it can be avoided. If barriers are the preferred solution, they must be constructed in the following manner:

Be minimum 1m higher than all equipment

Be continuous from the top of the barrier to the bottom at the roof surface (no gaps either along the barrier or below the barrier)

Have no gaps between barrier panels

Have a surface density of at least 20kg/m2. Rain drainage will have to be routed around the barriers and drains adjusted accordingly. 6.1 Generator Noise Control Recommendations As the generator will be housed in a sound-attenuated weatherproof enclosure, our noise control recommendations are based on choosing the appropriate sound rating for the enclosure. Using a typical sound spectrum for generator noise, we have calculated the resulting level at the points of reception and determined the attenuation required to remain within the by-law limit. We have found that an enclosure rated for 65 dBA sound pressure level at 7 meters will be sufficient as long as the unit is located near the center of the rooftop away from any edge.

7. Garbage Compactor and Loading Dock Noise Garbage Compactor Architectural drawings indicate that the garbage compactor is to be located within the loading dock area on the west side of the building facing Monk Street, approximately 25-30 meters from the homes there. Compactors are available with sound output as low as 60 dBA at a distance of 3m1. As sound pressure levels drop by about 6 dB per doubling of distance, a sound output of 60 dBA at 3m would be only about 42 dBA at 25m, a level that would be inaudible over the daytime background noise level, assuming a background noise level of 55 dBA that would be typical near a busy street such as Bank Street. Although there is no by-law limit on the noise output from garbage compactors, we have the following recommendations to minimize the disturbance from the garbage compactor to the nearby homes:

The selected unit should have a low sound output, as described above.

For compactors with a hydraulic drive, this is likely to be the noisiest part of the unit and we therefore recommend that the drive be located on the end farthest from the street.

The compactor should be operated only between the hours of 0700 and 2300. 1http://www.ggcompactors.co.uk/specs/GG_compactors.pdf

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Loading Dock Based on observations and measurements that we have made in the Ottawa area, grocery stores receive between 5-10 deliveries from semi-trailer trucks on a typical weekday, with a higher volume of deliveries during morning hours. We have measured noise from a loading dock during peak activity where several trucks were moving in and out of the dock and unloading, and found that at a distance of 20 meters, integrated noise levels reached about 68 dBA over a period of 1 hour. We expect this to represent the worst-case scenario for 890-900 Bank St and the residences on Monk St at a distance of approximately 20m. The background traffic noise level at the same time of day was found to be 55 dBA. Although the City of Ottawa Noise By-Law has no noise level limit for source such as loading docks, we have the following recommendations to minimize the disturbance from loading activity to the nearby homes:

The dock should be equipped with rubber bumpers and a gasket system so that trucks linking to the dock cause no sharp impulsive sounds and so that cargo can be unloaded directly into the building without transmitting excess noise into the surroundings.

Trucks should never idle unnecessarily at the loading dock. The noise by-law prohibits idling in excess of 5 minutes unless required for the preservation of perishable cargo (i.e. in a refrigerated truck).

No loading can take place between the hours of 2300 and 0700, as prohibited by the noise by-law. Other time exclusions may be required, to be determined in the future, as the loading dock is very near the residences.

The only effective way to mitigate the noise from the loading dock is to move the loading dock away from noise sensitive areas or to build solid barriers higher than the truck noise sources, or have an enclosed loading dock.

8. Conclusion Using site plans and aerial maps as well as manufacturer sound power level data for the RTUs and representative data for grocery store condensing units, we created a 3D acoustical model of the proposed redevelopment at 890-900 Bank St. and calculated the sound pressure levels at the nearest residential buildings. Since the final location and selection of the mechanical equipment has not yet been decided, we examined the worst-case scenario where the RTUs are located at the edge of the roof closest to the points of reception. This worst-case scenario resulted in the highest noise levels of 61.5 and 56.5 dBA SPL at PORs 1&2, which are well above the City of Ottawa By-Law Limit of 50 dBA SPL. We therefore simulated two noise mitigation solutions which are summarized below.

Operating Scenario POR1 (dBA) POR2 (dBA)

Worst-case 61.5 56.5

Option 1 49.6 47.2

Option 2 50.4 47.3 Table 8.1 – Summary of SPLs at each POR for worst-case scenario, Option 1 and Option 2.

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Option 1: Select Quieter RTUs, condensers and locate away from building edges. Only equipment in excess of 83 dBA in Table 3.1.1 are required to be reduced i.e. the RTUs in excess of 6 ton and the condensers used in our model. This is the simplest and most cost-effective solution, and is our primary recommendation.

Option 2: Use current equipment selection and construct barriers around perimeter of rooftop. If it is not possible to select quieter equipment and the equipment described above must be used, then concrete barriers can be constructed surrounding the rooftop equipment to keep the noise level at the points of reception within the by-law limit. The barriers will need to be built according to the criteria listed in Section 6. This is an expensive solution and we therefore do not recommend proceeding with this option if at all possible.

We have also examined the potential noise impact due to the loading dock and garbage compactor located on the side of the building facing Monk St. Due to the proximity of these facilities to the homes across the street we have made recommendations to minimize the noise impact by reducing the noise created and restricting operating hours. The most critical item is to select quiet mechanical equipment as this reduces the requirement for mitigation measures and will prove to be the most successful option. Some equipment may be required to be put into a mechanical penthouse if sufficiently quiet equipment cannot be selected. Once the final equipment selections and locations are confirmed, we recommend that the noise from the rooftop mechanical equipment be re-evaluated.

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Appendix A Equipment Sound Power Data

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528150-YTG-N-0912

Johnson Controls Unitary Products 135

Outdoor Sound Power Levels ZH/ZJ/ZR037-150

Size(Tons) Model Sound Rating1

dB (A)Octave Band Centerline Frequency (Hz)

63 125 250 500 1000 2000 4000 8000037(3) ZH 81 82.5 86.5 78.0 75.5 76.5 68.5 63.0 56.5

049(4) ZH 78 82.0 86.0 78.5 75.5 73.0 68.0 63.0 56.0

061(5) ZH 84 81.0 91.0 82.5 80.5 79.0 73.5 69.5 64.5

078(6.5) ZH 87 89.0 88.5 84.5 84.5 82.0 76.5 72.0 66.5

090(7.5) ZH 92 93.0 92.0 90.5 88.0 86.5 83.0 77.5 73.5

102(8.5) ZH 92 97.0 94.0 93.5 90.5 87.0 81.5 76.0 69.0

120(10) ZH 91 99.5 91.5 91.5 89.0 86.0 80.5 76.5 71.0

150(12.5) ZH 86 89.5 91.0 85.5 84.0 81.0 76.5 71.0 62.5

037(3) ZJ 77 82.0 83.5 80.0 73.0 70.0 65.5 60.5 55.5

049(4) ZJ 80 80.0 87.0 77.0 75.5 75.0 70.5 65.5 62.0

061(5) ZJ 84 86.5 87.0 86.0 79.0 76.5 71.5 68.0 64.0

078(6.5) ZJ 85 87.5 85.0 84.0 82.0 80.0 75.5 71.5 67.0

090(7.5) ZJ 90 90.0 93.0 90.5 86.0 83.5 81.5 78.0 75.0

102(8.5) ZJ 92 97.0 94.0 93.5 90.5 87.0 81.5 76.0 69.0

120(10) ZJ 91 99.5 91.5 91.5 89.0 86.0 80.5 76.5 71.0

150(12.5) ZJ 85 89.0 88.0 83.5 83.5 78.5 74.0 69.5 64.5

037(3) ZR 77 82.0 83.5 80.0 73.0 70.0 65.5 60.5 55.5

049(4) ZR 81 87.5 88.5 83.0 77.5 73.5 70.5 67.0 62.0

61(5) ZR 84 86.5 87.0 86.0 79.0 76.5 71.5 68.0 64.0

078(6.5) ZR 83 ~ 88.0 82.5 81.5 78.0 73.0 69.0 62.0

090(7.5) ZR 83 ~ 89.5 83.5 82.0 78.0 72.5 68.0 60.5

102(8.5) ZR 83 ~ 89.0 84.5 81.5 78.0 72.5 68.5 70.5

120(10) ZR 83 ~ 89.5 83.5 81.0 78.0 72.0 68.5 70.5

150(12.5) ZR 84 ~ 90.0 84.5 81.5 77.5 72.0 68.5 61.5

1. Rated in accordance with AHRI 270 standard.

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333491-YTG-G-0211

54 Johnson Controls Unitary Products

Sound Performance

Indoor Blower Specifications

Size(Tons)

ModelMotor

HP RPM Eff. SF Frame

024(2.0)

DNZDNQDNX

1/2 Variable 0.8 1.0 48

030(2.5)

DNZ 3/4 Variable 0.8 1.0 48

DNQ

036(3.0)

DNZDNQ

3/4 Variable 0.8 1.0 48

DNX 1 Variable 0.8 1.0 48

042(3.5)

DNZDNQ

3/4 Variable 0.8 1.0 48

048(4.0)

DNZDNQDNX

1 Variable 0.8 1.0 48

060(5.0)

DNZDNQ

1 Variable 0.8 1.0 48

Electric Heat Multipliers

VoltagekW Capacity Multipliers1

1. Electric heaters are rated at nominal voltage. Use this table to determine the electric heat capacity for heaters applied at lower voltages.

Nominal Applied

240208 0.75

230 0.92

480 460 0.92

600 575 0.92

Outdoor Sound Power Levels

Size(Tons)

ModelSound Rating1

dB (A)

1. Rated in accordance with ARI 270 standard.

Octave Band Centerline Frequency (Hz)

125 250 500 1000 2000 4000 8000

024(2.0)

DNZ 77 64 65.5 68 72.5 64.5 60.5 48.5

DNQ 80 66 70.5 74 74.5 72.5 67.5 64.5

DNX 80 66 70.5 74 74.5 72.5 67.5 64.5

030(2.5)

DNZDNQ

74 63.5 64.5 66.5 67 63 57.5 51.5

036(3.0)

DNZ 74 66.5 66.5 69.5 68 63 59 49.5

DNQ 79.5 69 71.5 74 74 70.5 67 61

DNX 80 70.5 71 74.5 74 71 67.5 64

042(3.5)

DNZDNQ

79 70 70.5 73.5 73 69.5 67 66

048(4.0)

DNZ 79 70.5 71 73.5 73 70 66 66

DNQ 80 71.5 71.5 73.5 74 69.5 65 63.5

DNX 81 72.5 73 76 75.5 71 67.5 65

060(5.0)

DNZ 80 73 71.5 74.5 75 70.5 67 62.5

DNQ 81 73.5 73 76 75.5 71 66.5 61.5

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251933-YTG-P-0311

Johnson Controls Unitary Products 61

Sound Performance

ZF/ZR/XP Indoor Sound Power Levels

Size(Tons)

CFMESP

(IWG)Blower

Sound Power, dB (10-12) Watts

Sound Rating1

dB (A)

1. These values have been accessed using a model of sound propagation from a point source into the hemispheric/free field. The dBA values provided are to be used for reference only. Calculation of dBA values cover matters of system design and the fan manufacture has no way of knowing the details of each system. This constitutes an exception to any specification or guarantee requiring a dBA value of sound data in any other form than sound power level ratings.


RPM BHP 63 125 250 500 1000 2000 4000 8000

036(3.0)

1200 0.2 630 0.41 63 82 77 59 50 43 42 40 45

048(4.0)

1600 0.2 791 0.54 72 95 84 58 54 46 44 45 44

060(5.0)

2000 0.2 840 0.67 62 84 71 58 53 50 49 49 49

072(6.0)

2200 0.3 920 1.45 76 61 71 68 67 72 66 61 54

ZF/ZR Outdoor Sound Power Levels

Size(Tons)

Sound Rating1

dB (A)



63 125 250 500 1000 2000 4000 8000

036(3.0)

81 87.5 86.0 81.0 77.0 75.0 69.5 65.5 70.5

048(4.0)

80 84.5 81.0 80.0 78.0 75.0 70.0 67.0 70.5

060(5.0)

82 86.5 87.5 81.5 77.5 75.0 71.5 68.0 70.5

XP Outdoor Sound Power Levels

Size(Tons)

Sound Rating1

dB (A)



63 125 250 500 1000 2000 4000 8000

036(3.0)

76 83.5 84.5 76.5 72.0 68.0 66.0 60.0 56.0

048(4.0)

80 85.0 83.0 81.0 77.5 75.5 71.5 67.5 61.5

060(5.0)

80 86.0 84.0 81.0 77.0 75.5 71.0 66.5 60.5

jthorbahn

Rectangle

Sound Data

350DFEG 60Hz

Sound Pressure Level @ 7 meters, dB(A)

See Notes 1-8 listed below Configuration Measurement Location Number Average 1 2 3 4 5 6 7 8

Standard - Unhoused Infinite Exhaust 88 92 92 91 86 91 89 92 90

F183-Residential Muffler Mounted Muffler 88 90 89 88 87 87 87 89 88

F200–Weather

Mounted Muffler 87 88 82 85 86 85 82 88 86

F201 - Quiet Site II First Stage Mounted Muffler 89 87 82 80 77 78 80 87 85

F202 - Quiet Site II Second Stage

Mounted Muffler 71 71 70 71 72 72 73 72 72

Sound Power Level, dB(A) See Notes 2-6, 9, 10 listed below

Configuration Octave Band Center Frequency (Hz) Overall Sound Power Level 63 125 250 500 1000 2000 4000 8000

Standard - Unhoused (Note 3) Infinite Exhaust 80 97 103 108 110 111 110 108 117

F183-Residential Muffler Mounted Muffler 103 113 112 110 108 107 100 99 118

F200–Weather

Mounted Muffler 102 108 102 106 108 107 104 98 114

F201 - Quiet Site II First Stage Mounted Muffler 102 108 101 104 107 105 103 96 113

F202 - Quiet Site II Second Stage Mounted Muffler 82 91 92 94 95 97 94 86 102

Exhaust Sound Pressure Level @ 1 meter, dB(A) Open Exhaust (No Muffler Rated Load)

Octave Band Center Frequency (Hz) Sound Pressure Level 63 125 250 500 1000 2000 4000 8000

90 106 109 107 109 110 111 105 117.1 Note:

1. Position 1 faces the engine front. The positions proceed around the generator set in a counter-clockwise direction in 45° increments. All positions are at 7m (23 ft) from the surface of the generator set and 1.2m (48”) from floor level.

2. Sound levels are subject to instrumentation, measurement, installation and manufacturing variability. 3. Sound data with remote-cooled generator sets are based on rated loads without cooling fan noise. 4. Sound levels for aluminum enclosures are approximately 2 dB(A)s higher than listed sound levels for steel enclosures. 5. Sound data for generator set with infinite exhaust do not include exhaust noise. 6. Data is based on full rated load with standard radiator-cooling fan package 7. Sound Pressure Levels are measured per ANSI S1.13 and ANSI S12.18, as applicable. 8. Reference sound pressure is 20 µPa. 9. Sound Power Levels per ISO 3744 and ISO 8528-10, as applicable.

10. Reference power = 1 pw (10-12

11. W)

Exhaust Sound Pressure Levels are per ISO 6798, as applicable. Cummins Power Generation Data and Specification Subject to Change Without Notice Bulletin msp-186j

n45 architecture inc. environmental noise impact study

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