R E P O R T W R G 3 9 6 D I N E N 1 3 1 4 1-7 Test laboratory Test object Customer Scope of assignment TÜV SÜD Industrie Service GmbH Center of Competence for Refrigeration and Air Conditioning Air Conditioning and Ventilation Central ventilation unit with heat recovery type SMARTY 3X P of the company UAB SALDA UAB SALDA Ragainės g.100 ŠIAULIAI LT 78109 LITHUANIA Tests according to DIN EN 13141-7:2011-01 Date: 2015-08-18 Our reference: IS-TAK3-MUC/mr Document: wrg396 Salda Smarty 3XP REPORT EN 13141-7-150818- mrkl.docx Date of receipt of test object 2015-05-19 Test period 2015-05-19-2015-07-16 Test location Expert Munich Nuremberg Heiko Mirring / Thomas Busler Test specification DIN EN 13141-7:2011-01 DIN EN ISO 5801:2011-11 DIN EN 308:1997-06 This document consits of 11 Pages + 30 Appendices Page 1 of 11 Excerpts from this document may only be reproduced and used for advertising purposes with the express written approval of TÜV SÜD Industrie Service GmbH. The test results refer exclusively to the units under test.. Headquarters: Munich Trade Register Munich HRB 96 869 VAT ID No. DE129484218 Information pursuant to Section 2(1) DL-InfoV (Germany) at www.tuev-sued.com/imprint Supervisory Board: Karsten Xander (Chairman) Board of Management: Ferdinand Neuwieser (CEO), Dr. Ulrich Klotz, Thomas Kainz Phone: +49 89 5190-3165 Fax: +49 89 5155-1069 www.tuev-sued.de/is TÜV SÜD Industrie Service GmbH Center of Competence for Refrigeration and Air Conditioning Air Conditioning and Ventilation Ridlerstrasse 65 80339 Munich Germany
Page 2 of 11 1. Scope of testing The company UAB SALDA ordered tests to be conducted on a ventilation unit with heat recovery type SMARTY 3X P in accordance with the standard DIN EN 13141-7:2011-01. 2. Description of the ventilation unit type SMARTY 3X P The structure of the ventilation unit with heat recovery is pictured in figure 1. external preheater Extract air G4 F7 Outdoor air Supply air Exhaust air Summer Bypass Figure 1: Schematic diagram of the central ventilation unit with heat recovery, type SMARTY 3X P of the company UAB SALDA Images of the ventilation unit with heat recovery are shown in Appendices A. Data pertaining to the tested ventilation unit and its built-in components are listed in Appendices B. The operation range declared by the manufacturer of the ventilation unit is limited to new and redeveloped single-family houses. It is possible to install the ventilation unit on the ceiling or horizontally on the wall. Exhaust air condensate can be discharged through an open drainage.
Page 3 of 11 3. Procedure of the tests The tests were performed at the test facilities of the Center of Competence for Refrigeration and Air Conditioning of the TÜV SÜD Industrie Service GmbH. The tests comprise the reception inspection, the tightness tests, the ventilation tests, the thermodynamic tests, a cold climate test and acoustic tests. The acoustic tests were performed at the Test lab No. DGA-PL-1524.11 A list of the used measurement equipment is deposited at the test centre. 3.1. Reception inspection The relevant technical data of the ventilation unit were recorded during the reception inspection. 3.2. Leakage test 3.2.1. External leakage test The external leakage of the ventilation unit was determined by means of establishing a pressure difference between the interior of the unit and its environment. The measured air volume flow required to maintain the pressure difference constitutes the external leakage. 3.2.2. Internal leakage test In order to determine the leakage volume flow between the exhaust air / extract air side and the outdoor air / supply air side, the exhaust air / extract air side of the unit were pressurised and a volume flow was supplied to or extracted from the outdoor air / supply air side, so as to keep the differential pressure between the environment and the outdoor air / supply air side at zero. As there is no differential pressure between the environment and the outdoor air / supply air side, the leakage volume flow corresponds to the ingoing or outgoing volume flow which exists when the specified differential pressures are adjusted.
Page 4 of 11 3.3. Ventilation test The ventilation test was conducted with a test chamber in accordance with the standard DIN EN ISO 5801:2012-11. The air temperature during the test was 21 C +/- 2 K. The measurement of the air flows was done at both airflow directions simultaneously at the same pressure level. The measured air flow curves include the following working points: q min at 50 Pa 0.7 x q vd at 50 Pa q vd at 100 Pa The recorded real electric power consumption values relate to the entire unit and are not corrected by the density of the air. The specific power input of the ventilation unit was related to the supply air flow. 3.4. Filter-bypass leakage By the reception inspection, the filter bypass leakage will be visually checked. The filter and the filter frame shall be constructed in order to achieve an easy change of the filter and a tight fitting of the filter. The tight fitting of the filter shall not be influenced by humidity. 3.5. Thermodynamic test The thermodynamic test was conducted in a double climate chamber. The data pertaining to the incoming and outgoing airflow (temperature, humidity, air volume flow) and the total real electric power consumption of the ventilation unit were recorded at the system boundaries of the central ventilation unit. Hereby the caloric mean temperature 1 was determined in accordance with the standard DIN EN 308:1997-07. The entrance of the extract air into and the outlet of the exhaust air, as well as the entrance of the outdoor air into and the outlet of the supply air of the ventilation unit, were defined as system boundaries. A scheme of the thermodynamic test setup is shown in Figure 2. 1 The caloric mean temperature describes the mean temperature of the temperature probes at the system boundaries of the unit, which is the basis for the calculation of the energy content of the air flows.
Page 5 of 11 Symbols: Group 1 Measuring device Group 2 Measuring device F Volume flow R Recording T Temperature E Electrical Data X Humidity P Static pressure Figure 2: Scheme of the thermodynamic test The thermodynamic tests were performed at the following conditions: Symbol Condition 1 Condition 2 Outdoor air dry bulb temperature t 21 7 C 2 C Outdoor air wet bulb temperature twb 21-1 C Extract air dry bulb temperature t 11 20 C 20 C Extract air wet bulb temperature twb 11 12 C 15 C Here the following air flows and external static pressures were preset: q min 70 m³/h at 50 Pa 0.7 x q vd 245 m³/h at 50 Pa q vd 350 m³/h at 100 Pa
Page 6 of 11 3.6. Cold Climate test The cold climate test was done with an external electrical preheater. The cold climate test was carried out following the thermodynamic test. Here, the outside air temperature, starting from 2 C, is gradually decreased and determines the switch-on temperature frost protection strategy. In addition, the effectiveness of the frost protection strategy was investigated within the scope of a cycle test. The test was carried out with the reference volume flow 0.7 x q vd and under the following conditions: Symbol Condition Outdoor air dry bulb temperature t 21-15 C Outdoor air wet bulb temperature twb 21 - Extract air dry bulb temperature t 11 20 C Extract air wet bulb temperature twb 11 10 C 3.7. Acoustic tests The acoustic tests were performed in a reverberation room. The tests were conducted out at the following operating point. 0,7 x q vd 245 m³/h at 50 Pa The radiated sound power of the unit and the sound power of the connecting ducts were measured according to the DIN EN ISO 3743-1: 2011-01.
Page 7 of 11 4. Test results 4.1. Reception inspection The identified relevant technical data of the ventilation unit and its installed components are listed in Appendices B. The visual inspection of the central ventilation unit yielded the following results: - Unit labelling - The unit was equipped with a type plate. - The unit is marked with a CE sign. - Electrical safety - The electrical parts are accessible if the cover of the unit was open. - Tools are required for opening the unit cover. - There was an indication label placed at the cover of the ventilation unit which should warn of electrical parts under voltage inside of the unit. - Mechanical safety - Tools are required for opening the unit cover. - Operation and installation - The unit can operated by control panels of the types Ptouch, Stouch or by Mod Bus gateway (MB Gateway). - With the control panel type Ptouch it is possible to set up further service applications on the ventilation unit. - The Stouch control panel is only used to switch between the four available fan speeds - About the MB Gateway it is possible to adjust the parameters of the device via web browser. This variant was used to conduct the tests. - The device controllers are equipped with four different fan speeds to which different fan voltages can be assigned. - To balance the two air flow rates it is possible to adjust different voltages on the fans. - Maintenance - The filters are situated at the outdoor and extract side. They can be removed over the Filter access panels. - The unit was equipped with a run time based filter control. At the end of the adjustable time interval, the user will be informed through the control panel of the unit.
Page 8 of 11 4.2. Tightness test The results of the external and internal tightness test are listed in Appendix C. The maximum declared air volume flow (q vd ) of the ventilation unit is 350 m³/h. The leakage related to the maximum declared air volume flow is: -250 Pa +250 Pa Leakage class external leakage F7 / G4 0.7 % 0.7 % A1 Filtercombination Filtercombination -100 Pa +100 Pa Leakage class internal leakage F7 / G4 0.7 % 0.7 % A1 According to the standard DIN EN 13141-7:2011-01, the leakage class is A1. 4.3. Ventilation test The pressure-airflow curves of the exhaust air / extract airside and the outdoor air / supply air side are shown in Appendices D. The values measured in the ventilation test are listed in Appendices E. 4.4. Filter-bypass leakage The tight fitting of the filter was checked by a visual inspection. The material of the filter is water-repellent. 4.5. Thermodynamic test Thermodynamic test points are shown in Appendix F. The measurements and calculated values from the thermodynamic test are listed in Appendix G.
Page 9 of 11 4.6. Cold climate test The tests to describe the behavior of the ventilation unit in frost protection case were carried out with an electric preheater. The outdoor air temperature the cold climate strategy was activated was approximately -6.0 C with electric preheating. The cycle tests to verify the effectiveness of frost protection carried out at an outdoor air temperature of approximately -15 C showed that the frost protection strategies are effective. A description of the frost protection strategy is given in Appendix H. Diagrams illustrating the test sequence are shown in Appendix I. 4.7. Acoustic tests The results of the acoustic tests are shown in Appendix J. 5. Summary 5.1. Reception inspection The unit was equipped with a type plate and marked with a CE sign. The fans are situated on the exhaust air side and the supply air side. The unit was equipped with a runtime based filter control 5.2. Tightness test The leakage class according to the standard DIN EN 13141-7:2011-01 is A1. 5.3. Ventilation test The pressure-airflow curves of the exhaust air / extract airside and the outdoor air / supply air side are shown in appendices D. The values measured in the ventilation test are listed in Appendices E.
Page 10 of 11 5.4. Filter-bypass leakage The tight fit of the filter was checked by a visual inspection. The material of the filter is water-repellent. 5.5. Thermodynamic test For the ventilation unit the following type specific data were determined: (see also Appendices G): Temperature ratio related to supply Air volume flow side η θ,su in % Θ outdoor air = 7 C Θ outdoor air = 2 C q min 93.6 94.1 0.7 x q vd 87.2 89.6 q vd 86.0 88.0 Spezific elect. power input p el in Air volume flow W/(m³/h) 2 Θ outdoor air = 7 C Θ outdoor air = 2 C q min 0.30 0.30 0.7 x q vd 0.27 0.28 q vd 0.41 0.44 5.6. Cold climate test The outdoor air temperature the cold climate strategy was activated was approximately -6.0 C with electric preheating. The cycle tests to verify the effectiveness of frost protection carried out at an outdoor air temperature of approximately -15 C showed that the frost protection strategies are effective. 2 To determine the specific power input, the average of the supply and extract air flow rate was used.
Page 11 of 11 5.7. Acoustic tests The results of the acoustic tests are shown in Appendix J. Center of Competence for Refrigeration and Air Conditioning Expert Andreas Klotz Heiko Mirring Appendices Appendices A1 to A16 Appendices B1 to B3 Appendix C Appendices D1 and D2 Appendices E1 and E2 Appendix F Appendix G1 and G2 Appendix H Appendix I Appendix J Images of the test sample Data pertaining to the tested unit Results of the tightness tests Pressure-airflow curves Measurements from the ventilation test Thermodynamic test points Measurements and calculated values from the thermodynamic test Description of the cold climate strategy Diagram of the cold climate test Results of the acoustic tests
Appendix A1 Images of the test sample Figure A-1: Drawing of the ventilation unit
Appendix A2 Images of the test sample EXT EXH SU AU Figure A-2: View from the top of the ventilation unit OA EXH Figure A-3: View from the side of the ventilation unit
Appendix A3 Images of the test sample EXT SU Figure A-4: View from the side of the ventilation unit Figure A-5: View from the top of the ventilation unit without cover
Appendix A4 Images of the test sample Figure A-6: View from the top of the ventilation unit without cover, condensation tray and filters Figure A-7: View from the top of the ventilation unit without cover, condensation tray, filters and heat exchanger cell
Appendix A5 Images of the test sample Figure A-8: View from the top of the ventilation unit without cover, condensation tray, filters and heat exchanger cell (view 2) Figure A-9: Cover of the ventilation unit
Appendix A6 Images of the test sample Figure A-10 Outdoor air filter (class F7) of the ventilation unit Figure A-11: Extract air filter (class G4) of the ventilation unit
Appendix A7 Images of the test sample Figure A-12: Supply air fan of the ventilation unit Figure A-13: Type plate of the supply air fan
Appendix A8 Images of the test sample Figure A-14: Exhaust air fan of the ventilation unit Figure A-15: Type plate of the exhaust air ventilator
Appendix A9 Images of the test sample Figure A-16: Condensate tray of the air ventilation unit Figure A-17: Fastener of the heat exchanger
Appendix A10 Images of the test sample Figure A-18: View from the top of the heat exchanger Figure A-19: View from the side of the heat exchanger
Appendix A11 Images of the test sample Figure A-20: Motor of the summer bypass of the ventilation unit Figure A-21: Summer bypass of the ventilation unit
Appendix A12 Images of the test sample Figure A-22: External electrical preheater of the ventilation unit with opened front cover Figure A-23: External electrical preheater of the ventilation unit with
Appendix A13 Images of the test sample Figure A-24: Exhaust air temperature sensor of the ventilation unit Figure A-25: Supply air temperature sensor of the ventilation unit
Appendix A14 Images of the test sample Figure A-26: Electrical assembly of the ventilation unit Figure A-27: Type plate of the ventilation unit
Appendix A15 Images of the test sample Figure A-28: S-touch controller of the ventilation unit Figure A-29: P-touch controller of the ventilation unit
Appendix A16 Images of the test sample Figure A-30: Mod Bus Gateway of the ventilation unit
Appendix B1 Data pertaining to the tested unit Specifications according to ventilation unit's type plate Manufacturer: Type: Address of the company: Voltage: Current consumption: Serial number: SALDA SMARTY 3X P no Information 230 V / 50 Hz 0.75 A Gu190686 Year of production: 2015-05 Weight: no declaration Dimensions of the ventilation unit (Test laboratory indications) Width Height Depth 1220 mm 686 mm 317 mm
Appendix B2 Data pertaining to the tested unit Filter Type Quantity Filter class Dimensions Outdoor air filter: 1 F7 225 mm x 195 mm x 25 mm Extract air filter: 1 G4 225 mm x 195 mm x 25 mm Exhaust fan Quantity: 1 Design: backwarth curved Manufacturer: epm papst Type: R3G190-RC05-03 Voltage/Frequency: 200 V-240 V / 50 Hz-60 Hz Current consumption: 0.75 A Real power consumption: 83 W Speed: 3200 min -1 Charge 28/14 Supply fan Quantity: 1 Design: backwarth curved Manufacturer: epm papst Type: R3G190-RC05-03 Voltage/Frequency: 200 V-240 V / 50 Hz-60 Hz Current consumption: 0.75 A Real power consumption: 83 W Speed: 3200 min -1 Charge 28/14
Appendix B3 Data pertaining to the tested unit Heat exchanger Quantity: 1 Design: cross counter flow Material: aluminium Manufacturer: Klingenburg Type: no declaration Serial No.: no declaration Humidity recovery: No Dimensions: Width 230 mm Length 1 453 mm L2 L1 Length 2 Depth 247 mm 450 mm Width Plate spacing 0.42 mm Air connections Extract air: DN 160 Exhaust air: DN 160 Outdoor air: DN 160 Supply air: DN 160
Appendix C Results of the tightness test The leakage related to the maximum declared air volume flow of 350 m³/h is: Measurement P stat external leakage leakage volume flow leakage internal leakage leakage volume flow leakage Nr. [Pa] [m³/h] % [m³/h] % 1-400.0 - - - - 2-300.0 2.8 0.8 5.1 1.5 3-250.0 2.5 0.7 - - 4-200.0 2.1 0.6 4.0 1.1 5-100.0 1.2 0.4 2.6 0.7 6-50.0 0.7 0.2 1.7 0.5 7 0.0 0.0 0.0 0.0 0.0 8 50.0 0.7 0.2 1.5 0.4 9 100.0 1.3 0.4 2.5 0.7 10 200.0 2.2 0.6 3.9 1.1 11 250.0 2.6 0.7 - - 12 300.0 2.9 0.8 4.9 1.4 13 400.0 - - - -
Appendix D1 Pressure-airflow curves (extract air) = 1.2 kg/m ³ 350 300 250 stat. pressure [Pa] 200 150 100 q vmin 0.7 x q vd q vd 50 0 0 100 200 300 400 air volume flow [m³/h]
Appendix D2 Pressure-airflow curves (supply air) = 1.2 kg/m ³ 350 300 250 stat. pressure [Pa] 200 150 100 q vmin 0.7 x q vd q vd 50 0 0 100 200 300 400 air volume flow [m³/h]
Appendix E1 Measurements from the ventilation test q vmin with the parameter: 19.6 % at the supply fan and 20 % at the exhaust fan p stat. SU-OU p stat. EXT-EXH spec. el. power input P el = 1,2 kg/m³ supply = 1,2 kg/m ³ extract p el [Pa] [m³/h] [Pa] [m³/h] [W] [W/(m³/h)] 3 1 0.6 77.8 1.8 82.2 16.7 0.21 2 5.1 76.7 4.2 80.6 17.1 0.22 3 9.1 76.0 14.1 76.7 17.8 0.23 4 24.5 71.3 22.8 73.5 18.6 0.26 5 37.9 70.2 43.0 69.3 20.5 0.29 6 76.9 70.4 79.3 71.0 24.8 0.35 7 101.8 70.0 104.9 70.4 27.8 0.40 8 120.4 67.6 124.2 67.7 30.1 0.44 9 144.5 64.0 146.5 67.6 33.0 0.52 10 172.2 60.5 176.7 65.4 36.7 0.61 11 212.3 55.8 216.9 65.3 41.9 0.75 12 256.6 47.4 254.2 63.2 47.4 1.00 0,7xq vd with the parameter: 67.9 % at the supply fan and 69.1 % at the exhaust fan p stat. SU-OU p stat. EXT-EXH spec. el. power input P el = 1,2 kg/m³ supply = 1,2 kg/m ³ extract p el [Pa] [m³/h] [Pa] [m³/h] [W] [W/(m³/h)] 3 1 0.0 246.7 0.0 255.4 55.9 0.22 2 18.4 246.9 20.5 254.1 61.0 0.25 3 33.9 247.4 28.9 254.6 64.1 0.26 4 45.8 245.8 50.5 249.8 66.2 0.27 5 53.4 246.7 57.4 249.7 70.1 0.28 6 60.9 249.4 61.9 252.0 72.0 0.29 7 82.7 249.8 78.1 250.9 76.3 0.31 8 101.6 249.3 101.7 248.7 81.3 0.33 9 118.8 249.9 117.1 249.4 85.3 0.34 10 143.8 249.9 141.2 245.4 91.7 0.37 11 158.4 249.7 156.0 241.6 95.8 0.38 12 186.3 250.4 181.5 240.3 108.3 0.43 13 219.3 250.8 216.7 233.3 111.7 0.45 14 257.2 250.7 253.1 228.3 121.9 0.49 15 318.3 251.1 313.4 223.5 139.4 0.56 3 The specific power input of the ventilation unit was related to the supply air flow. p el = power input of the unit / supply air flow.
Appendix E2 Measurements from the ventilation test q vd with the parameter: 100 % at the supply fan and 90.5 % at the exhaust fan p stat. SU-OU p stat. EXT-EXH spec. el. power input P el = 1,2 kg/m³ supply = 1,2 kg/m ³ extract p el [Pa] [m³/h] [Pa] [m³/h] [W] [W/(m³/h)] 3 1 0.0 361.5 0.0 359.1 116.9 0.32 2 15.5 362.3 14.6 358.3 122.9 0.34 3 20.9 360.5 15.9 358.8 122.6 0.34 4 49.2 361.9 44.5 357.8 132.8 0.37 5 62.9 361.2 65.6 355.3 138.1 0.38 6 83.0 359.5 80.4 354.1 144.5 0.40 7 95.6 354.6 99.6 353.9 147.8 0.42 8 98.7 352.5 98.5 353.2 149.8 0.43 9 102.6 352.5 101.7 353.9 149.1 0.42 10 121.8 343.8 121.4 349.5 152.2 0.44 11 140.9 335.1 141.9 347.7 153.6 0.46 12 159.3 328.1 161.1 346.2 156.7 0.48 13 179.9 320.4 178.8 345.3 160.7 0.50 14 192.5 314.9 197.0 346.2 160.9 0.51 15 213.1 306.6 217.9 344.5 166.8 0.54 16 243.3 293.8 248.6 345.6 175.3 0.60 17 284.3 277.4 279.0 341.8 172.1 0.62 18 301.7 271.0 297.0 331.4 176.3 0.65 3 The specific power input of the ventilation unit was related to the supply air flow. p el = power input of the unit / supply air flow
Appendix F Thermodynamic test points = 1.2 kg/m ³ 350 Supply air Extract air P el 200.0 180.0 300 160.0 250 140.0 static pressure [Pa] 200 150 100 test point at q vmin test point at 0.7 x q vd test point at q vd 120.0 100.0 80.0 60.0 effective power input [W] 40.0 50 20.0 0 0.0 0 100 200 300 400 volume flow [m³/h]
Appendix G1 Measurements and calculated values from the thermodynamic test
Appendix G2 Measurements and calculated values from the thermodynamic test
Appendix H Description of the frost protection strategy The ventilation unit can be equipped with an external electrical preheater with an effective power input of 1200 W. The preheater was located on the suction side of the outdoor air fan. To regulate the frost protection of the air ventilation unit the activation Temperature of the frost protection (AF_SET) and the limits of integration (AF_DEACTIVATION_DIFF and AF_MAX_DIFF) have to be specified in the controller of the unit. The controller is comparing the activation Temperature (AF_SET) to the outside air temperature inside of the ventilation unit (T_OUT). If the current temperature (T_OUT) is on a lower level than the setting of the activation temperature on the outdoor air side (AF_SET) the controller starts with the second by second summation of the temperature difference between the activation temperature and the current temperature on the outdoor air side. If the value of the summation is greater than the value set under (AF_MAX_DIFF) the frost protection is activated. Activating the frost protection device increases the outside air temperature and also the current value of the summation. The frost protection remains activated as long as the value of the summation is equal or higher than the value set under (AF_DEACTIVATION_DIFF), which must be lower than the value set under (AF_MAX_DIFF). During the tests the following values were set in the controller of the unit. Variables: AF_SET Heat exchanger s anti-frost Set Point 5.5 C AF_DEACTIVATION_DIFF difference of anti-frost de activation temperature from activation temperature 13000 T_OUT Outdoor air temperature (preheated) current AF_MAX_DIFF MAX difference between AF_SET and T_OUT 10000
Appendix I Diagram of the cold climate test with electrical heater
Appendix J Results of the acoustic tests Environmental conditions: rel. humidity: 53 % barometric pressure: 980 hpa air temperature: 24 C voltage: 230 V centre frequency [Hz] sound power level [db] exhaust outdoor air extract supply unit 100 46.7 37.1 37.4 49.9 36.7 125 46.3 51.7 40.6 44.5 37.5 43.1 49.4 54.3 40.0 44.4 160 47.6 40.8 39.5 49.3 41.5 200 50.3 42.9 44.0 49.8 43.3 250 66.6 67.1 53.7 55.2 52.0 53.9 64.7 66.5 46.7 51.3 315 51.5 47.9 47.1 61.1 48.8 400 51.4 41.6 43.8 55.6 42.3 500 58.4 60.2 44.2 46.7 42.8 47.2 56.8 60.9 46.5 49.2 630 53.1 38.0 39.8 55.8 43.4 800 48.4 35.6 33.1 51.7 38.6 1000 50.4 53.6 31.1 37.6 32.3 36.6 52.9 56.4 37.7 42.2 1250 46.7 26.9 27.9 49.2 34.1 1600 45.4 26.6 27.5 48.2 31.5 2000 44.4 49.7 25.9 30.3 28.2 32.3 49.4 53.3 31.5 35.9 2500 45.0 23.7 26.8 48.0 30.3 3150 39.7 17.6 20.1 40.8 23.3 4000 40.9 44.2 16.1 20.9 16.8 22.6 41.1 45.3 21.2 27.1 5000 36.4 14.5 14.8 39.1 22.2 6300 31.2 15.3 15.5 36.1 21.3 8000 26.3 33.3 17.3 21.4 17.3 21.5 30.8 38.2 20.4 25.2 10000 22.9 19.5 19.5 26.7 21.0 L W 68.0 56.0 55.0 68.1 54.4 L WA 61.9 48.8 48.1 63.1 49.4 static pressure 52 Pa 51 Pa 50 Pa 51 Pa 49 Pa (AU/ZU) 50 Pa (AB/FO) air volume flow OU - 243 m³/h 242 m³/h SU 245 m³/h 243m³/h - - 245 m³/h EXH 246 m³/h 244 m³/h 246 m³/h EXT 247 m³/h 245 m³/h with L W L WA sound power level A-weighted sound power level Sound power levels written bold indicate a difference between background noise and noise of source under test below 6 db. The accuracy of those results is reduced. The stated value is the upper bound for the sound power level.