1、Designation: E3087 17E3087 18Standard Test Method forMeasuring Capture Efficiency of Domestic Range Hoods1This standard is issued under the fixed designation E3087; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last r
2、evision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method measures the capture efficiency of wall-mounted domestic range hoods under controlled conditions in atest c
3、hamber.1.2 This test method applies to range hoods that exhaust air to outside and does not apply to recirculating range hoods.1.3 This test method only applies to range hood air flows up to 200 L/s and widths up to 0.91 m (36 in.).1.4 This test method is intended to quantify the capture efficiency
4、of range hoods under controlled laboratory conditions suitablefor rating.1.5 The values stated in SI units are to be regarded as standard. If a value for measurement is followed by a value in other unitsin parentheses, the second value may be approximate. The first stated value is the requirement.1.
5、6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability ofregulatory limitations prior to use.1.7
6、 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade
7、 (TBT) Committee.2. Referenced Documents2.1 ASTM Standard:2E631 Terminology of Building Constructions2.2 Other Standards:HVI Publication 916 HVI Airflow Test Procedure3ASHRAE 51/AMCA 210 Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating4IEC 61591 Household range hoods -
8、 Methods for measuring performance53. Terminology3.1 Definitions: For definitions used in this test method not otherwise defined below, refer to Terminology E631.3.1.1 capture effciency, nthe fraction of emitted tracer gas that is directly exhausted by the range hood to be tested.3.1.2 range hood, n
9、a device for capturing cooking-generated contaminants over a stove, range or cooktop, and exhausting thecontaminants to outside the building.4. Summary of Test Method4.1 This method measures the capture efficiency of a range hood using tracer gas techniques in a defined test chamber.4.2 A tracer gas
10、 is emitted at the test surface at a fixed rate with the range hood to be tested operating at specified conditions.1 This test method is under the jurisdiction ofASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.41 on Air Leakageand Ventilation Perfo
11、rmance.Current edition approved Oct. 1, 2017Oct. 1, 2018. Published November 2017October 2018. Originally approved in 2017. Last previous edition approved in 2017 asE308717. DOI: 10.1520/E3087-17.10.1520/E308718.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Cust
12、omer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from Home Ventilating Institute (HVI), 1740 Dell Range Blvd., Ste. H, PMB 450, Cheyenne, WY 82009, http:/www.hvi.org.4 Available from Ame
13、rican Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA 30329,http:/www.ashrae.org.5 Available from International Electrotechnical Commission (IEC), 3, rue de Varemb, 1st Floor, P.O. Box 131, CH-1211, Geneva 20, Switzerland, http:/w
14、ww.iec.ch.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult
15、 prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.3 The concentration of the tracer ga
16、s in the exhaust stream of the range hood, the test chamber and air entering the testchamber are measured and used to determine the capture efficiency under steady-state conditions.5. Significance and Use5.1 Cooking can be one of the most polluting activities commonly and regularly occurring in resi
17、dential environments.Capturing airborne cooking contaminants before they can mix with the indoor air is a critical indoor air quality control method.5.2 Range hoods are used in homes to remove cooking-generated contaminants above cooking surfaces before they mix withair in the rest of the house. Thi
18、s test method is used to measure the capture efficiency under specific conditions that permitcomparisons and ratings of range hoods.5.3 Range hoods may be manufactured and intended to operate at different flow rates or using different inserts such as filters.This test method may be used to determine
19、 capture efficiency over the range of rated air flows and operating configurations of arange hood. The rated air flows shall be listed and shall be tested in accordance with HVI Test Procedure 916, IEC 61591,ASHRAE 51/AMCA 210, or equivalent. The maximum air flow allowed for this test method is 200
20、L/s.6. Apparatus for Wall-Mounted Range Hoods6.1 Test Chamber:6.1.1 The capture efficiency testing shall be performed inside a test chamber. The chamber shall have minimum wall lengthsof 2.5 m and 3.5 m. The wall height shall be 2.4 to 2.5 m. The volume (V) of the test chamber shall be calculated. A
21、 sketch ofthe test chamber is shown in Fig. 1Figs. 1-3, together with an example 0.75 m (30 in. nominal) wide range hood.6.1.2 The test chamber air leakage shall be measured with intentional inlets and outlets sealed and any access doors or panelsclosed. Intentional inlets and outlets include the ra
22、nge hood exhaust duct. The test chamber shall be pressurized to 50 Pa. The airflow required to maintain this pressure (Q50 (L/s) shall be measured and recorded. This flow shall be converted into Air Changesper Hour using Eq 1:Air Changes per Hour53.63Q50V (1)The test chamber shall have less than 2.5
23、 Air Changes per Hour at 50 Pa leakage.6.1.3 The test chamber shall have one or more air inlets in the test chamber.6.1.3.1 The air inlets shall be sized so that the maximum air flow through the range hood depressurizes the test chamber by lessthan 5 Pa.FIG. 1 Sketch of Example Test Chamber - Sectio
24、nE3087 182FIG. 2 Sketch of Example Test Chamber - ElevationFIG. 3 Sketch of Example Test Chamber - PlanE3087 1836.1.3.2 The inlets shall be constructed so that the air coming through them will not directly impinge on the range hood or tracergas emitters, incoming air is directed away from the wall w
25、here the range hood is mounted, and there is at least a 1 m separationbetween the air inlet and the range hood being tested or the cooktop, or both.6.1.3.3 The inlets shall be sized to have an average inlet velocity less than 0.5 m/s. A diffuser shall be used on the air inlets toensure uniform air f
26、low entering the test chamber. The inlets shall be constructed such that air flow does not impinge directly onthe range hood being tested or on the area between the range hood and the cooktop.6.1.4 The range hood to be tested shall be installed on the longest wall of the test chamber. Cabinetry shal
27、l be installed on bothsides of the range hood that extends laterally at least 0.5 m and has a depth of 0.3 to 0.4 m. The cabinetry shall be mounted totouch the ceiling and extend down vertically 1 to 1.1 m. No cabinets shall be installed above the range hood.6.1.5 Acountertop shall be installed belo
28、w the range hood and cabinets, with its upper surface 0.9 m (60.025 m) from the floor.The gap between the countertop and the floor shall be completely filled by kitchen cabinets or solid materials to simulate kitchencabinetry. The countertop shall extend to at least 0.5 m on each side of the range h
29、ood and have a depth from the wall of0.65 m.0.65 m (60.025 m).6.2 Electric Heating Elements, Tracer Gas Emitters, and Tracer Gas Sample Locations:6.2.1 Each electric heating element shall be 200 6 10 mm in diameter. The average power input for each electric heatingelement during the test shall be 1.
30、0 6 0.1 kW. For 0.61 m (24 in. nominal) and 0.75 m (30 in. nominal) wide range hoods, electricheating elements shall be coil elements (not induction or hot plate). For hoods up to 0.75 m (30 in. nominal) wide, twonon-induction electric surface heating elements shall be used for testing. For 0.90 m (
31、36 hoods greater than 0.75 m (30 in. nominal)range hoods, three non-induction electric surface heating elements shall be used for testing.6.2.2 A plume diffusion/tracer gas emitter assembly (see Fig. 4) shall be provided for each electric heating element. Theassembly emitter assembly shall be placed
32、 directly on top of and in contact with the electric heating element.The assembly consistsof two circular metal plates of unpolished aluminum or steel and an injector array. Each plate shall have a diameter of 250 6 5mm and a thickness of 13 6 1 mm. Metal spacers shall be placed between the plates t
33、o maintain a gap of 13 6 1 mm. The emitterarray shall emit tracer gas evenly over both the upper and lower surface of the top plate via holes 3.5 mm in diameter. For the uppersurface, a minimum of 30 holes is required. For the lower surface, a minimum of 15 holes is required.An illustration of the e
34、mitteris given in Fig. 4.6.2.3 A temperature sensor with an accuracy of 65 C shall be mounted on top of the top plate in the of the tracer gas emitterwithin 25 mm of the center of the plate.6.2.4 Atracer gas that is non-toxic, non-flammable, and stable up to 400 C (for example, CO2) shall be introdu
35、ced through theemitter.6.2.5 The tracer gas injection rate shall be controlled to within 61 % using a mass flow control system. The flow rate of tracergas injection shall be less than 0.5 % of the air flow through the range hood.FIG. 4 Plume Diffusion/Tracer Gas Emitter AssemblyE3087 1846.2.6 For 0.
36、61 m (24 in. nominal) wide hoods, the tests shall be performed using two emitter/pan/heating element locationssimultaneously. The emitters shall be located with the center of the emitters 500 mm (625 mm) from the back wall and 150 mm(610 mm) to the left and right of the centerline of the range hood.
37、 For 0.75 m (30 in. nominal) wide hoods, the tests shall beperformed using two emitter/pan/heating element locations simultaneously. The emitters shall be located with the center of theFIG. 4 Plume Diffusion/Tracer Gas Emitter Assembly (continued)FIG. 4 Plume Diffusion/Tracer Gas Emitter Assembly (c
38、ontinued)E3087 185emitters 500 mm (625 mm) from the back wall and 200 mm (625 mm) to the left and right of the centerline of the range hood.For 0.90 m (36 in. nominal) wide hoods, tests shall be performed using three emitter/pan/heating element locations simultaneously.The emitters shall be located
39、with the center of the emitters 500 mm (625 mm) from the back wall. One emitter shall be locatedon the centerline of the range hood. The other two emitters shall be centered 300 mm (625 mm) to the left and right of thecenterline of the range hood6.2.7 The ambient (Cambient) tracer gas concentration
40、shall be measured at the air inlet to the chamber.6.2.8 The chamber tracer gas concentration (Cchamber) shall be measured on the centerline of the range hood, 0.5 m out fromthe counter into the room and at a height half way between the top of the countertop and the bottom of the range hood, as illus
41、tratedin Fig. 4. The chamber air temperature shall be measured at this same location with an accuracy of 61 C.6.2.9 The exhaust tracer gas concentration (Cexhaust) shall be measured in the range hood exhaust ducting at a point at least 10duct diameters downstream of the connection to the range. The
42、measurement shall have five sample points across the exhaust ductcross-section.6.2.10 All tracer gas concentrations shall be measured using the same measurement device.6.3 Exhaust System:6.3.1 The exhaust system shall be used to connect the outlet of the range hood to outdoors or an environment isol
43、ated from thetest chamber.6.3.2 An auxiliary fan and damper shall be connected in line with the range hood exhaust to enable control of the range hoodair flows.6.3.3 Aflowmeter with an accuracy of 62.5 L/s or 5 % of measured flow (whichever is greater) shall be connected in line withthe range hood e
44、xhaust to measure the range hood exhaust air flow, Qhood (L/s).6.3.4 The airtightness of the exhaust system shall be measured by temporarily attaching a fan and flowmeter (with an accuracyof 0.25 L/s or 5 % of reading) to one end of the exhaust duct and blocking the other end. A pressure probe shall
45、 be installed tomeasure the pressure difference between the exhaust system and its surroundings. The fan shall then be used to pressurize theexhaust duct to 25 Pa and the flow required to achieve this pressure recorded. The maximum air leakage from the exhaust systemshall be less than 2.5 L/s at a t
46、est pressure of 25 Pa.7. Hazards7.1 Eye ProtectionBreakage at the air velocities and building pressure differences normally applied to the test chamber isuncommon, however, for added safety, adequate precautions, such as the use of eye protection shall be taken to protect thepersonnel.7.2 Safety Clo
47、thingUse safety equipment required for general field work, including safety shoes, and hard hats.7.3 Equipment GuardsThe air-moving equipment shall have proper protection for the fan or blower and to prevent accidentalaccess to any moving parts of the equipment.7.4 Noise ProtectionExposure to the no
48、ise level generated by some fans can be hazardous to the hearing of involved personneland hearing protection is required.7.5 Debris and FumesThe blower or fan may force a large volume of air into or out of a chamber while in operation. Careshall be exercised not to damage internal furnishings due to
49、 influx of air. Caution shall be exercised against sucking debris orexhaust gases into the interior of the building.FIG. 4 Plume Diffusion/Tracer Gas Emitter Assembly (continued)E3087 1867.6 Tracer GasThe tracer gases used in this method must be selected to be non-toxic. Care should be taken to ensure that theywill not chemically react or thermally break-down to form new compounds that could be hazardous.8. Procedure8.1 Temperature and other conditions for making the test must be stable and within the calibration ranges of the equipment.Tests shall be cond
