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1、 Association of Home Appliance Manufacturers Household Humidifiers AHAM HU-1-2003 (Revision of AHAM HU-1-1997) i PREFACE The Association of Home Appliance Manufacturers develops standards in accordance with AHAMs “Policy and Procedures Governing Technical Standards“ which states: “AHAM standards sha
2、ll be in the best interest, mutually, of consumers who use appliances, the industries which provide and service appliances, and other interested parties. They shall relate to actual use conditions, be technically and scientifically sound.“ Use or observance of AHAM standards is voluntary. This stand
3、ard contains: Test procedures that may be applied to any brand or model of humidifier. Results of tests in accordance with this standard may be publicly stated. Methods for determining residential humidification requirements. Determination made in accordance with these methods can be used as a guide
4、 when estimating the appliance humidifier water output capacity recommended for specific residential applications. An appendix that sets forth recommended humidifier operating guidelines and practices. With regard to safety, AHAM recommends that all appliance products - both major and portable - man
5、ufactured or marketed in the United States be submitted to an appropriate independent testing laboratory for inspection and listing in conformance with the appropriate national safety standard. The relevant standard for humidifiers is Underwriters Laboratories 998, “Standard for Humidifiers.“ AHAM w
6、elcomes comments and suggestions regarding this standard. Any standard may be reviewed and improved as needed. All standards must be updated or reconfirmed at least every five years. Any interested party, at any time, may request a change in an AHAM standard. Such request should be addressed to AHAM
7、s President, and should be accompanied by a statement of reason for the request and a suggested alternate proposal. Copyright 2003 by the Association of Home Appliance Manufacturers (AHAM) All rights reserved. The hard copy print version of this document shall be for individual use only. The electro
8、nic file version of this document shall be for storage on one computer for purposes of viewing and/or printing one copy for individual use only. This document shall not be reproduced in whole or in part by any means, and shall not be transmitted electronically or otherwise to a third person without
9、the prior written permission of AHAM. ii Contents Section Page 1. PURPOSE1 2. SCOPE.1 3. DEFINITIONS 1 3.1 Types of Portable Humidifiers.1 3.2 Portable Humidifier Technologies.1 3.3 Water Output Capacity2 4. STANDARD TEST CONDITIONS2 4.1 Standard Test Temperatures2 4.2 Standard Voltage .3 4.3 Standa
10、rd Frequency.3 5. NAMEPLATE DATA.3 5.1 Electrical Data. 3 5.2 Voltage.3 5.3 Heater Wattage. .3 5.4 Output Capacity.3 6. WATER OUTPUT CAPACITY TEST.4 6.1 Instrumentation4 6.2 Testing Conditions.5 6.3 Run-In Period.5 6.4 Procedure for Developing 50 Percent Water Test Weight5 6.5 Equilibrium Test Condi
11、tions Prior to the Output Capacity Test.6 6.6 Testing Tolerances.6 6.7 Test for Water Output Capacity.7 6.8 Data to be Recorded.7 7. WATER OUTPUT CAPACITY CALCULATION8 7.1 Water Output Capacity at Standard Test Conditions.8 7.2 Water Output Capacity of Evaporative-Type Humidifiers at “Normal Room9 7
12、.3 Water Output Capacity in Metric and Imperial Measurement, (OPTIONAL)9 7.4 Calculation for “Area Humidified” in Square Feet.9 8. SAFETY11 SUPPLEMENT A - AHAM Appliance Humidifier Selection Guide.12 HUMIDIFIER SELECTION GUIDE15 APPENDIX A-Recommended Humidifier Operating Guidelines and Practices16
13、APPENDIX B - AHAM Recommended Humidifier - Care and Maintenance Guidelines.18 1 1. PURPOSE This standard establishes a uniform, repeatable procedure and standard methods for measuring specified product characteristics of humidifiers. The standard methods provide a means to compare and evaluate diffe
14、rent brands, models, and types of household portable humidifiers regarding characteristics significant to product use. The standard methods are not intended to preclude the exercise of ingenuity in testing nor to inhibit improvement and innovation in product testing, design or performance. 2. SCOPE
15、This standard applies to household portable humidifiers as defined in Section 3. This standard provides definitions, methods for testing and rating, and safety recommendations for household portable humidifiers. This standard does not apply to humidifying apparatus (central system humidifiers) which
16、 must be permanently connected to systems for heating, cooling, distributing, or otherwise treating circulated air within a building enclosure. 3. DEFINITIONS 3.1 Types of Portable Humidifiers. 3.1.1 Room Humidifier. A humidifier that will humidify spaces from 0 to 699 square feet. 3.1.2 Multi-Room
17、Humidifier. A humidifier that will humidify spaces from 700 to 1,399 square feet. 3.1.3 Whole House Humidifier. A humidifier that will humidify spaces 1,400 square feet and greater. 3.2 Portable Humidifier Technologies. An appliance in an encased assembly which can be used to add moisture to the air
18、 without requiring connection to a separate system for heating, cooling, distributing, or otherwise treating circulated air within a building enclosure. 2 3.2.1 Evaporative Humidifier. A humidifier that transmits moisture into the air in an invisible or imperceptible form of water vapor by means of
19、fan-forced air traveling through a moistened medium or filter. 3.2.2 Non-Evaporative Humidifier. A household portable humidifier that transmits moisture to the air in a visible (perceptible) form. Non-evaporative humidifier technologies include: 3.2.2.1 Ultrasonic Humidifier. A humidifier which turn
20、s water to vapor by means of ultrasonic vibrations. 3.2.2.2 Cool Mist Impeller Humidifier. A humidifier that transmits moisture into the air in a visible cool mist by transforming water into a fine mist by means of centrifugal force. 3.2.2.3 Steam Vaporizer. A humidifier that transmits moisture into
21、 the air by means of a steam vapor created by boiling water within a water container by means of an electrical heating element or electrodes. 3.2.2.4 Warm Mist Humidifier. A humidifier that transmits moisture into the air in a warm mist by means of an electrical heating element in a small and well-d
22、efined heating chamber or tray. 3.3 Water Output Capacity. The water output capacity is a measure of the ability of a humidifier to add moisture to its surrounding atmosphere and is stated as the number of gallons of water added per 24 hours of continuous operation at specified ambient conditions. (
23、See Sections 4, 7.1 and 7.2) 4. STANDARD TEST CONDITIONS Determine the water output capacity of a humidifier by testing at the following standard test conditions. 4.1 Standard Test Temperatures. The ambient air entering the humidifier, as measured by a psychrometer sampler positioned in accordance w
24、ith paragraph 6.2.2.1 is to have the following temperatures, except for a barometric pressure adjustment to the wet-bulb shown in Table I below for evaporative humidifiers. 3 For Evaporative Humidifiers Dry-Bulb Temperature = 75oF (23.9oC) Wet-Bulb Temperature = 56.5oF (13.6oC) (Relative Humidity 30
25、%) Table I - Wet-Bulb Adjustment (for evaporative humidifiers) Barometric Pressure, in. Hg Test Wet-Bulb Temperature, oF 30.72 56.7 30.32 56.6 29.92 56.5 29.52 56.4 29.12 56.3 28.72 56.2 28.31 56.1 For Non-Evaporative Humidifiers Dry-Bulb Temperature = 70oF (21.1oC) Wet-Bulb Temperature = 53.1oF (11
26、.7oC) (Relative Humidity = 30%) 4.2 Standard Voltage. Maintain +/- 1% of the appropriate standard voltages of 120, 208 or 240 volts at the service connection during the testing (see AC-1 Std.) 4.3 Standard Frequency. The standard testing frequency is to be 60 +/- 1 hertz (Hz). 5. NAMEPLATE DATA It i
27、s recommended that the following minimum information be included on the nameplate of each humidifier. 5.1 Electrical Data. Electrical data as required by the applicable Underwriters Laboratories standard for humidifiers (see Section 8). 5.2 Voltage. The voltage (nameplate voltage) at which the water
28、 output capacity was determined. 5.3 Heater Wattage. Electric heater wattage (if applicable). 5.4 Output Capacity. Water output capacity in gallons per 24 hours, liters per 24 4 hours, or Imperial gallons per 24 hours at normal room conditions. (See Section 7.2 and 7.3) 6. WATER OUTPUT CAPACITY TEST
29、 6.1 Instrumentation 6.1.1 Temperature Measuring Instruments. Temperature measurements shall be made with an instrument or instrument system, including read-out devices, meeting the accuracy and precision requirements below: a. Dry-bulb and wet-bulb temperatures, 0.1oF(0.06oC). b. All other temperat
30、ures, 1.0 oF(0.6oC). The following are in common use for this purpose but are not all inclusive: 1. Electric Resistance Thermometers, including thermisters 2. Mercury-in-glass thermometers 3. Thermocouples 6.1.2 Psychrometer Apparatus. Use an aspirating type psychrometer sampler to measure dry-bulb
31、and wet-bulb temperatures. Maintain air velocity across the sensing bulbs between 700 and 1000 ft/min (3.6 and 5.1 m/s). 6.1.3 Electrical Measuring Instruments. Make electrical measurements with meters having the following characteristics: Voltmeters. Voltmeters accurate to within 0.5% of the quanti
32、ty measured, with the smallest scale division representing a maximum of 2.0 volts. Ammeters. Ammeters accurate to within 0.5% of the quantity measured, with the smallest scale division representing a maximum of 0.1 amperes. Wattmeters. Wattmeters accurate to within 0.5% of the quantity measured, wit
33、h the smallest scale division representing a maximum of 5 watts. 6.1.4 Time Measuring Instruments. Use time measuring instruments accurate to within 0.1% of the quantity measured. 6.1.5 Weight Measuring Instruments. Use an instrument having an accuracy and readability each of 0.5% of the quantity me
34、asured. 5 6.2 Testing Conditions 6.2.1 Test Room. Test the humidifier in a room that has been provided with a means for maintaining the standard test conditions as specified in Section 4. 6.2.2 Positioning of Test Unit. Position the humidifier under test in the test room with both the air inlet and
35、outlet at least 3 ft (91 cm) from any wall or partition and so shielded that there will be no direct heat radiation to or from other objects in the test room. 6.2.2.1 Position the psychrometer sampling tube inlet 1 ft (30 cm) in front of the humidifier intake opening, so shielded as not to be influe
36、nced by recirculation. 6.2.3 Air Circulation. The air circulation in the test room is to be such that the dry and wet-bulb temperatures will be uniform over the humidifier air intake opening(s) and introduced into the test room in such a manner as not to aid or hinder the air circulated by the humid
37、ifier. Air currents measured three feet from the humidifier shall not have a velocity greater than 50 ft/min (0.25 m/s) with the humidifier “off”. 6.2.4 Water Hardness. For the tests, including the run-in period, use water having a hardness of 15 2 grains/gal (255 34 ppm). 6.3 Run-In Period. A run i
38、n period will pre-condition all types of humidifiers to average use conditions prior to testing at standard conditions. The humidifier controls and any other adjustable features are to be positioned, as recommended by the manufacturer, to obtain maximum output. The humidifier under test is to be run
39、-in until the amount of water equivalent to the product “Claimed Water Output Capacity in 24 hours” has been dispersed by the unit. If the humidifier is of the evaporative type, after the conditioning period, lift the evaporative media, (with its frame if applicable), out of the unit, and place the
40、conditioned wick on a tray and allow the evaporative media to dry naturally for a minimum of 48 hours, but not more than 72 hours prior to the timed water output test, (see 6.7). The run-in period does not require the use of the test room or instrumentation. 6.3.1 Total Water Holding Capacity. The a
41、mount of water added to the humidifier to obtain the manufacturers recommended full level. Using the container provided with the product or other suitable container, fill the humidifier following the manufacturers instructions. 1) to its marked full level; or 2) to the level at which overflow occurs
42、 if no full level is indicated; or 3) until the water bottle/bottles have been emptied and refilled as many times as necessary until no more water drains out of the bottle/bottles. If the humidifier contains an evaporative media, allow the media to reach saturation before adding the final fill. If d
43、esired, this measurement may be substantiated by testing. 6.4 Procedure for Developing 50 Percent Water Test Weight. Applicable to all 6 humidifiers, this test procedure will determine 50% of the total water holding capacity as defined in Section 6.3.1 above. This procedure is necessary to provide a
44、n average start weight for the output test by calculating one half the difference in the weight of water between the humidifier empty condition and the full condition. 6.4.1 Test Start Weight. Using weight measuring apparatus, record the “empty” weight of the fully assembled humidifier when complete
45、ly dry. Add water to the humidifier until the “total water holding capacity” (see 6.3.1) has been reached, and record the “full” weight. The weight of water in the humidifier is the difference between the “full” weight and the “empty” weight. Determine the 50% full weight of the humidifier by dividi
46、ng the water weight at the “full” condition by 2 and then adding the humidifier “empty” weight. The 50% full weight shall be the “Test Start Weight” for the Output Capacity Test. 6.5 Equilibrium Test Conditions Prior to the Output Capacity Test. Position the humidifier on a weight measuring device i
47、n the test room (see 6.2.2) and fill with conditioned water to a level slightly more than the “Test Start Weight.” The humidifier controls and any other adjustable features are to be positioned, as recommended by the manufacturer, to obtain maximum output. Place the humidifier in operation and adjus
48、t the test room control settings to maintain the standard test temperatures (see Section 4.1) within the limits shown in Table II, Testing Tolerances, under the column heading “Maximum Variation of Individual Readings” (see 6.6). To ensure equilibrium, observe and record the dry-bulb, wet-bulb, and
49、humidifier water temperature at 10 minute intervals. Proceed with the Test for Water Output Capacity (see 6.7) when four consecutive observations of the test room conditions are within the limits of Table II and when four observations of humidifier water temperature do not vary more than 2 degrees F. Note: Test water for evaporative humidifiers should be at, or allowed to reach, ambient dry-bulb temperature prior to start of the test. This is not applicable to non-evaporative humidifiers. 6.6 Testing Tolerances. Each of the thirteen readings of dry-bulb and we