5.1 Threshold of Capture and Containment—This test method describes flow visualization techniques that are used to determine the threshold of capture and containment (C&C) for idle and specified heavy cooking conditions. The threshold of C&C can be used to estimate minimum flow rates for hood/appliance systems.5.2 Parametric Studies—This test method also can be used to conduct parametric studies of alternative configurations of hoods, appliances, and replacement air systems. In general, these studies are conducted by holding constant all configuration and operational variables except the variable of interest. This test method, therefore, can be used to evaluate the following:5.2.1 The overall system performance with various appliances, while holding the hood and replacement air system characteristics constant.5.2.2 Entire hoods or characteristics of a single hood, such as end panels, can be varied with appliances and replacement air constant.5.2.3 Replacement air characteristics, such as make-up air location, direction, and volume, can be varied with constant appliance and hood variables.1.1 Characterization of capture and containment performance of hood, appliance(s), and replacement air system during cooking and non-cooking conditions (idle):1.2 Parametric evaluation of operational or design variations in appliances, hoods, or replacement air configurations.1.3 The test method to determine heat gain to space from commercial kitchen ventilation/appliance systems has been re-designated as Test Method F2474.1.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 646元 / 折扣价： 550 元 加购物车

This specification covers the requirements and corresponding test methods for manufactured polymeric materials used to provide a rainscreen function, a means for the drainage of liquid moisture and the ventilation of vapor moisture that enters an above-grade exterior wall assembly. Rainscreen materials that conform to this specification are intended to be used behind exterior cladding products and to cover the entire wall area that is designed to provide a rainscreen function to resist water infiltration. Three types of rainscreen materials are addressed: Type A (entangled mesh materials), Type B (formed/textured sheet material), and Type C (formed battens). This specification also covers descriptions of the materials and material composition; material properties and material performance requirements; specimen preparation; reporting requirements; marking and labeling; and packaging and package marking. A table presents the requirements for ventilation/airflow, drainage, thickness, compression, strength, UV exposure, heat aging, mold/fungal growth, and water exposure.1.1 This specification is applicable to manufactured polymeric materials used to provide a rainscreen function, a means for the drainage of liquid moisture and the ventilation of vapor moisture that enters an above-grade exterior wall assembly. Rainscreen materials that comply with this specification are intended to be used behind exterior cladding products and intended to cover one hundred percent (100 %) of the wall area that is designed to provide a rainscreen function to resist water infiltration.1.2 This specification addresses the following types of rainscreen materials:1.2.1 Type A—entangled mesh materials.1.2.2 Type B—formed/textured sheet material.1.2.3 Type C—formed battens.1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车

4.1 A major concern for administration officials is security of barriers used in detention/correctional facilities. These test methods are designed to identify the security levels for ventilation grilles mounted within these barriers.4.2 The purpose of these tests is to approximate levels of abuse to which grilles will potentially be subjected in the field, and to provide assurance of protection to the public, facility administrative personnel, and inmates.1.1 These test methods cover requirements for simulated service tests and testing equipment for determining the performance characteristics of ventilation grilles used in secure areas, including detention and correctional facilities. The testing equipment provides for the setup and testing of specimen grilles and mounting systems. It is recognized that, in order to meet the intent of these test methods, ventilation grilles must be compatible with the level of performance require by Test Methods F2322.1.2 It is the intent of these test methods to ensure that security ventilation grilles meet minimum performance levels to control the passage of unauthorized materials into secure areas, to confine inmates, to resist vandalism, and to delay or frustrate escape, or both. It is also the responsibility of the user of these test methods to insure that the grille selected is appropriate, based on relevant regulatory, health, and safety concerns and requirements. Such concerns include, but are not limited to, injury and suicide avoidance. These test methods do not quantify such concerns.1.3 Take care to provide access to return and exhaust ducts for cleaning as required by NFPA 90A. If access cannot be provided though an interstitial space behind walls or ceiling, the use of filter grilles needs to be considered as an option. When filter grilles are provided, filters shall have a minimum UL-900 class 2 rating, and a filter replacement program needs to be in place at the facility.1.4 Airflow performance shall be catalogued in accordance with ASHRAE 70–91. Manufacturer’s catalog data must include grade level achieved.1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

5.1 Indoor CO2 concentrations have been described and used by some people as an indicator of indoor air quality. These uses have included both appropriate and inappropriate interpretations of indoor CO2 concentrations. Appropriate uses include estimating expected levels of occupant comfort in terms of human body odor, studying occupancy patterns, investigating the levels of contaminants that are related to occupant activity, and screening for the sufficiency of ventilation rates relative to occupancy. Inappropriate uses include the application of simple relationships to determine outdoor air ventilation rates per person from indoor CO2 concentrations without verifying the assumptions upon which these relationships are based, and the interpretation of indoor CO2 concentrations as a comprehensive indicator of indoor air quality.5.2 Outdoor air ventilation rates affect contaminant levels in buildings and building occupants' perception of the acceptability of the indoor environment. Minimum rates of outdoor air ventilation are specified in building codes and indoor air quality standards, for example, ASHRAE Standard 62. The compliance of outdoor air ventilation rates with relevant codes and standards are often assessed as part of indoor air quality investigations in buildings. The outdoor air ventilation rate of a building depends on the size and distribution of air leakage sites, pressure differences induced by wind and temperature, mechanical system operation, and occupant behavior. Given all of this information, ventilation rates are predictable; however, many of these parameters are difficult to determine in practice. Therefore, measurement is required to determine outdoor air change rates reliably.5.3 The measurement of CO2 concentrations has been promoted as a means of determining outdoor air ventilation rates per person. This approach, referred to in this guide as equilibrium analysis, is based on a steady-state, single-zone mass balance of CO2 in the building and is sometimes presented with little or no discussion of its limitations and the assumptions on which it is based. As a result, in some cases, the technique has been misused and indoor CO2 concentration measurements have been misinterpreted.5.4 When the assumptions upon which equilibrium analysis is based are valid, the technique can yield reliable measurements of outdoor air ventilation rates. In addition, indoor CO2 concentrations can be used to determine other aspects of building ventilation when used properly. By applying a mass balance at an air handler, the percent outdoor air intake in the supply airstream can be determined based on the CO2 concentrations in the supply, return, and outdoor air. This percentage can be multiplied by the supply airflow rate of the air handler to yield the outdoor air intake rate of the air handler. In addition, the decay of indoor CO2 concentrations can be monitored in a building after the occupants have left to determine the outdoor air change rate of the building.5.5 Continuous monitoring of indoor and outdoor CO2 concentrations can be used to study some aspects of ventilation system performance, the quality of outdoor air, and building occupancy patterns.1.1 This guide describes how measured values of indoor carbon dioxide (CO2) concentrations can be used in evaluations of indoor air quality and building ventilation.1.2 This guide describes the determination of CO2 generation rates from people as a function of body size and level of physical activity.1.3 This guide describes the experimentally-determined relationship between CO2 concentrations and the acceptability of a space in terms of human body odor.1.4 This guide describes the following uses of indoor CO2 concentrations to evaluate building ventilation–mass balance analysis to determine the percent outdoor air intake at an air handler, the tracer gas decay technique to estimate whole building air change rates, and the constant injection tracer gas technique at equilibrium to estimate whole building air change rates.1.5 This guide discusses the use of continuous monitoring of indoor and outdoor CO2 concentrations as a means of evaluating building ventilation and indoor air quality.1.6 This guide discusses some concentration measurement issues, but it does not include or recommend a method for measuring CO2 concentrations.1.7 This guide does not address the use of indoor CO2 to control outdoor air intake rates.1.8 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.10 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 646元 / 折扣价： 550 元 加购物车

定价： 646元 / 折扣价： 550 元 加购物车

This specification establishes the physical and performance requirements, and the corresponding test methods, for the evaluation of reflective insulation systems that are applied externally to rigid ducts in heating, ventilation, and air conditioning (HVAC) systems operating at specified temperatures. The products covered here are classified into five types according to the substrate material used, namely: Type A, product with polyethylene foam substrate; Type B, product with polyethylene bubble pack substrate; Type C, product with fiberglass substrate; Type D, product with polyester fiber substrate; and Type E, product with kraft paper substrate. Properly sampled specimens shall undergo test procedure to examine their conformance with the following requirements: emittance; water vapor permeance; surface burning characteristics; aging resistance; adhesive performance (bleeding and delamination); pliability; fungi resistance; thermal resistance; and hot-surface performance.1.1 This specification covers the requirements and physical properties of reflective insulation systems applied externally to Rigid Heating, Ventilation, and Air Conditioning (HVAC) duct systems operating at or below 250°F (121.1°C). These insulation systems consist of one or more low-emittance surfaces, such as metallic foil or metallic deposits, mounted on substrates to produce reflective air spaces. Reflective insulation systems derive thermal performance from surfaces with an emittance of no greater than 0.1 facing enclosed air spaces.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

This specification covers the performance requirements for four types (Types IA, IB, IIA, and IIB) of general-purpose air ovens of the gravity-convection and forced-ventilation types ordinarily used in testing operations. The temperature within the testing chamber shall be controllable by an automatic device and, when examined with appropriate test methods provided herein, shall be uniform within the tolerances for temperature uniformity, time constant, and rate of ventilation requirements for the particular type of oven.1.1 This specification covers the performance requirements for general-purpose air ovens ordinarily used in testing operations, which have a testing chamber up to 0.6 m3 (25 ft3) in volume. It is applicable to gravity-convection ovens designed to operate over all or part of the temperature range from 20 °C above ambient temperature to 200 °C and to forced-ventilation ovens designed to operate over all or part of the temperature range from 20 °C above ambient temperature to 500 °C.NOTE 1: Ovens are designed for maximum operating temperatures of about 200 °C, 300 °C, and 500 °C, the thermal insulation and cost of the oven being dependent on the maximum temperature required.1.2 This specification does not include safety requirements that are essential for ovens used in the presence of combustible vapors or gases.1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

定价： 646元 / 折扣价： 550 元 加购物车

定价： 646元 / 折扣价： 550 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

This specification covers performance requirements for general purpose air ovens ordinarily used in testing operations, which have a testing chamber up to 0.6 cu. m (25 cu. ft.) in volume. It applies to gravity convection ovens designed to operate over all or part of the temperature range from 20°C above ambient room temperature to 200°C, as well as forced ventilation ovens designed to operate over all or part of the temperature range from 20°C above ambient room temperature to 500°C.Included in this specification are the test procedures addressing temperature uniformity and rate of ventilation.1.1 This specification covers the performance requirements for general purpose air ovens ordinarily used in testing operations, which have a testing chamber up to 0.6 m3 (25 ft3) in volume.1.2 It is applicable to gravity convection ovens designed to operate over all or part of the temperature range from 20°C above ambient room temperature to 200°C.1.3 It is applicable to forced ventilation ovens designed to operate over all or part of the temperature range from 20°C above ambient room temperature to 500°C.1.4 This specification does not include safety requirements that are essential for ovens used in the presence of combustible materials.1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for reference only and may be approximate.1.5.1 The SI base unit of the expression of temperature is Kelvin (K), the unit of measure used in this specification is Celsius (°C) and has been derived mathematically.1.6 Calibration ovens to this standard are necessary to assure their operative performance under typical conditions of use and shall be performed periodically, either according to the manufacturer’s recommendations, the quality requirements of the end user, their customers, or suppliers.1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

定价： 515元 / 折扣价： 438 元 加购物车

5.1 Successful kitchen exhaust hood performance requires the complete capture and containment of the effluent plume along the hood’s entire perimeter. Any effluent leakage moving beyond 3 in. from the hood face will be deemed as having escaped from the hood, even if it may appear to be have been drawn back into the hood. If effluent spills from the hood, hot and greasy kitchens may be the result and the cause of the performance failure needs to be determined and corrected. Oftentimes, the exhaust flow rate needs to be increased to achieve proper hood performance for particular field conditions. As a result, the supply air to the kitchen will need to be increased to maintain the air balance. However, drafty room conditions due to incorrectly placed supply diffusers, cross drafts from windows and doors, return and supply at opposite ends of the kitchen, etc. could also severely degrade hood performance. Incorrectly designed supply systems may not be corrected by increasing the exhaust rate and could be corrected in a much more efficient and economical manner, such as by replacing a 4-way diffuser with a 3-way diffuser directed away from the hood. Likewise, if the plume is strongly captured, the hood may be over-exhausting and reducing the exhaust rate could be considered, along with a corresponding reduction of room supply air to maintain the building’s air balance.5.2 An appropriate airflow balance ensures adequate replacement air for the necessary exhaust conditions and allows the desired air pressure distribution to be maintained.5.3 Negative air pressure in the kitchen with respect to the adjacent indoor spaces ensures that the air flow is from these spaces into the kitchen so that odors and cooking effluent are contained within the kitchen. However, too great a pressure imbalance will severely degrade hood performance by creating a wind tunnel effect. Negative air pressure in the dining area with respect to the outside is usually an indication that the supply air rate is inadequate and as a result the exhaust air system is not performing as specified.1.1 This test method can be used to measure and validate successful design, installation and commissioning of commercial kitchen HVAC and makeup air systems for specific installations.1.2 This test method field evaluates commercial kitchen ventilation system airflows and pressures.1.3 This test method field evaluates visual hood capture and containment performance.1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are for information only.1.5 The data generated is specific to the field conditions as installed.1.6 This test method may involve hazardous materials, gasses (for example, CO) operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 646元 / 折扣价： 550 元 加购物车