1、02-01-12 23 40 00 - 1 SECTION 23 40 00 HVAC AIR CLEANING DEVICES SPEC WRITER NOTE: Delete between / - / if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION A. Air filters for heating, ventil
2、ating and air conditioning. B. Definitions: Refer to ASHRAE Standard 52.2 for definitions of face velocity, net effective filtering area, media velocity, initial resistance (pressure drop), MERV (Minimum Efficiency Reporting Value), PSE (Particle Size Efficiency), particle size ranges for each MERV
3、number, dust holding capacity and explanation of electrostatic media based filtration products versus mechanical filtration products. Refer to ASHRAE Standard 52.2 Appendix J for definition of MERV-A. 1.2 RELATED WORK A. Section 23 05 11, COMMON WORK RESULTS FOR HVAC AND STEAM GENERATION: General me
4、chanical requirements and items, which are common to more than one section of Division 23. B. Section 23 73 00, INDOOR CENTRAL-STATION AIR-HANDLING UNITS: Filter housing and racks. C. Section 23 73 13, PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING UNITS: Filter housing and racks. D. Section 23 08
5、00 COMMISSIONING OF HVAC SYSTEMS: Requirements for commissioning, systems readiness checklists, and training. 1.3 QUALITY ASSURANCE SPEC WRITER NOTE: Discuss the filter test age with manufacturers and revise it if different from the age stated in paragraph A.1. However, the filter test age should no
6、t be more than 5 years old. A. Air Filter Performance Report for Extended Surface Filters: 1. Submit a test report for each Grade of filter being offered. The report shall not be more than three (3) years old and prepared by using test equipment, method and duct section as specified by ASHRAE Standa
7、rd 52.2 for type filter under test and acceptable to Resident Engineer, indicating that filters comply with the requirements of this specification. Filters utilizing partial or complete synthetic media will be tested in compliance with pre-conditioning steps as Provided by IHSNot for ResaleNo reprod
8、uction or networking permitted without license from IHS-,-,-02-01-12 23 40 00 - 2 stated in Appendix J. All testing is to be conducted on filters with a nominal 24 inch by 24 inch face dimension. Test for 150 m/min (500 fpm) will be accepted for lower velocity rated filters provided the test report
9、of an independent testing laboratory complies with all the requirements of this specification. SPEC WRITER NOTE: Witness testing may be required by the Project Manager on clean room systems and bag-in bag-out systems. /2. Government Option: The Government at its option may take one of the filters fo
10、r each different type submitted and run an independent test to determine if the filter meets the requirements of this specification. When the filter meets the requirements, the Government will pay for the test. When the filter does not meet the specification requirements, the manufacturer will be re
11、quired to pay for the test and replace the filters with filters that will perform as required by the specifications./ /3. Guarantee Performance: The manufacturer shall supply ASHRAE 52.2 test reports on each filter type submitted. Any filter supplied will be required to maintain the minimum efficien
12、cy shown on the ASHRAE Standard 52.2 report throughout the time the filter is in service. Within the first 6-12 weeks of service a filter may be pulled out of service and sent to an independent laboratory for ASHRAE Standard 52.2 testing for initial efficiency only. If this filter fails to meet the
13、minimum level of efficiency shown in the previously submitted reports, the filter manufacturer/distributor shall take back all filters and refund the owner all monies paid for the filters, cost of installation, cost of freight and cost of testing. B. Filter Warranty for Extended Surface Filters: Gua
14、rantee the filters against leakage, blow-outs, and other deficiencies during their normal useful life, up to the time that the filter reaches the final pressure drop. Defective filters shall be replaced at no cost to the Government. C. Comply with UL Standard 900 for flame test. D. Nameplates: Each
15、filter shall bear a label or name plate indicating manufacturers name, filter size, rated efficiency, / UL classification, / and file number./ 1.4 SUBMITTALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. B. Manufacturers Literature and Data: 1. Extended sur
16、face filters. 2. Holding frames. Identify locations. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-01-12 23 40 00 - 3 3. Side access housings. Identify locations, verify insulated doors. 4. HEPA filters. 5. Magnehelic gages. /6. Carbon Filters./
17、 C. Air Filter performance reports. D. Suppliers warranty. E. Field test results for HEPA filters as per paragraph 2.3.E.3. 1.5 APPLICABLE PUBLICATIONS A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by basic de
18、signation only. B. American Society of Heating, Refrigerating and Air-conditioning Engineers, Inc. (ASHRAE): 52.2-2007.Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size, including Appendix J C. American Society of Mechanical Engineers (ASME): NQA-1-20
19、08 . Quality Assurance Requirements for Nuclear Facilities Applications D. Underwriters Laboratories, Inc. (UL): 900;Revision 15 July 2009 Test Performance of Air Filter Units SPEC WRITER NOTE: Update material requirements to agree with applicable requirements (types, grades, classes, and other rela
20、ted items) specified in the referenced Applicable Publications. DESIGNERS NOTE: The VA Master Specifications do not match with the minimum filtration requirements outlined in ASHRAE Standard 170-2008. The filtration requirements outlined in this section shall govern. PART 2 - PRODUCTS SPEC WRITER NO
21、TE: Refer to filter schedules on drawings for filter size. 2.1 REPLACEMENT FILTER ELEMENTS TO BE FURNISHED A. To allow temporary use of HVAC systems for testing and in accordance with Paragraph, TEMPORARY USE OF MECHANICAL AND ELECTRICAL SYSTEMS in Section 01 00 00, GENERAL REQUIREMENTS, provide one
22、 complete set of additional filters to the Resident Engineer. B. The Resident Engineer will direct whether these additional filters will either be installed as replacements for dirty units or turned over to VA for future use as replacements. Provided by IHSNot for ResaleNo reproduction or networking
23、 permitted without license from IHS-,-,-02-01-12 23 40 00 - 4 2.2 EXTENDED SURFACE AIR FILTERS A. Use factory assembled air filters of the extended surface type with supported or non-supported cartridges for removal of particulate matter in air conditioning, heating and ventilating systems. Filter u
24、nits shall be of the extended surface type fabricated for disposal when the contaminant load limit is reached as indicated by maximum (final) pressure drop. B. Filter Classification: UL listed and approved conforming to UL Standard 900. C. HVAC Filter Types HVAC Filter Types Table 2.2C MERV Value AS
25、HRAE 52.2 MERV-A Value ASHRAE 62.2 Appendix J Application Particle Size Thickness /Type 8 8-A Pre-Filter 3 to 10 Microns 50 mm (2-inch) Throwaway 11 11-A After-Filter 1 to 3 Microns 150 mm (6-inch) or 300 mm (12-inch) Rigid Cartridge 13 13-A After-Filter 0.3 to 1 Microns 150 mm (6-inch) or 300 mm (1
26、2-inch) Rigid Cartridge 14 14-A After-Filter 0.3 to 1 Microns 150 mm (6-inch) or 300 mm (12-inch) Rigid Cartridge D. HEPA Filters HEPA Filters Table 2.2D Efficiency at 0.3 Micron Application Initial Resistance (inches w.g.) Rated CFM Construction 99.97 Final Filter 1.35 1100 Galvanized Frame X-Body
27、99.97 Final Filter 1.00 2000 Aluminum Frame V-Bank 2.3 MEDIUM EFFICIENCY PLEATED PANEL PRE-FILTERS (2”; MERV 8; UL 900 CLASS 2): A. Construction: Air filters shall be medium efficiency ASHRAE pleated panels consisting of cotton and synthetic or 100% virgin synthetic media, self supporting media with
28、 required media stabilizers, and beverage board enclosing frame. Filter media shall be lofted to a uniform depth and formed into a uniform radial pleat. The media stabilizers shall be bonded to the downstream side of the media to maintain radial pleats and prevent media oscillation. An enclosing fra
29、me of no less than 28-point high wet-strength beverage board shall provide a rigid and durable enclosure. The frame shall be bonded to the media on all sides to prevent air bypass. Integral diagonal support members on Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
30、se from IHS-,-,-02-01-12 23 40 00 - 5 the air entering and air exiting side shall be bonded to the apex of each pleat to maintain uniform pleat spacing in varying airflows. B. Performance: The filter shall have a Minimum Efficiency Reporting Value of MERV 8 when evaluated under the guidelines of ASH
31、RAE Standard 52.2. It shall also have a MERV-A of 8 when tested per Appendix J of the same standard. The media shall maintain or increase in efficiency over the life of the filter. Pertinent tolerances specified in Section 7.4 of the Air-Conditioning and Refrigeration Institute (ARI) Standard 850-93
32、 shall apply to the performance ratings. All testing is to be conducted on filters with a nominal 24” x 24” face dimension. Minimum Efficiency Reporting (MERV) 8 Dust Holding Capacity (Grams) 105 Nominal Size (Width x Height x Depth) 24x24x2 Rated Air Flow Capacity (Cubic Feet per Minute) 2,000 Rate
33、d Air Flow Rate (Feet per Minute) 500 Final Resistance (Inches w.g.) Maximum Recommended Change-Out Resistance (Inches w.g.) 1.0 0.66 Rated Initial Resistance (Inches w.g.) 0.33 C. The filters shall be approved and listed by Underwriters Laboratories, Inc. as Class 2 when tested according to U. L. S
34、tandard 900 and CAN 4-5111. 2.4 HIGH EFFICIENCY EXTENDED SURFACE (INTERMEDIATE/AFTER (FINAL) CARTRIDGE FILTERS (12”; MERV 14/13/11; UL 900 CLASS 2): A. Construction: Air filters shall consist of 8 pleated media packs assembled into 4 V-banks within a totally plastic frame. The filters shall be capab
35、le of operating at temperatures up to 80 degrees C (176 degrees F). The filters must either fit without modification or be adaptable to the existing holding frames. The molded end panels are to be made of high impact polystyrene plastic. The center support members shall be made of ABS plastic. No me
36、tal components are to be used. B. Media: The media shall be made of micro glass fibers with a water repellent binder. The media shall be a dual density construction, with coarser fibers on the air entering side and finer fibers on the air leaving side. The media shall be pleated using separators mad
37、e of continuous beads of low profile thermoplastic material. The media packs shall be bonded to the structural support members at all points of Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-01-12 23 40 00 - 6 contact, this improves the rigidity
38、as well as eliminates potential air bypass in the filter C. Performance: Filters of the size, air flow capacity and nominal efficiency (MERV) shall meet the following rated performance specifications based on the ASHRAE 52.2-1999 test method. Where applicable, performance tolerance specified in Sect
39、ion 7.4 of the Air-Conditioning and Refrigeration Institute (ARI) Standard 850-93 shall apply to the performance ratings. All testing is to be conducted on filters with a nominal 24“x24“ header dimension. Minimum Efficiency Reporting Value (MERV) 14 13 11 Gross Media Area (Sq. Ft.) Dust Holding Capa
40、city (Grams) 197 486 197 430 197 465 Nominal Size (Width x Height x Depth) 24x24x12 24x24x12 24x24x12 Rated Air Flow Capacity (cubic feet per minute) 2,000 2,000 2,000 Rated Air Flow Rate (feet per minute) 500 500 500 Final Resistance (inches w.g.) Maximum Recommended Change-Out Resistance (Inches w
41、.g.) 2.0 0.74 2.0 0.68 2.0 0.54 Rated Initial Resistance (inches w.g.) 0.37 0.34 0.27 2.5 HIGH EFFICIENCY PARTICULATE AIR (HEPA) FILTERS STANDARD CAPACITY (FINAL FILTER APPLICATION) A. Air filters shall be HEPA grade standard capacity air filters with waterproof micro glass fiber media, corrugated a
42、luminum separators, urethane sealant, 16-gauge steel enclosing frame and fluid sealing gasket. Sizes shall be as noted on drawings or other supporting materials. B. Construction: Filter media shall be one continuous pleating of microfine glass fiber media. Pleats shall be uniformly separated by corr
43、ugated aluminum separators incorporating a hemmed edge to prevent damage to the media. The media pack shall be potted into the enclosing frame with a fire-retardant urethane sealant. The enclosing frame shall be of 16-gauge steel, with a zinc aluminum alloy finish, and shall be bonded to the media p
44、ack to form a rugged and durable enclosure. The filter shall be assembled without the use of fasteners to ensure no frame penetrations. Overall dimensional tolerance shall be correct within -1/8”, +0”, and square within 1/8”. A poured-in-place seamless sealing gasket shall be included on the downstr
45、eam side of the enclosing frame to form a positive seal upon installation. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-01-12 23 40 00 - 7 C. Performance: The filter shall have a tested efficiency of 99.97%when evaluated according to IEST Recom
46、mended Practice. Initial resistance to airflow shall not exceed 1.0” w.g. at rated capacity. Filter shall be listed by Underwriters Laboratories as UL 900. The filter shall be capable of withstanding 10” w.g. without failure of the media pack. Manufacturer shall provide evidence of facility certific
47、ation to ISO 9001:2000. HEPA Performance (Standard Capacity) Table 2.5A Nominal Size (inches) Airflow Capacity (cfm) Media Area (Square Feet) 24H by 24W by 12D 1080 at 1.0” w.g. 153 24H by 12W by 12D 500 at 1.0” w.g. 33 Follow manufacturers recommendation for change out resistance, typically double
48、the initial. D. Supporting Data: The filter shall be labeled as to tested efficiency, rated/tested cfm, pressure drop and shall be serialized for identification. The manufacturer shall supply a Certificate of Conformance for each HEPA filter supplied to the facility. 2.6 HEPA FILTERS HIGH CAPACITY V
49、-BANK HIGH CAPACITY FILTERS (FINAL FILTER APPLICATION) A. Air filters shall be absolute grade HEPA filters consisting of pleated media packs assembled in a V-bank configuration, polyurethane sealant, anodized aluminum enclosure and seamless fluid sealing gasket. Sizes shall be as noted on enclosed drawings or other supporting materials. B. Construction: Filter media shall be micro fiber glass formed
