GENERAL SPECIFICATIONS
1. Incorporated herein by reference are portions of ASHRAE SPL 52.1 and Underwriter Laboratory provisions.
2. IMPORTANT: Filters, as hereinafter specified, are based on specific requirements for operation at this facility. BIDS WHICH ARE NOT ACCOMPANIED BY LABORATORY TEST RESULTS FOR THE VARIOUS SECTIONS AS HEREINAFTER SPECIFIED WILL BE DISQUALIFIED. Particular attention will be given to the construction, efficiency, air flow resistances and test certification of all proposed material.
3. The vendor shall have representative samples of the products bid tested by a qualified ASHRAE independent testing laboratory that will test the filters to our specifications.
All lab tests must be performed within the test parameters, outlined in the SPECIFICATIONS sections for Lots 1 through Lot 6 and be in conformance with A SHRAE SPC52.1 and 52.2P or most current revisions thereto. The test report must certify that the test was conducted within the last six years. A certified copy of this test shall be attached to the bid submittal and show conformance to the specified values. Each test report form furnished must be marked to indicate the schedule number to which it applies.
The bidders shall certify in writing that any product furnished under a resulting contract will be the same in all respects to the one tested and approved by the independent laboratory.
Failure to complete requested information or furnish required documents with your bid will result in rejection of your bid.
4. The University of Wisconsin may, at any time during the contract, elect to subject any particular filter or media to an ASHRAE test. Should the filter or media fail to meet the requirements of this specification the vendor shall be liable for the cost of the test and shall extend full credit and bear all expenses for all filters or media returned. The supplier agrees to the return of filters and roll media (new or used) subject to the provisions as follows:
(a) Upon written notification the supplier shall within 2 weeks issue instructions for the return of the filters, or, (b) Advise the purchaser of his intent to challenge the test results, as explained in 4(c), (c) The supplier shall have the right to examine the test report and the option to further test the filters at his expense in order to prove to the purchaser that the original filters tested were representative of that supplied. (d) Such proof shall be presented to the purchaser within 45 days and the purchaser shall be the sole judge of adequacy of the proof supplied. (e) If the supplier is unable to prove to the satisfaction of the purchaser that the filters are in compliance with this specification, the media shall be returned freight collect. (f) The supplier agrees to accept the returned media and promptly issue credit for the original invoice amount providing the filters have not been used. If the media rolls have been used, credit will be issued for the above invoice amount on a prorated basis, based on the amount of footage, or percentage of, roll used.
5. Packaging and Identification of roll media, bag filters and regular filters are to be as follows:
(a) Packaging shall provide adequate protection against damage or deterioration during shipment, and allow complete identification of roll media, filters and the shipping containers. The cartons shall be marked so as to identify the filter it is replacing. Roll media shall be packaged 1 to a carton marked with the vendor trade name, model numbers, size and catalog designation or equivalent. The bag filter pockets or pleats shall be individually folded and firmly held in place in such a manner to prevent damage during transit, storage and installation. Installation instructions must be attached to each filter. (b) Each filter shall bear a label or name plate indicating the name or trade-name of the product, manufacturer’s name, efficiency, filter size, and arrows indicating air flow direction and the Underwriters’ Laboratories classification number. (c) Shipping containers shall be marked with no less than the items specified plus a distinctive model number, size, catalog designation, or equivalent.
SPECIFICATIONS FOR LOT 1 - AUTOMATIC ROLL FILTERS
Specifications: The words “media roll” or “roll media” refer to an assembly consisting of the filter medium wound on a spool, tube or core with end plates and auxiliary devices to meet the requirements of this specification. When ordering automatic roll filters the University of Wisconsin will specify the size, type and manufacturer of the air handling equipment. It is the vendor’s responsibility to furnish automatic roll filters with the correct spool size, rotation of unrolling and compliance to physical specifications. The replacement media roll shall be completely operational without any adaptation in existing equipment. This includes relationship of rotation, materials, dimensions and shape of all parts and other factors pertinent to installation and operation. Adapters, tools, or similar devices shall not be required or provided to achieve the performance specified.
The following filters have been pre-qualified through independent lab testing and campus field testing.
AIR GUARD SHP GRADE ROLL FILTERS, AMERICAN AIR FILTER ROLL-O-MAT GOLD
All other manufacturer’s roll top of the line filters will be considered for pre-qualification after they have submitted independent lab testing reports verifying performance at bid specification levels. When this condition has been met, the user will request product samples to install and field test at our facility. The field test is to evaluate field performance as installed in our racks under our operating conditions. The relative ease, or difficulty of loading the filter into the filter racks, and the ability of the filter to hold its shape without sagging will be the key issues in the field test.
Construction Requirements: The air filter media is to be composed of glass fibers bonded together with a thermosetting resin with a minimum thickness of 2” and dry weight of fiberglass of 24 to 28 grams per square foot. The media is a graded density becoming progressively denser from the air entering side to the air leaving side. The overall diameter begins at 25 microns on the air entering side of the media and increases to 50 micron on the air leaving side. The dry fiberglass media should be charged with a special dust holding adhesive, especially designed for roll filter applications which will not dry out or run-off when subjected to a temperature range of -10ºF to +160ºF.
The entire blanket should be reinforced with a fabric scrim netting, totally secured to the media to provide maximum media support and ensure media configuration. Each roll will have a paper leader and paper trailer which will be “rip stop” or reinforced so that they will not tear during installation. Each roll to be 65 feet in length.
Nominal Size: 24” x 24”
Nominal Airflow Velocity: 500 FPM
Upper Operating Resistance: 0.50 in. w.g.
Lower Operating Resistance: 0.40 in w.g.
Dust Holding capacity ( + 5%): 45 Gram/sq. ft.
Average Synthetic Dust Weight
Arrestance Dynamic: 81% minimum
Initial Resistance at 100% R.A.F. 0.14 No Variance
All construction requirements and test parameters are to be verified by an independent testing laboratory as designated in the bid request. Test shall be performed in accordance to ASHRAC Method 52 Section 11.2 “Dynamic Procedure for Self Renewable Filters.”
SPECIFICATIONS FOR LOT II - BAG FILTERS
Specifications: The required physical characteristics for extended area, dry type media, disposable, collapsible, bag type filters for use in air conditioning, heating and ventilating systems.
Construction Requirements: Filter units shall consist of a rigid corrosion resistant metal header to which individual pockets of filter media supported by a woven or non-woven backing are attached and sealed. The filter media shall be composed of thin glass fibers bonded by a phenolic resin. The exterior surface of each pocket shall be supported by the scrim backing equal in area to the media. All of the exposed edges shall be reinforced with sewn or heat bonded binding tape. Each pocket shall be divided into tubes formed preferably by a continuous sewn stitch and sealed on the air leaving side with a thermo-plastic seal bead. Staples, brads, or plastic fasteners are not acceptable for sealing exposed edges and seams. The filter shall have sufficient strength to operate up to 1.5 inches of water gauge final resistance without any evidence of tearing, pocket separation or separation from the header. The filters must fit existing frames without adjustment or modification to filter racks or holding mechanisms.
Performance tolerances shall conform to Section 7.4 of ARI Standard 850-78. All testing is to be performed on filters with a 24”x24” header dimension. Filters of the indicated size and capacity shall conform to the following minimum performance values:
Nominal Average Dust Spot Efficiency 40 to 45% 50 to 55%
Nominal Size 24”x24”x21” 24”x24”x21”
Nominal CFM Rating 2000 2000
Final Resistance (inches W.G.) 1.0” 1.0”
Initial Atmosphere Dust Spot Efficiency, +2% 15% 20%
Average Atmosphere Dust Spot Efficiency, +5% 40% 45%
Dust Holding Capacity (In Grams), +10% 350 435
Net Media Area, (sq. ft.) +10% 45 45
Number of Pockets 6 6
Nominal Average Dust Spot Efficiency 60 to 65% 80 to 85% 90 to 95%
Nominal Size 24”x24”x22” 24”x24”x22” 24”x24”x36”
Nominal CFM Rating 2000 2000 2000
Final Resistance (inches W.G.) 1.0” 1.0” 1.0”
Initial Atmosphere Dust Spot Efficiency, +2% 20% 60% 78%
Average Atmosphere Dust Spot Efficiency, +5% 50% 84% 90%
Dust Holding Capacity (In Grams), +10% 525 300 500
Net Media Area, (sq. ft.) +10% 56 63 116
Number of Pockets 10 10 9
The contractor shall guarantee the filter media against leaks, blowouts, and other deficiencies during the normal useful life. Normal useful life is 0.50” w.g. above initial. There must be no evidence in this range of media collapse, sloughing of dirt from the air leaving side or displacement from the seals in the air filtration machine. Media found to be deficient or faulty shall be sufficient cause to cancel the contract.
SPECIFICATIONS FOR LOT III - INDUSTRIAL DISPOSABLE FILTERS
Specifications: Replacement panel filters are for use in air conditioning, heating, and ventilating system.
Construction Requirements: Filter media shall be constructed of continuous filament glass fibers bonded together with a thermosetting resin. The media shall be formed in a graded density pattern, growing progressively more dense from the air entering side to the air leaving side. All frame edges shall be taped with a filter tape. The media shall be supported, on both sides, with a metal grill securely fastened to the frame and having at least an 82% open area. One (1) stiffener bar shall be fastened securely to each side of the filter frame.
Nominal Average Dust Spot Efficiency 20% or less 20% or less
Nominal Size 24”x24”x1” 24”x24”x2”
Nominal CFM Rating 2000 2000 2000 2000
Final Resistance (inches W.G.) 0.5 1.0 0.5 1.0
Dust Holding Capacity (In Grams), +10% 150 250 250 350
Specifications for Lot 3A are identical to those above except for the filters do not have taped frame edge requirement and do not have the stiffener requirement of the Style T filters.
SPECIFICATIONS FOR LOT IV - EXTENDED SURFACE AIR FILTERS
Specifications: Surface supported pleat type air filters which are a component of air conditioning, heating, and ventilating systems.
Construction Requirements: Each filter shall consist of a pleated media pack, a galvanized metal filter frame and glass fiber media pack sealant as shown below. The filter shall be capable of operating temperatures up to 350ºF. Filters must either fit without modification or be adaptable to the existing frames. If adapters are required, they must be included in the total bid and notation of this requirement made on the bid form.
a) Filter Frame: The filter frame and header shall be constructed of galvanized steel, with sufficient support to stabilize media pack to prevent media bowing.
b) Filter Media: The media shall be made from ultra-fine glass fibers and be water resistant. The media shall be pleated using corrugated aluminum separators.
c) Media Pack Sealant: The sealant material is to be made from fine glass fibers and used to seal the filter media pack at the top and bottom of the metal filter frame.
Nominal Average Dust Spot Efficiency 90% to 95%
Nominal Size 24”x24”x12”
Nominal CFM Rating 2000
Final Resistance (inches W.G.) 1.50
Initial Atmosphere Dust Spot Efficiency, +5% 80%
Average Atmosphere Dust Spot Efficiency, +3% 90%
Average Synthetic Dust Weight Arrest. 100%
Dust Holding Capacity (In Grams), +10% 300
Net Media Area, (sq. ft.) +5% 137
SPECIFICATIONS FOR LOT V - PLEATED PANEL FILTERS
Specifications: Pleated panel filters that are components of air conditioning, heating, and ventilating systems.
Construction Requirements: Each filter shall consist of a pleated media pack enclosed in a beverage board frame.
a) Filter Media: A blend of polyester and cotton fiber.
b) Filter Media Retainer: A metal grid bonded to the media on the air leaving side.
c) Filter Frame: Consists of two die-cut pieces of beverage board, one for the air entering side and one for the air leaving side. Each piece consists of a filter grid and four frame sides. When assembled, the two mating halves of the frame overlap one another providing double ply frame sides. The inside of the filter frame shall be bonded to the pleated media pack on all four (4) sides.
Nominal Average Dust Spot Efficiency 40% 60%
Nominal Size 24”x24”x2” 24”x24”x2”
Nominal CFM Rating 2000 2000 2000 2000
Final Resistance (inches W.G.) 0.80 1.0 0.80 1.0
Initial Atmosphere Dust Spot Efficiency, +2% 10% 27%
Average Atmosphere Dust Spot Efficiency, +5% 22% 28% 40% 50%
Average Synthetic Dust Weight Arrest., +5% 85% 95% 85% 95%
Dust Holding Capacity (In Grams), +10% 150 200 75 100
Net Media Area, (sq. ft.) +10% 18 18 18 18
SPECIFICATIONS FOR LOT VI - SLIP-ON PANEL FILTERS
Specification: Slip-On Panel Filters to be used on existing internal wire support frames.
Construction Requirements: The media will be a combination of 1” polyester media attached to a non-woven highly durable backing to support an internal wire frame. There must be sufficient spacing between the parallel stitch, or attachment means of the media, to allow for the ordered width to accommodate the given size of the internal wire support frame. The polyester media is made from high bulk polyester synthetic fibers bonded together with a fire retardant resin to form a high loft concentration of resilient fibers. The media must withstand direct moisture and be operational in a temperature range from -40ºF to 220ºF. The rolls are to be available in lengths not to exceed 135 feet per roll.
Nominal Size 24”x24”x1” 24”x24”x1” 24”x24”x1”
Nominal CFM Rating 1200 1200 1200
Final Resistance (inches W.G.) 0.50 0.75 1.0
Average Synthetic Dust Weight Arrest., +2% 90 90 90
Dust Holding Capacity (In Grams), +10% 150 190 230
|
