SECTION 15885

AIR CLEANING

PART 1 GENERAL

WORK INCLUDED

Washable permanent panel filters.

Disposable panel filters.

Disposable, extended area panel filters.

Automatic renewable media filters.

Extended surface retained media filters.

Extended surface non-supported media filters.

Extended surface high efficiency media filters.

High efficiency particulate air (HEPA) filters.

Electronic air cleaners.

Activated carbon filters.

Filter frames.

Filter gages.

RELATED WORK

Section 01513 - Temporary Heating, Cooling, and Ventilating.

Section 15781 - Packaged Roof Top Heating/Cooling Units.

Section 15855 - Air Handling Units with Coils.

Section 15890 - Ductwork.

REFERENCES

ANSI/UL 586 - Test Performance of High Efficiency Particulate, Air Filter Units.

ANSI/UL 900 - Test Performance of Air Filter Units.

ASHRAE 52 - Method of Testing Air Cleaning Devices Used in General Ventilation for Removing Particulate Matter.

MIL-STD-282 - Filter Units, Protective Clothing, Gas-Mask Components and Related Products: Performance-Test Methods.

QUALITY ASSURANCE

Filter media shall be ANSI/UL 900 listed, Class 1 or Class 2, as approved by local authorities.

Provide all filters as product of one manufacturer.

Assemble filter components to form filter banks from products of one manufacturer.

SUBMITTALS

Submit [shop drawings and] product data under provisions of Section [01300] [01340] on filter media, filter performance data, filter assembly and filter frames. [Include dimensions, motor locations and electrical connections.]

Submit samples under provisions of Section [01300.] [01340.]

Submit [two] [________] samples of replacement filter media of each type and filter frame.

OPERATION AND MAINTENANCE DATA

Submit operation and maintenance data under provisions of Section [01700.] [01730.]

Include instructions for operation, changing, and periodic cleaning.

EXTRA STOCK

Provide [one set] [________] of [disposable panel filters] [renewable media filters] under provisions of Section [01700.] [01750.]

DELIVERY, STORAGE, AND HANDLING

Store and protect products under provisions of Section [01600.] [01620.]

Protect [________] from [____________] by [____________.]

PART 2 PRODUCTS

ACCEPTABLE MANUFACTURERS

[_________________________________.]

[_________________________________.]

[_________________________________.]

Substitutions: Under provisions of Section [01600.] [01630.]

WASHABLE PERMANENT PANEL FILTERS

Media: 14 mesh [steel screen, zinc electroplated] [stainless steel] [aluminum], alternate layers of flat and herringbone crimp, four layers per inch (25 mm); rod reinforced; enclosed in [16 gage (1.5 mm) galvanized steel] [20 gage (0.90 mm) stainless steel] frame; nominal size [24 x 24] [____x____] inches ([610 x 610] [____x____] mm) x [one] [2] inches ([25] [50] mm) thick.

Rating: 500 FPM (2.54 m/sec) face velocity, 0.10 inches (25 Pa) WG initial resistance, 0.50 inch WG (125 Pa) recommended final resistance.

Model: [____________] manufactured by [____].

DISPOSABLE PANEL FILTERS

Media: [2 inch (50 mm)] [One inch (25 mm)] thick fiber blanket, factory sprayed with flameproof, non-drip, non-volatile adhesive, nominal size [24 x 24] [____x____] inches ([610 x 610] [____x____] mm).

Rating: 500 FPM (2.54 m/sec) face velocity, [0.15 inch WG (37 Pa)] [0.10 inch WG (25 Pa)] initial resistance, 0.50 inches WG (125 Pa) recommended final resistance.

Casing: Cardboard frame with perforated metal retainer.

Holding Frames: 20 gage (0.90 mm) minimum galvanized steel frame with expanded metal grid on outlet side and steel rod grid on inlet side, hinged with pull and retaining handles.

Model: [____________] manufactured by [________.]

DISPOSABLE, EXTENDED AREA PANEL FILTERS

Media: Pleated, lofted, non-woven, reinforced cotton fabric; supported and bonded to welded wire grid;enclosed in cardboard frame; nominal size [24 x 24] [____x____] inches ([610 x 610] [____x____] mm) x [one inch (25 mm).] [2 inches (50 mm).] [4 inches (100 mm).]

Rating: ASHRAE 52; 25-30 percent dust spot efficiency, 90-92 percent weight arrestance; 500 FPM (2.54 m/sec) face velocity, 0.30 inch WG (75 Pa) initial resistance, 1.0 inch WG (250 Pa) recommended final resistance.

Model: [____________] manufactured by [____________.]

AUTOMATIC RENEWABLE MEDIA FILTERS

Assembly: Galvanized steel assembly with drive, controls, and media, which feeds media across air stream and winds and compresses used media for disposal. Enclose the clean media roll with hinged roll cover. Include tension panel to compress used media as it is spooled. Arrange to allow upstream replacement of filter media.

Media: Rolled and compressed, graduated density glass fiber blanket, nominally 2 inch (50 mm) thick when expanded, 50 ft (20 m) long; factory sprayed with flameproof, non-drip, non-volatile adhesive; bonded reinforcing on leaving side of media to prevent stretching and necking.

Rating: ASHRAE 52; 25 percent dust spot efficiency, minimum 80 percent weight arrestance; 500 FPM (2.54 m/sec) face velocity, 0.17 inch WG (40 Pa) initial pressure, 0.50 inch WG (125 Pa) recommended final resistance.

Drive Mechanism: [Electric gear reducer motor] [Hand crank for manual operation] to rewind spool through chain and sprocket assembly.

Controls: Provide manual switch to advance media.

Controls: Prewired control package to advance media [after preselected operating period of time,] [when filter resistance exceeds preselected high limit,] with media runout switch to stop travel and indicate runout, and manual switch to override controls and advance media.

Frame: Auxiliary frame on downstream side of unit for [downstream access] [side access] to extended surface [retained media] [non-supported media] [biological] [HEPA] filters.

Model: [________________] manufactured by [________________].

EXTENDED SURFACE RETAINED MEDIA FILTERS

Media: Pleated, non-woven cotton fabric, scrim reinforced; supported by welded steel retainer; in 16 gage (1.5 mm) steel holding frame with corrosion resistant coating; effective media area [16] [20] [__] sq ft per 1000 CFM ([3.1] [3.9] sq m per 1000 L/sec) capacity rating. Nominal size [24 x 24 x 12] [____x____x____] inches ([610 x 610 x 300] [____x____x____] mm) deep.

Rating: ASHRAE 52; [30] [50] [80] [90] percent dust spot efficiency, [92] [96] [98] [99] percent average weight arrestance; 500 FPM (2.54 m/sec) face velocity, initial resistance, [0.20] [0.50] [0.75] inch WG ([50] [125] [185] Pa,) recommended final resistance 0.50 inch WG (125 Pa) above initial resistance.

Model: [____________] manufactured by [____________.]

EXTENDED SURFACE NON-SUPPORTED MEDIA FILTERS

Media: Reinforced glass fiber preformed into series of pockets with media spacing controls by variable length stitches; galvanized steel header frame; [35] [ ] sq ft of media per 1,000 CFM ([6.9] [____] sq m per 1000 L/sec) capacity. Nominal size [24] [__] x [24] [__] x [22] [30] [36] [__] inches ([610] [__] x [610] [__] x [560] [760] [910] [__] mm) deep.

Rating: ASHRAE 52; [50] [80] [90] percent dust spot efficiency, [97] [98] [99] percent weight arrestance; initial resistance, [0.30] [0.40] [0.75] inch WG ([75] [100] [187] Pa), 1.0 inch WG (250 Pa) recommended final resistance.

Model [____________] manufactured by [____________.]

EXTENDED SURFACE HIGH EFFICIENCY MEDIA FILTERS

Media: Pleated, water-resistant glass fiber with [aluminum] [kraft] separators; in 16 gage (1.5 mm) steel holding frame with corrosion resistant coating. Nominal size [24] [__] x [24] [__] x [6] [12] [__] inches ([610] [__] x [610] [__] x [150] [300] [__] mm) deep.

Rating: ASHRAE 52; 95 percent dust spot efficiency; 0.3 micron dioctyl phthalate smoke (DOP) to 99 percent efficiency, in accordance with MIL-STD-282 thermal (DOP) penetration test method; 250 FPM (1.27 m/sec) face velocity, 0.50 inch WG (125 Pa) initial resistance, 1.0 inch WG (250 Pa) recommended final resistance.

Model: [____________] manufactured by [____________.]

HIGH EFFICIENCY PARTICULATE AIR (HEPA) FILTERS

Media: Pleated, water-resistant glass fiber with aluminum separators; ANSI/UL 586; in 16 gage (1.5 mm) zinc coated steel holding frame; nominal size [24 x 24 x 12] [___x___x___] ([610 x 610 x 300] [___x___x___] mm) deep.

Rating: 0.3 micron dioctyl phthalate smoke (DOP) to 99.97 percent efficiency, in accordance with MIL-STD-282 thermal (DOP) penetration test method; 250 FPM (1.27 m/sec) face velocity, 1.0 inch WG (250 Pa) initial resistance, 3.0 inch WG (750 Pa) recommended final resistance.

Model: [____________] manufactured by [____________.]

ELECTRONIC AIR CLEANERS

Assembly: Galvanized steel assembly containing electronic agglomerator and [disposable panel] [automatic renewable media] [extended surface non-supported media] filters.

Electronic Agglomerator: Independently supported and nested collection cells of aluminum construction including ionizing section consisting of alternately spaced grounded struts and charged ionizing wires, and collecting section consisting of alternately grounded and charged plates, with insulators located out of air stream.

Power Pack: Self-contained, pre-wired rectifying unit to convert 115 volt AC to approximately 12,000 volts DC for ionizer and 6,000 volts DC for collector, including overload protection, on-off switch, pilot light indicating operating status.

Safety Accessories: Manual reset safety switches and warning lights for filter plenum access doors, signal lights and safety switching upstream and downstream of unit within duct, and enamelled high voltage warning signs.

Model: [________] manufactured by [________.]

ACTIVATED CARBON FILTERS

Assembly: Galvanized steel unit incorporating extruded aluminum tracks to accommodate filter servicing trays in deep V arrangement arranged for [upstream] [downstream] [side] servicing with disposable panel pre-filter.

Media: Activated carbon density 34 lb/cu ft (550 kg/cu m), pelletized or granular [to 6 x 10 Tyler mesh screen]; minimum carbon tetrachloride activity of 60 percent; in thin bed trays, nominal size [24x24x5/8] [____x____x____] inches ([610x610x16] [____x____x____] mm) thick; 1.42 cu ft of carbon per 1000 CFM (22 kg of carbon per 470 L/sec) nominal air flow capacity.

Rating: 500 FPM (2.54 m/sec) face velocity, 0.45 inch WG (110 Pa) initial resistance.

Model: [________] manufactured by [________.]

FILTER FRAMES

General: Fabricate filter frames and supporting structures of [16 gage (1.50 mm)] galvanized steel or extruded aluminum T-section construction with necessary gasketing between frames and walls.

Standard Sizes: Provide for interchangeability of filter media of other manufacturers; for panel filters, size for [24 x 24] [____x____] inches ([610 x 610] [____x____] mm) filter media, minimum 2 inches (50 mm) thick; for extended surface and high efficiency particulate air filters, provide for upstream mounting of panel filters.

Side Servicing Housings: Flanged for insertion into ductwork, of reinforced 16 gage (1.5 mm) galvanized steel; access doors with continuous gasketing and positive locking devices on both sides; extruded aluminum tracks or channels for primary [and secondary] [,secondary and tertiary] filters with positive sealing gaskets; Model [________] manufactured by [________.]

FILTER GAGES

Direct Reading Dial: [3-1/2 inch (90 mm)] [2 inch (50mm)] diameter diaphragm actuated dial in metal case, vent valves, black figures on white background, front recalibration adjustment, range [0-0.5] [0-1.0] [0-2.0] [0-3.0] [0-4.0] inch WG ([0-125] [0-250] [0-500] [0-750] [0-1000] Pa), [2] [3] percent of full scale accuracy; Model [____________] manufactured by [________.]

Inclined Manometer: One piece molded plastic with epoxy coated aluminum scale, inclined-vertical indicating tube and built-in spirit level, range 0-3 inch WG (0-750 Pa), 3 percent of full scale accuracy; Model [____________] manufactured by [____________.]

Accessories: Static pressure tips with integral compression fittings, 1/4 inch (6 mm) [aluminum] [plastic] tubing, 2-way or 3-way vent valves.

PART 3 EXECUTION

INSTALLATION

Install air cleaning devices in accordance with manufacturer's instructions.

Prevent passage of unfiltered air around filters with felt, rubber, or neoprene gaskets.

Do not operate fan system until filters (temporary or permanent) are in place. Replace temporary filters used during construction.

Install filter gage static pressure tips upstream and downstream of filters. Mount filter gages on outside of filter housing or filter plenum, in accessible position. Adjust and level.

AIR FILTER SCHEDULE

Drawing_Code	AF-1	AF-2	AF-3	AF-4

Location

Type

Number

Size

Air Flow

Face Velocity

Overall Height

Overall Width

Initial Resistance

Final Resistance

END OF SECTION