SECTION 15855

AIR HANDLING UNITS

PART 1 GENERAL

SECTION INCLUDES

Packaged air handling units.

Heating coils.

Mixing boxes.

Combination filter/mixing boxes.

Filter sections.

Face and bypass dampers.

Multi-zone dampers.

Sprayed coil dehumidifiers.

Cooling coils.

Humidifiers.

Roof curbs.

RELATED SECTIONS

Section 15121 - Expansion Compensation.

Section 15170 - Motors.

Section 15242 - Vibration Isolation.

Section 15290 - Ductwork Insulation.

Section 15410 - Plumbing Piping: Equipment drains.

Section 15790 - Air Coils.

Section 15811 - Evaporative Humidifier.

Section 15812 - Evaporative Pan Humidifier.

Section 15813 - Steam Grid Humidifier.

Section 15821 - Sprayed Coil Dehumidifier.

Section 15860 - Centrifugal Fans.

Section 15865 - Axial Fans.

Section 15885 - Air Cleaning.

Section 15890 - Ductwork.

Section 15910 - Ductwork Accessories: Flexible duct connections.

Section 16180 - Equipment Wiring Systems: Electrical characteristics and wiring connections.

REFERENCES

AFBMA 9 - Load Ratings and Fatigue Life for Ball Bearings.

AFBMA 11 - Load Ratings and Fatigue Life for Roller Bearings.

AMCA 99 - Standards Handbook.

AMCA 210 - Laboratory Methods of Testing Fans for Rating Purposes.

AMCA 300 - Test Code for Sound Rating Air Moving Devices.

AMCA 301 - Method of Publishing Sound Ratings for Air Moving Devices.

AMCA 500 - Test Methods for Louver, Dampers, and Shutters.

ARI 410 - Forced-Circulation Air-Cooling and Air-Heating Coils.

ARI 430 - Central-Station Air-Handling Units.

ARI 435 - Application of Central-Station Air-Handling Units.

ARI 610 - Central System Humidifiers.

NEMA MG1 - Motors and Generators.

NFPA 70 - National Electrical Code.

SMACNA - HVAC Duct Construction Standards - Metal and Flexible.

UL 900 - Test Performance of Air Filter Units.

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Shop Drawings: Indicate assembly, unit dimensions, weight loading, required clearances, construction details, field connection details, and electrical characteristics and connection requirements.

Product Data:

Provide literature which indicates dimensions, weights, capacities, ratings, fan performance, gages and finishes of materials, and electrical characteristics and connection requirements.

Provide data of filter media, filter performance data, filter assembly, and filter frames.

Provide fan curves with specified operating point clearly plotted.

Submit sound power level data for both fan outlet and casing radiation at rated capacity.

Submit electrical requirements for power supply wiring including wiring diagrams for interlock and control wiring, clearly indicating factory-installed and field-installed wiring.

Samples:	Submit [two] [________] of each type of replacement filter media with frame.

Manufacturer's Installation Instructions.

OPERATION AND MAINTENANCE DATA

Submit under provisions of Section [01700.] [______.]

Maintenance Data: Include instructions for lubrication, filter replacement, motor and drive replacement, spare parts lists, and wiring diagrams.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the Products specified in this section with minimum [three] [_______] years [documented] experience, who issues complete catalog data on total product.

DELIVERY, STORAGE, AND HANDLING

Deliver, store, protect and handle products to site under provisions of Section [01600.] [________.]

Accept products on site in factory-fabricated protective containers, with factory-installed shipping skids and lifting lugs. Inspect for damage.

Store in clean dry place and protect from weather and construction traffic. Handle carefully to avoid damage to components, enclosures, and finish.

ENVIRONMENTAL REQUIREMENTS

Do not operate units for any purpose, temporary or permanent, until ductwork is clean, filters are in place, bearings lubricated, and fan has been test run under observation.

EXTRA MATERIALS

Furnish under provisions of Section [01700.] [________.]

Provide [one set for each unit] [____________] of [fan belts] [filters] [____________________].

PART 2 PRODUCTS

MANUFACTURERS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

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

GENERAL DESCRIPTION

Configuration: Fabricate with [fan] [fan and coil section] plus accessories, including:

Heating coil.

Mixing box section.

Combination filter/mixing box section.

Filter section.

Face and bypass damper section.

Multi-zone damper section.

Sprayed coil dehumidifier section.

Cooling coil section.

Humidifier.

Performance Base: [Sea level] [________] conditions.

Fabrication: Conform to AMCA 99 [and ARI 430.]

Performance

Air Flow: [_____] cfm ([_____] L/sec) at [_____] in wg ([_____] Pa) external static pressure.

Motor: [_____] hp, [_____] volt, [single] [three] phase, 60 Hz.

CASING

Construction: Fabricate on channel base [and drain pan] of welded steel coated externally with manufacturers standard paint finish [with perforated inside casing].

Assemble sections with gaskets and bolts.

Outside Casing:

Aluminum: [16] [___] gage ([1.5] [___] mm).

Steel:	[16] [___] gage ([1.5] [___] mm).

Galvanized Steel: [18] [16] [___] gage ([1.2] [1.5] [___] mm).

Stainless Steel:	[16] [___] gage ([1.5] [___] mm).

Inside Casing:

Aluminum: [22] [___] gage ([0.8] [___] mm).

Galvanized Steel: [24] [___] gage ([0.6] [___] mm).

Stainless Steel:	[24] [___] gage ([0.6] [___] mm).

Floor Plate:

Galvanized Steel: [10] [___] gage ([3.3] [___] mm).

Stainless Steel:	[10] [___] gage ([3.3] [___] mm).

Insulation: [1] [1-1/2] [2] inch ([25] [40] [50] mm) thick, [1-1/2] [3] [6] lbs per cu ft ([24] [48] [96] kg per cu m) density, neoprene coated, glass fiber insulation, "K" value at 75 degrees F maximum 0.26 Btu/inch/sq ft/degrees F/hr ("ksi" value at 42 degrees C maximum 0.037 W/m/Degree K), applied to internal surfaces with adhesive [and weld pins]. Coat exposed edges of insulation with adhesive.

Finish: [Baked enamel] [Zinc chromate, iron oxide, phenolic resin paint] [Asphalt base coating formulated to protect surfaces, seal seams and joints, and provide insulation and sound deadening] [Three coat system of epoxy applied over shot blasted surface, to total thickness of 5-6 mils (0.13-0.15 mm)].

Inspection Doors: [10 x 10] [________] inch ([250 X 250] [________] mm) of galvanized steel for flush mounting, with gasket, latch, and handle assembly [and 1/4 inch (6 mm) thick plexiglass inspection window]. [Provide welded channel frame to set door out from casing to permit external insulation.]

****** [OR] ******

Inspection Doors: [18 x 22] [________] inch ([450 x 550] [________] mm) of galvanized steel for flush mounting, with gasket, latch, and handle assemblies [and 12 x 12 inch (300 x 300 mm) inspection window of 1/4 inch (6 mm) thick plexiglass]. [Provide welded channel frame to set door out from casing to permit external insulation.]

Walk-in Access Doors: [18 x 40] [24 x 48] [24 x 60] [30 x 60] [30 x 72] [_____] inch ([450 x 1000] [600 x 1200] [600 x 1500] [750 x 1500] [750 x 1800] [_____] mm) of galvanized steel insulated sandwich construction, for flush mounting, with hinges, gasket, latch, and handle assemblies [, and 12 X 12 inch (300 x 300 mm) inspection window of 1/4 inch (6 mm) thick plexiglass]. [Provide welded channel frame to set door out from casing to permit external insulation.]

Weatherproof Casing Finish: Seal fixed joints with flexible weather tight sealer. Seal removable joints with closed-cell foam gasket. Provide cap strips over roof flanges. Provide rain caps and gaskets on access doors.

Louvers:	[Stationary] [Adjustable], of galvanized steel, [4] [6] inch ([100] [150] mm) deep with plenum, [nylon bearings,] 1/2 inch (13 mm) mesh, 0.04 inch (1.0 mm) galvanized wire bird screen in [aluminum] [galvanized] frame, and bearing AMCA Certified Ratings Seal in accordance with AMCA 500. [Furnish adjustable louvers with hollow vinyl bulb edging on blades and foam side stops to limit leakage to maximum 2 percent at 4 inch wg (1 kPa) differential pressure when sized for 2000 fpm (10 m/sec) face velocity.]

Roof Mounting Curb: Galvanized steel, [12] [14] [____] inches] ([300 mm) high, insulated with wood nailing strip, and 1/2 x 2 inch (13 x 50 mm) neoprene gasket.

Lights: Provide in accessible sections suitable for damp locations with wire guards, factory wired to [weatherproof] switch [and pilot light] [and duplex outlet] mounted on casing exterior. In [sprayed coil] [humidifier] sections, provide lights suitable for wet locations.

Drain Pans: Construct from [single] [double] thickness galvanized steel [with insulation between layers] with welded corners. Cross break and pitch to drain connection. Provide drain pans under [fan section] [heating coil section] [cooling coil section] [mixing section] [humidifier section] [plenum sections] [with asphalt base coating].

Bottom Inlet Units: Provide steel or aluminum walking grate on structural supports.

Strength: Provide structure to brace casings for suction pressure of [2.5] [_____] inch wg ([600] [_____] Pa), with maximum deflection of 1 in 200.

FANS

Type: [Forward curved,] [Backward inclined,] [Air foil,] [single width, single inlet, centrifugal] [double width, double inlet, centrifugal] [Vane axial] [plug] type fan. [Refer to Section [15860] [15865].]

Performance Ratings:	Conform to AMCA 210 [and bear the AMCA Certified Rating Seal.]

Sound Ratings: AMCA 301; tested to AMCA 300 [and bear AMCA Certified Sound Rating Seal.]

Bearings: Self-aligning, grease lubricated, ball or roller bearings with lubrication fittings extended to exterior of casing with [plastic] [aluminum] [copper] tube and grease fitting rigidly attached to casing.

Mounting: Locate fan and motor internally on welded steel base coated with corrosion resistant paint. Factory mount motor on slide rails. Provide access to motor, drive, and bearings through removable casing panels or hinged access doors. [Provide built-in inertia base of welded steel with bottom sheet and reinforcing grid for concrete ballast.] Mount base on vibration isolators [; refer to Section 15242].

****** [OR] ******

Mounting: Locate motor, drive, and belt guard on integral casing framework on exterior of casing. [Provide ventilated weather cover of galvanized steel completely enclosing motor and drive with tachometer opening.] Mount casing on vibration isolators [; refer to Section 15242].

Fan Accessories:	[Variable inlet vanes] [Discharge dampers] [Damper operator]. [Refer to Section [15860] [15865].]

Flexible Connection:	Separate fan and coil sections [; refer to Section 15910].

Supply Fan Performance:

Air Flow: [_____] cfm ([_____] L/sec) at [_____] inch wg ([_____] Pa) external static pressure.

Motor: [_____] hp, [_____] volt, [single] [three] phase, 60 Hz.

Return Fan Performance:

Air Flow: [_____] cfm ([_____] L/sec) at [_____] inch wg ([_____] Pa) external static pressure.

Motor: [_____] hp, [_____] volt, [single] [three] phase, 60 Hz.

BEARINGS AND DRIVES

Bearings: AFBMA 9, [L-10 life at 50,000 hours] [L-50 life at 100,000 hours], heavy duty pillow block type,self-aligning, grease-lubricated ball bearings, or AFBMA 11, [L-10 life at 120,000 hours] [L-50 life at 400,000 hours] pillow block type, self-aligning, grease-lubricated roller bearings.

Shafts: Solid, hot rolled steel, ground and polished, with key-way, and protectively coated with lubricating oil.

V-Belt Drive: Cast iron or steel sheaves, dynamically balanced, bored to fit shafts and keyed. Variable and adjustable pitch sheaves for motors 15 hp (11.2 kW) and under selected so required rpm is obtained with sheaves set at mid-position; fixed sheave for 20 hp (15 kW) and over, matched belts, and drive rated as recommended by manufacturer or minimum 1.5 times nameplate rating of the motor.

Belt Guard: Fabricate to SMACNA Standard; 12 gage (2.8 mm) thick, 3/4 inch (20 mm) diamond mesh wire screen welded to steel angle frame or equivalent, prime coated. Secure to fan or fan supports without short circuiting vibration isolation, with provision for adjustment of belt tension, lubrication, and use of tachometer with guard in place.

ELECTRICAL CHARACTERISTICS AND COMPONENTS

Electrical Characteristics:

[____] volts, [single] [three] phase, 60 Hz.

Refer to Section 16180.

Motor: [Open drip proof] [TEFC] [Refer to Section 15170.] [NEMA MG1, [____].]

Wiring Terminations:	Provide terminal lugs to match branch circuit conductor quantities, sizes, and materials indicated. Enclose terminal lugs in terminal box sized to NFPA 70.

COILS

Casing: Provide access to both sides of coils. Enclose coils with headers and return bends [exposed outside] [fully contained within] casing. Slide coils into casing through removable end panel [with blank off sheets and sealing collars at connection penetrations].

Drain Pans: [24 inch (600 mm) downstream of coil] and down spouts for cooling coil banks more than one coil high.

Eliminators:	Three break of [galvanized steel,] [Type 304 stainless steel,] [PVC,] mounted over drain pan.

Air Coils: Certify capacities, pressure drops, and selection procedures in accordance with ARI 410. [Refer to Section 15790.]

Fabrication:

Tubes: 5/8 inch (16 mm) OD seamless copper expanded into fins, brazed joints.

Fins: Aluminum.

Casing: Die formed channel frame of galvanized steel.

Water Heating Coils:

Headers:	Cast iron, seamless copper tube, or prime coated steel pipe with brazed joints.

Configuration: Drainable, with threaded plugs for drain and vent; serpentine type with return bends on smaller sizes and return headers on larger sizes.

Steam Heating Coils:

Headers:	Cast iron with tubes expanded into header, seamless copper tube with silver brazed joints, or prime coated steel pipe with brazed joints.

Configuration: Drainable, with threaded plugs for drain and vent, threaded plugs in return bends and in headers opposite each tube, sloped within frame to condensate connection.

Steam Distribution Heating Coils:

Headers: Cast iron or prime coated steel pipe with	brazed joints.

Tubes: [5/8] [3/8] inch ([16] [9.5] mm) OD steam distributing tubes located within [one] [5/8] inch ([25] [16] mm) OD condensing tubes.

Configuration: Drainable, with threaded plugs for drain and vent; with [same end] [opposite end] [double steam] [double pass] connections.

Water Cooling Coils:

Headers:	Cast iron, seamless copper tube, or prime coated steel pipe with brazed joints.

Configuration: Drainable, with threaded plugs for drain and vent; threaded plugs in return bends and in headers opposite each tube.

Refrigerant Coils:

Headers:	Seamless copper tubes with silver brazed joints.

Liquid Distributors:	Brass or copper venturi type distributor with seamless copper distributor tubes.

Configuration:	Down feed with bottom suction.

Electric Coils:

Assembly: UL 1096 listed and labelled, with terminal control box and [hinged] cover, splice box, coil, casing, and controls.

Coil: [Enclosed copper tube, aluminum finned element] [Exposed helical coil].

Casing: Die formed channel frame of galvanized steel.

Controls: Automatic reset thermal cut-out, built-in [magnetic] [mercury] contactors[,][.] [control circuit transformer and fuse,] [manual reset thermal cut-out,] [air flow proving device,] [fused disconnect,] [unfused disconnect,] [load fuses.]

Hot Water Heating Coil:

Size: [____] inch ([____] mm) wide, [____] inch ([____] mm) high.

Rows: [________].

Capacity: [________] Btu/hr ([________] W).

Entering Air Temperature: [________] degrees F ([________] degrees C).

Leaving Air Temperature:	[________] degrees F ([________] degrees C).

Air Static Pressure Drop: [________] inch wg ([________]Pa).

Water Flow Rate:	[________] gal/min ([________] L/sec).

Entering Water Temperature: [________] degrees F ([________] degrees C).

Leaving Water Temperature: [________] degrees F ([________] degrees C).

Water Pressure Drop: [________] ft head ([________]Pa).

Steam Heating Coil:

Size: [____] inch ([____] mm) wide, [____] inch ([____] mm) high.

Rows: [________].

Capacity: [________] Btu/hr ([________] W).

Entering Air Temperature: [________] degrees F ([________] degrees C).

Leaving Air Temperature:	[________] degrees F ([________] degrees C).

Air Static Pressure Drop: [________] inch wg ([________]Pa).

Steam Flow Rate: [________] lb/hr ([________] kg/hr).

Entering Steam Pressure:	[________] psig ([________] kPa).

Water Cooling Coil:

Size: [____] inch ([____] mm) wide, [____] inch ([____] mm) high.

Rows: [________].

Capacity: [________] Btu/hr ([________] W).

Entering Air Temperature: [________] degrees F ([________] degrees C) DB and [________] degrees F ([________] degrees C) WB.

Leaving Air Temperature:	[________] degrees F ([________] degrees C) DB and [________] degrees F ([________] degrees C) WB.

Air Static Pressure Drop: [________] inch wg ([________]Pa).

Water Flow Rate:	[________] gal/min ([________] L/sec).

Entering Water Temperature: [________] degrees F ([________] degrees C).

Leaving Water Temperature:	[________] degrees F

([________] degrees C).

Water Pressure Drop: [________] ft head ([________]Pa).

Refrigerant Cooling Coil:

Size: [____] inch ([____] mm) wide, [____] inch ([____] mm) high.

Rows: [________].

Capacity: [________] Btu/hr ([________] W).

Entering Air Temperature: [________] degrees F ([________] degrees C) DB and [________] degrees F ([________] degrees C) WB.

Leaving Air Temperature:	[________] degrees F ([________] degrees C) DB and [________] degrees F ([________] degrees C) WB.

Air Static Pressure Drop: [________] inch wg ([________]Pa).

Refrigerant Saturated Suction Temperature: [________] degrees F ([________] degrees C).

Electric Coil:

Size: [____] inch ([____] mm) wide, [____] inch ([____] mm) high.

Capacity: [________] Btu/hr ([________] W).

Entering Air Temperature: [________] degrees F ([________] degrees C).

Leaving Air Temperature:	[________] degrees F ([________] degrees C).

Air Static Pressure Drop: [________] inch wg ([________]Pa).

Power Input: [________] kW.

SPRAYED COIL DEHUMIDIFIER

Units: Assembly with casing, tank, nozzles, spray headers, eliminators, water and drain connections [, spray pump,] and cooling coils. [Refer to Section 15821.]

Insulation: Externally insulate casing.	Mount on 2 inch (50 mm) thick rigid insulation board.

Performance:	Operate at [3 inch wg (747 Pa) negative] [3 inch wg (747 Pa) positive] [6 inch wg (1 494 Pa) positive] operating static pressure.

Coil: Refer to coil specification for size and cooling capacity.

Casing: 14 gage (1.80 mm) galvanized steel reinforced and braced with galvanized angles.

Drain Tank: [[10 gage (3.30 mm)] [3/16 inch (4.50 mm)] welded black steel with coating of [1/8 inch (3 mm) waterproof mastic] [3/32 inch (2.5 mm) minimum epoxy].] [glass fiber reinforced plastic.] [10 gage (3.30 mm) stainless steel.]

Coils: Copper, drainable.

Spray Headers: Galvanized steel pipe.

Spray Nozzles: Bronze, self-cleaning.

Spray Pump: Vertical in-line operating at 1750 rev/min.

Float Valve: Adjustable, with brass rod, brass float ball, and brass valve with replaceable neoprene seat.

Low Water Cut-off: Float operated.

HUMIDIFIER

Humidifiers:	Certify capacities and selection in accordance with ARI 610.

Steam Grid Humidifier: Stainless steel distribution tube with evenly spaced orifices extended full width of unit, factory mounted [in plenum with drain pan for draw-thru units] [in diffuser section of blow-thru units]. [Refer to Section 15813.]

Evaporative Pan Humidifier: Factory mounted in plenum with drain pan, float box, copper pan, water immersion type sheathed heating element, and low water cut-off switch. [Refer to Section 15812.]

Wet Glass Cell Washer: Section with 3 inch (75 mm) deep cells with random packed, glass fiber media in [galvanized] [stainless] steel frames, access door, spray tree assembly with [brass] [stainless steel] nozzles and[galvanized] [stainless] steel piping, and [galvanized] [stainless] steel eliminator plates. Assemble over welded [stainless] steel tank [with interior and exterior surfaces blasted and painted with zinc chromate paint.] Provide copper suction screen, drain, overflow, and suction connections in tank with make-up connection, [brass] float valve, and quick-fill connection. Insulate exterior with duct insulation. Mount tank on 2 inch (50 mm) thick rigid insulation board.

Evaporative Humidifier: Section with watertight [cast iron] door with brass fittings, wire glass window, and locking handles, [spray tree assembly with brass nozzles and galvanized piping, galvanized eliminator plates with flooding nozzles and header, and galvanized anti-splash baffles] [water distribution assembly with brass nozzles and galvanized piping and cross fluted cellulose media]. Assemble over welded steel tank with interior and exterior surfaces blasted and painted with zinc chromate paint. Provide copper suction screen, drain, overflow, and suction connections in tank with make-up connection, [brass] float valve, and quick-fill connection. Insulate exterior with duct insulation. Mount tank on 2 inch (50 mm) thick rigid insulation board. [Refer to Section 15811.]

FILTERS

Filter Box: Section with filter guides, access doors from both sides, for [side] [face] loading.

Filter Media: UL 900 listed, Class I or Class II, approved by [local] [____] authorities.

[Flat] [Angle] [High Capacity]: Arrangement with 2 inch (50 mm) deep [washable permanent panel filters.] [disposable panel filters.] [disposable, extended area panel filters.] [Refer to Section 15885.]

Renewable Media:	Section with [horizontal] [vertical] filters with [manual] [automatic] control [and auxiliary frame for extended surface [retained media filters] [non-supported media filters]]. [ Refer to Section 15885.]

Extended Surface: Filter box with holding frames and blank-off sheets, extended surface [retained] [non-supported] [high efficiency] media filters with [30] [50] [80] [90] [95] percent dust spot efficiency. [Refer to Section 15885.]

Filter Gauges: [3-1/2 inch (90 mm) diameter diaphragm actuated dial in metal case,] [2 inch (50 mm) diameter diaphragm actuated dial in metal case,] [One piece molded plastic inclined manometer,] with static pressure tips.

DAMPERS

Mixing Boxes: Section with factory mounted outside and	return air dampers of galvanized steel [with vinyl bulb edging] [and edge seals] in galvanized frame, with galvanized steel axles in self-lubricating [nylon] [brass] bearings, in [parallel] [opposed] blade arrangement [with damper blades positioned across short air opening dimension.] [Provide removable, full width rack for supporting freeze protection thermostat, with removable end panel to permit rack removal.]

Damper Leakage: Maximum 2 percent at 4 inch wg (1 kPa) differential pressure when sized for 2000 fpm (10 m/sec) face velocity.

Face and Bypass Dampers:	Factory mounted in casing with access doors, of galvanized steel blades, [with vinyl bulb edging] [and edge seals], galvanized steel frame, and axles in self-lubricating nylon bearings, arranged to match coil face with [bottom] [top] bypass, blank-off and division sheets, [internal] [external] linkage, access doors, and [adjustable] resistance plate.

Multi-Zone Dampers: Factory mounted in casing with service door, of galvanized steel blades [with vinyl bulb edging] [and edge seals] and frame with 1/2 inch (13 mm) diameter stainless steel shaft in oil impregnated bronze bearings, with end stops in frame, arranged for [parallel] [opposed] blade operation, with [adjustable] resistance plates, hand quadrants, and sheet metal clips for duct connections.

PART 3 EXECUTION

INSTALLATION

Install in accordance with manufacturer's instructions.

Install in conformance with ARI 435.

Assemble high pressure units by bolting sections together. [Isolate fan section with flexible duct connections.]

Install assembled unit on vibration isolators. Refer to Section 15242.

AIR HANDLING UNIT SCHEDULE

Drawing Code	AS-1	AS-2	AS-3

Manufacturer

Model

Fan

Capacity

Static Pressure

Motor

Heating Coil

Fin Series

Type

Height

Width

Rows

Capacity

Air Entering

Air Leaving

Air SP Drop

Water Entering

Water Leaving

Water Pressure Drop

Steam Capacity

Steam Pressure

Electrical Input

Cooling Coil

Fin Series

Type

Height

Width

Rows

Capacity

Air Entering

Dry Bulb

Wet Bulb

Air Leaving

Dry Bulb

Wet Bulb

Water

Flow

Entering

Leaving

Pressure Drop

Saturated Suction

Sound Power

Fan Discharge

1st Octave

2nd Octave

3rd Octave

4th Octave

5th Octave

6th Octave

7th Octave

8th Octave

Casing Radiated

1st Octave

2nd Octave

3rd Octave

4th Octave

5th Octave

6th Octave

7th Octave

8th Octave

Accessories

END OF SECTION