(800) 474-3267 | 1351 13th Ave S. Suite 130 Jacksonville Beach, FL 32250 | MoffittHVAC.com
MoffittVent™ Large Natural Ventilator
EAGLE series Natural Ventilation
Ventilation's Natural Solution since 1961
MoffittVentTM natural ventilator
EAGLE series Page 2 of 12 (800) 474-3267 | MoffittHVAC.com
MoffittVent™ Table of Contents
MoffittVent™ Table of Contents ................................................................................................................... 2
MoffittVent™ Product Details ....................................................................................................................... 3
Natural Ventilation System Design ............................................................................................................... 4
MoffittVent™ MV-24, MV-48, & MV-72 Submittal Data .............................................................................. 5
MoffittVent™ MV-96, MV-144, MV-180 Submittal Data .............................................................................. 6
MoffittVent™ Damper................................................................................................................................... 7
MoffittVent™ Mounting Details .................................................................................................................... 8
MoffittVent™ Air & Water Flow Diagram .................................................................................................. 9
MoffittVent™ Operation and Maintenance Manual................................................................................... 10
MoffittVent™ Pictures................................................................................................................................. 11
MoffittVent™ Guide Specification .............................................................................................................. 12
MoffittVentTM natural ventilator
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MoffittVent™ Product Details
STANDARD FEATURES Throat sizes: 24” – 180”
Lengths: 10’ – 1000’+
Mounting: Ridge, Slope, or Single Peak
Hot-Dip Galvanized Steel Frame
Galvalume sheeting, Mill Finish
Zinc plated sheeting fasteners
Integral transverse baffles for increased air flow through unit.
100% free area to face area ratio.
Gutters and Downspouts
Mounting Clips and Fasteners
Designed to meet local wind & snow codes
Installation instructions
Attachment Coordination Drawings
OPTIONAL FEATURES Sheeting
o Aluminum o Stainless Steel o Fiberglass
Painted sheeting o Kynar® Exterior with Wash Coat Interior o Kynar® Interior and Exterior o other specialty coatings
Frames o Corrosion resistant coating o Prime Paint Red
Bird Screen o ½” mesh 19 ga. Galvanized steel o ¾” mesh .050 expanded aluminum
Damper o Manual Damper
Direct chain pull from below Hand crank from roof Indirect winch operation
o Motorized Damper Roof Operated Motor
o Modulating
Installation o Turnkey with Extended Warranty o Supervision
BENEFITS Uses no energy, has no operating costs, and requires no maintenance (on units w/o damper)
No water entry at ANY wind velocity. All water is collected and then redirected onto the roof.
Is not affected by the direction or velocity of the wind.
Exhaust performance increases in higher wind conditions due to natural ventilation design
Designed to withstand 130 MPH at grade wind-speeds. Can be modified to meet higher wind speeds
Damper Operation works up to 80’ of damper, depending upon the throat size.
Natural Daylighting
APPLICATION Aluminum
Power stations
Glass
Rolling mills
Steel
Foundries
Forges
Warehouses
Compressor Stations PRODUCT DESCRIPTION The MoffittVent™ natural ventilator is designed to evacuate hot air while preventing water entrance. This highly effective & highly efficient ventilator has helped buildings stay cool for over 50 years.
MoffittVentTM natural ventilator
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Natural Ventilation System Design
A Natural Ventilation system provides a natural intake for fresh supply air and a natural evacuation point for hot air and fumes. Warm air naturally rises to the ceiling, natural ventilation lets it escape. This system has zero operating cost, zero maintenance costs, and makes for a cooler and more comfortable facility
Our 50 years of experience gives us the ability to design the optimal ventilation solution for your
facility. With our experience and time tested formulae we can design the optimal ventilation system for your facility.
Visit MoffittHVAC.com/Vent-Selector to begin designing a Natural Ventilation system yourself. Simply input the variables for your building (dimensions, heat load, etc.) and you’ll find out how much ventilation your building will need.
If you have any questions about this program, or if you want to talk about your results, contact us at 1-800-474-3267.
MoffittHVAC.com/Vent-Selector
MoffittVentTM natural ventilator
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MoffittVent™ MV-24, MV-48, & MV-72 Submittal Data
STANDARD FEATURES 1. Airshaft Frame 2. Damper – Single Leaf
(if required) 3. Operator 4. Rack & Pinion 5. Airshaft Panel 6. Wind band Frame 7. Fixed Top Frame 8. Top Tie Angle 9. Stringer Angle 10. Drain Gutter (With down spouts to wind band) 11. Corrugated Fixed Top Panel 12. Fixed Top Cap 13. Transverse Baffle 14. Corrugated Wind band 15. Bird Screen (if required)
OPTIONAL FEATURES Sheeting
o Aluminum o Stainless Steel o Fiberglass
Painted sheeting o Kynar Exterior with Wash Coat Interior o Kynar Interior and Exterior o other specialty coatings
Frames o Corrosion resistant coating o Prime Paint Red
Bird Screen o ½” mesh 19 ga. Galvanized steel o ¾” mesh .050 expanded aluminum
Damper o Manual Damper
Direct chain pull from below Hand crank from roof Indirect winch operation
o Motorized Damper 1/4 hp, 460/3/60 Roof Operated
o Modulating All Specifications are subject to change without notice unless approved in submittal by Moffitt Corporation, Inc.
Model Throat Width
A
Vent Height
B
Frame Width
C
Weight (lb/ft)
MV-24 24" 34-1/2" 61-1/4" 55 MV-48 48" 62-3/8" 114-1/2" 95 MV-72 72” 92-1/2” 168” 160
Line Quantity Throat Length Mounting Location
1 2 3 4 5
MoffittVentTM natural ventilator
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MoffittVent™ MV-96, MV-144, MV-180 Submittal Data STANDARD FEATURES 1. Airshaft Frame 2. Damper – Double Leaf
(If required) 3. Operator 4. Rack & Pinion 5. Airshaft Panel 6. Wind band Frame 7. Fixed Top Frame 8. Top Tie Angle 9. Stringer Angle 10. Drain Gutter (With down spouts to wind band) 11. Corrugated Fixed Top Panel 12. Fixed Top Cap 13. Transverse Baffle 14. Corrugated Wind band 15. Bird Screen (if required) OPTIONAL FEATURES Sheeting
o Aluminum o Stainless Steel o Fiberglass
Painted sheeting o Kynar Exterior with Wash Coat Interior o Kynar Interior and Exterior o other specialty coatings
Frames o Corrosion resistant coating o Prime Paint Red
Bird Screen o ½” mesh 19 ga. Galvanized steel o ¾” mesh .050 expanded aluminum
Damper o Manual Damper
Direct chain pull from below Hand crank from roof Indirect winch operation
o Motorized Damper 3/4 hp, 460/3/60 Roof Operated
o Modulating
All Specifications are subject to change without notice unless approved in submittal by Moffitt Corporation, Inc.
Model Throat Width
A
Vent Height
B
Frame Width
C
Weight (lb/ft)
MV-96 96" 120" 18'-10" 236 MV-144 144" 14'-10" 27'-3" 357 MV-180 180" 17'-11" 33'-9" 572
Line Quantity Throat Length Mounting Location
1 2 3 4 5
MoffittVentTM natural ventilator
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MoffittVent™ Damper
STANDARD FEATURES Sizes: 24”, 48”, 72” - single leaf Sizes: 96”, 144”, 180” - double leaf. OPTIONAL FEATURES Manual Operator
o Direct Drop, Continuous Loop o Indirect Operator from building column
(see diagram below) o Hand Wheel Crank from roof
Motorized Operator* o Sizes 24”, 48”: 1/3 HP, 460/3/360 o Sizes 72”+: 3/4 HP, 460/3/360 *require
reversing starter (by electrical contractor)
Indirect Damper Operator
All specifications are subject to change without notice unless approved in submittal by Moffitt Corporation, Inc.
Damper Section Length
Single Leaf Damper Double Leaf Damper
24" 48" 72" 96" 144" 180"
8' 80' 80' 80' 56' 32' 24'
10' 80' 80' 80' 60' 30' 20'
Field drill matching holes as needed (Fasteners not supplied)
Line to MoffittVent™
MoffittVent™
(2) 6" Idler Wheels (2) 3" Idle Wheels
(2) 6" Idler Wheels
Continuous loop chain
woven through Idlers from
roof peak at operator
(1) Take-up idler
7/16" Holes
Wheels Shown
# 10 Register Chain
NOTE: If no structure
exists where idlers are
required, it will be
necessary to field
fabricate a mounting
bracket for idlers.
MoffittVentTM natural ventilator
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MoffittVent™ Mounting Details
Typical Channel Diagram Connection
Information Required for Frame Detail
Roof Slope
Roof Depth Size, Weight, Type of
”W” Beams Size, Weight, Type of
Purlin Truss Spacing
Not in Ventilator Contract
Channel Diaphragm
Holes in channel diaphragm
"W" Beams
Holes in “W” Beams”
Closure
Closure Screw
Purlins
Roofing
Typical Curb Mounting Connection C/L
Curb Flashing
Curb WP Airshaft Framing
Mounting Channel
Truss WP
Mtd. direct Bolt, Nut, Washer Mtd. Purlin with Clip Angle
to Purlin Vent GA Line
½ “A” ½ “A” Note: 3 Bolts are required for MoffittVent™ sizes 96” & large
All specifications are subject to change without notice unless approved in submittal by Moffitt Corporation, Inc.
Note: 3 bolts are
required for
MoffittVent™ sizes
96" and longer
Airshaft Panel
Roof WP
Airshaft
Framing
Truss WP Ventilator Work
Line
Vent GA Line
1/2 "a"
Bolt, Nut, Washer
Sym. Abt. 1/2 "A"
Ventilator Size= MIN. Clear Roof Opening
B' Flashing 1/4"
Flashing Clearance
Wind band
framing
“A”
MoffittVentTM natural ventilator
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MoffittVent™ Air & Water Flow Diagram
Warm Air Exhaust
Water Flow
All specifications are subject to change without notice unless approved in submittal by Moffitt Corporation, Inc.
MoffittVentTM natural ventilator
EAGLE series Page 10 of 12 (800) 474-3267 | MoffittHVAC.com
MoffittVent™ Operation and Maintenance Manual
MAINTENANCE INSTRUCTIONS MoffittVent™ Ventilators are designed to provide many years of smooth, trouble-free service with only a minimal amount of periodic maintenance required. Ventilator dampers are controlled by a continuous steel line shaft (supported by roller bearing hangers at each frame), to which is attached the rack and pinion actuators. Check pinion set screw and line shaft couplings; tighten if necessary. The rack should be perpendicular to its attachment point on the damper panel, otherwise binding may occur. Adjust by loosening pinion set screw and re-positioning pinion on line shaft. Periodically apply a liberal coating of good quality gear grease (of a viscosity suited for the expected temperatures under which vents are to operate) to pinions, line shaft bearings, fixed and moving pivots. Moffitt Ventilators are designed to be self-cleaning by action of the elements. However, the atmospheric conditions to which ventilators are exposed will dictate the nature and frequency of a program to clean and maintain ventilators. We would recommend every 4 months for the first year, then adjusts per site requirements. DAMPER OPERATORS
MOTOR OPERATED - When the MoffittVent™ damper system is motor operated the open-close cycle of dampers is limit switch controlled. The unit will automatically shut off at the end of open or close cycle. Any intermediate damper position may be set by pushing the stop button or the starter push button unit.
MANUALLY OPERATED - When the MoffittVent™ Natural damper system is manually operated the open-close cycle of dampers is controlled by either a wheel handle located on the roof external to the unit or manual chain wheel drop located below the unit. The Damper can be opened or closed to any position by simply stopping the damper in the desired location. Visual inspection of the damper location is done through access doors located next to each operator wheel.
COMPONENT ACCESS Access the components inside the ventilator by removing the sheet of cladding from the side of the unit. A scaffold should then be spanned across the ventilator throat to reach to service the interior components. Remove scaffold and re-install cladding once maintenance has been completed. METAL STORAGE & MAINTENANCE - IMPORTANT
If not used immediately the metal should be stored in a dry place where there is as little moisture as possible to avoid staining or white rust. Moisture from rain, snow, condensation, etc. should be avoided as it can get trapped between the stacked materials.
Break the steel strapping bands used for shipment and store with the stacks or crates of metal in an inclined position.
If outdoor storage cannot be avoided, protect the metal with canvas or waterproof paper cover. Leave the bottom of the canvas loose to allow for air movement. Keep the steel off the ground in an inclined position with an insulator, such as wood. Do not use plastic! Plastic can cause sweating or condensation on the metal
Failure to follow above instructions could affect equipment warranty.
MoffittVentTM natural ventilator
EAGLE series Page 11 of 12 (800) 474-3267 | MoffittHVAC.com
MoffittVent™ Pictures
MoffittVentTM natural ventilator
EAGLE series Page 12 of 12 (800) 474-3267 | MoffittHVAC.com
MoffittVent™ Guide Specification
1.1. DESCRIPTION
Furnish and Install MoffittVent™ and accessories as indicated on drawings.
1.2. QUALITY ASSURANCE MOFFITT (Jacksonville, FL, 1-800-474-3267) Products establish the standard of quality required. Manufacturer and erector shall demonstrate a minimum of five (5) years of related industry experience.
1.3. SUBSTITUTIONS No substitutions will be considered unless written request for approval has been submitted by the bidder and has been received by the designer at least ten (10) days prior to bid date. Any proposed substitutions should meet the standards set by the specification.
1.4. SUBMITTALS Furnish approval drawings (coordinated attachment points) prior to fabrication. Furnish erection package prior to shipment showing all erection procedures and accessories required for the specified product.
2.1. DESIGN MoffittVent™ shall be designed to withstand a windward load of _______ psf and a _____ psf snow load with structural frames located 10’ on center standard or 8’ on center if required for loading. Throat size shall be _______.
2.2. MATERIALS 2.2.1. The MoffittVent™ free area shall increase proportionally throughout so as not to restrict calculated velocities
with the exhaust opening not exceeding 1.5 times the throat size. 2.2.2. All ventilators shall be capable of self-cleaning by action of the elements, with provisions for carrying water
and normal wind-transported soil to the outside of the ventilator. 2.2.3. Frames shall be constructed of minimum 3/16” ASTM A36 steel plate, angle and channel, and shall be shop
welded. Component parts shall be sized for ease of shipment and handling, and be field assembled. 2.2.4. After fabrication, all structural components shall be hot dip galvanized. Sheeting shall be 22 gauge
(Galvalume/G90 galvanized steel substrate: choose one) (note: for mill finish sheeting must be Galvalume) for the accelerator, hood, and end wall sheeting. The sheeting shall be (choose one): 2.2.4.1. Mill finish 2.2.4.2. Exterior stock kynar color to match interior wash coat 2.2.4.3. Exterior stock kynar color to match interior kynar color
2.3. ACCESSORIES Ventilators shall be equipped with 1/2” mesh, 19 gauge, galvanized bird screens attached to 3/8” diameter galvanized rod frames. Ventilators shall be equipped with dampers, each with a permanently sealed and lubricated mechanical gear reducer. The gear reducers shall open and close the dampers by means of rack arm and pinion gear operations. The damper shall be manually operated with a continuous loop chain wheel, manual roof hood crank, or electrically operated using ¼ or ¾ horsepower, 1800 RPM T.E.N.V. motors (choose one). Dampers shall be an integral part of the ventilator and shall form an inverted cone under the hood when the damper is in the open position for 5’ sizes and above, and single leaf for sizes 4’ and below.
3.1. INSPECTION Examine alignment of structural steel prior to installation and do not proceed until structure is within tolerances established by AISC.
3.2. INSTALLATION AND ERECTION Install MoffittVent™ and accessories in conformance with approved drawings and MOFFITT specifications & erection instructions.
3.3. DAMAGED MATERIAL Repair or replace all damaged material.