Titus Mobile Links. Catalogs & Brochures. $180. Aluminum HOUSING FINISH. ECM motor / HEPA Filter. Model 45DL1-0 (Note: Not recommended where static pressure drop across drum louver exceeds 0. (727) 443-7167. General Catalog. The DPL/DPL2 series drum louvers deliver air with extremely long throws, which makes them ideally suited for installation in large enclosures. High efficiency filters for use in Titus Critical Environment Diffusers. o. tbd4. Titus’ 300/350 Series supply grilles define the standard for the industry. US-DL is a supply/return drum louver with adjustable deflection blades and volume damper US300FL Aluminum universal end cap spiral grille, double deflection with 3/4" blade spacing, front blades parallel to long dimension DL - Drum Louvers. CONTACT US. Comprised of cylindrical drum pivoted within a 1 1/4" outer frame gasketed on all four sides to minimize. All Fuel (Class A) Chimney. Steel Aeroblade Single Deflection Supply Grille, 2" spacing, Blades Parallel to Long Dimension. The Titus Spiral Drum Louver is the. FFD - Standard construction, PSC motor, HEPA filter, 2ft x 2ft, 4ft x 2ft sizes. o. Products. US-DL is a supply/return drum louver with adjustable deflection blades and volume damper. QB48181. CALL. TI-SD are made in Aluminum construction with 40 degree rotatable core. Construction. High Capacity Drum Louver Performance Data - Price Industries. EXHAUST AIR LOUVER WITH DAMPER 40 air master CERTIFIED COMPANY 45 165 b. AIR MASTER EQUIPMENTS EMIRATES LLC P. Dorse & Company - Your Trusted HVAC Equipment ProviderTitus’ 300/350 Series return grilles define the standard for the industry. It consists of a thermostat, actuator, controller, damper, and airflow sensor (for pressure independent type only). Phillip’s flat head sheet metal screws painted white. 173 827. Contractor - TDIndustries. ). DL: DL-SV: US-DL. Steel Opposed Blade Damper for Drum Louvers. With high quality and competitive pricing these grilles form the back bone of a standard offering that will meet any application requirements. Airmaster strongly recommends high efficiency sand trap louver for higher air intake velocities. Phillip’s flat head sheet metal screws painted white. (727) 441-2651. S-DL - Long throw, high capacity aluminum supply grille with rotating drum and curved frame for duct mounting. Ideally suited to applications where ductwork cannot. GALVANNEAL DROP BOX 6 WAY DOUBLE DEFLECTION GRILLE. ECM motor / HEPA Filter. Titus balancing devices are easy to select and specify. Aluminum universal end cap spiral grille, double. Throw data assumes the blades are spread 15°. Linear Slot Ceiling Diffuser. US-DL-SV - US-DL is a supply/return drum louver with adjustable deflection blades and volume damper; S-DL - Long throw, high capacity aluminum supply grille with rotating drum and curved frame for duct mounting; DL - Long throw, high capacity supply grille with rotating drum; AG-15-HD - Steel Opposed Blade Damper for Drum Louvers Titus drum louvers are great for shopping malls, warehouses, sports arenas, factories and other large open areas where air must be thrown over a large distance. Phillips flat head sheet metal screws painted white. ABOUT THE PROJECTAdjustable Discharge Diffuser with Shallow Outer Cone and Round Plaque. Drum Louvers has succeeded in self-development of manufacturing and commerce since 2004 and is able to mass-productions of HVAC Equipment, made of aluminum, plastic, galvanic and stainless steel. 4 1 0 obj /ArtBox [21 21 633 813] /BleedBox [6. 45DLC2 - Drum Louver • Spiral Duct Mount • Split Vanes. fixed pattern. Titus drum louvers are great for shopping malls, warehouses, sports arenas, factories and other large open areas where air must be thrown over a large distance. DL-SV. Resources Products. Louvers & Dampers. SEND EMAIL. Steel louvered face diffuser. Their primary function is to regulate airflow to a zone, in response to zone temperature requirements. Drum louver diffusers shall be aluminum construction and incorporateTitus Series TDC diffusers handle an unusually large amount of air for a given pressure drop and noise level. Long throw, high capacity supply grille with rotating drum. 4-Way Blow Drum Louver (TDBA_D4) Linear, Plenum & Lt. Revit and related 3rd party applications require the model to pass. 301RL; 301RS; TI-GR-SL-H/V; Double Louver Grilles. These not only meet the function required, but also the form desired. LEED Certification - None. Steel double deflection supply grille, 3/4" blade spacing, front blades parallel to long dimension. Titus HVAC. TDCA-AA. Assets/Details. Steel Aeroblade Double Deflection Supply Grille, 3" spacing, Front Blades Parallel to Long Dimension. 940. Duct Smoke Detectors Life Safety Actuators Plenums. Steel double deflection supply grille, 3/4" blade spacing, front blades parallel to short dimension. GALVANNEAL DROP BOX 6 WAY DRUM LOUVER FACE DIFFUSER. Your email address will not be stored by us. Low Profile Drop Diffuser/Plenum. OPTIONS: oOpposed blade damper. 1985 Carroll St. Greenheck louvers are available in endless standard configurations. 173] /Contents 132 0 R /CropBox [0 0 654 834] /ICNValidStructure 0 /Margins [0 0 0 0] /MediaBox [0 0 654 834] /Parent 6 0 R /Resources > /ExtGState /GS0 8 0 R /GS1 9 0 R >> /Font > /ProcSet [/PDF /Text /ImageC] /Properties > /MC1 > /MC2 > /Properties1 > /Properties2. •Discharge drum louver with or without dampers •Filter or removable (quarter turn fasteners) single or double deflection grilles with or without dampers •Internal air deflector •Perimeter mounting flange in lieu of collar •Supply or return configurations •Standard sizes 600 to 70,000 cfmDrum Louvers. Typical Applications The HCD provides long throws to supply air to spaces that cannot be served by ductwork and conventional outlets due to structural or architectural. o. Titus models TAF-G, TAF-R, and TAF-R-FR are contructed of a high-impact polymer material that is designed to resist damage from foot traffic. CBD2-RG. PDF-1. The Titus ESV-VP offers a factory-installed hot water coil valve package, making installation at the jobsite even easier. Titus Model DL drum louvers are especially useful where long throws are required. Home. 2. Submittal Data — DL (63 KB, PDF) Engineering Data — Engineering Data - DL (225 KB, PDF) DLD : Double Deflection Louvered Diffuser - Ruskin. Prior to and after the sale, USAIRE sales and customer service is dedicated to providing the highest level of quality, value and service. ceiling applications that need single point supply air with long throws. FELT SEAL ADJUSTABLE VANES 5/16" (8) OVERALL HEIGHT VARIES BY DUCT SIZE B C The new Titus Spiral Drum Louver (US-DL) is the perfect solution for these applications. On Social Media. We are able to procure the exact quality what you need as well as you ask… Also, you will be satisfied for our suitable prices and reliability of. 45DLC2 - Drum Louver • Spiral Duct Mount • Split Vanes . Available in eight different core styles plus a wide selection of frames and borders. pdf THE NEW iNdusTrial sTrENgTH air ouTlET SPIRAL DRUM LOUVERS Open ceiling design with exposed spiral ductwork has become more provide the necessary air distribution . Stainless steel filter return grille, 3/4" blade spacing with 45 degree deflection, 1" filter. pdf THE NEW iNdusTrial sTrENgTH air ouTlET SPIRAL DRUM LOUVERS Open ceiling design with exposed spiral ductwork has become more provide the necessary air distribution . When performance and appearance is of prime importance, the CT linear bar grille is the logical choice. FlowBar’s outstanding performance allows higher air flows than conventional linear diffusers. Browser built in viewer; PDF Viewer; Universal Document Viewer; Google Docs View; Google Drive View; Download Document [pdf] Not Your Device? Search For Manuals or Datasheets below: File Info : application/pdf, 24 Pages, 10. FFD. Drum Louver ; VAV Diffuser ; Perfume 1 Products / Services available. Steel Square Plaque Diffuser with Louvers for Narrow Tee Ceilings. Models 45DLC1, 45DLC2 Page F168 Suffix '-DEX' adds a damper/extractor (air scoop) Models 45DL1, 45DL2 Page F170 Suffix '-O'. The system is ideal. First Hill Medical Pavilion. VAV Diffuser + Ruskin. Ludwig Drums is an American musical instrument manufacturer known for their incredible drum kits and percussion instruments. Titus provides different sizes to meet customer requirements Dia: 160mm,200mm,250mm,315 mm,355mm and 400mm. Long throw, high capacity supply grille with rotating drum. The TVM Ventilation Modules are designed for systems that require the distribution of a high volume of air from a single point through long adjustable air patterns in large facilities with high ceilings like data and distribution centers, warehouses, athletic centers and big box stores. All sizes have three cones, giving a uniform appearance where different. O Box – 3180 , Ajman Phone: +971 6 7436900High efficiency filters for use in Titus Critical Environment Diffusers. Swirl Flow (Helical Diffuser)UnderFloor Round Products are architecturally appealing diffusers and grommets that are designed for use in high induction raised floor applications. Yes you can do that. 300-RL: 300-RS: TI-GR-DL-H/V: Drum Louver: Titus drum louvers are great for shopping malls, warehouses, sports arenas, factories and other large open areas where air must be thrown over a large distance. 45DL1 - Single Vanes. We have strived to create an interactive resource to fill all of your HVAC needs. Aluminum universal end cap spiral grille, double. With high quality and competitive pricing these grilles form the back bone of a standard offering that will meet any application requirements. Steel. The new Titus Spiral Drum Louver (US-DL) is the perfect solution for these applications. GFR-10 - GeoFlow 1" perforated return. popularity in the 1960s thanks to an endorsement from none other than Ringo Starr. FFD - Standard construction, PSC motor, HEPA filter, 2ft x 2ft, 4ft x 2ft sizes. They are fully adjustable in both horizontal (through vane deflectors) and vertically (through the rotating drum) to provide primary supply air where needed in commercial and industrial applications. BIM allows for intelligent, 3D and parametric object-based design and provides full bi-directional associativity. (727) 443-7167. Ruskin was the first manufacturer to receive approval for use in Miami-Dade County, Florida hurricane. Louvers manufacturers & suppliers in UAE. Learn more -. Ludwig. The most complete line of AMCA certified and highly configurable louver products in the industry. The decorative grilles are manufactured and supplied at affordable prices. 1985 Carroll St. TMS. TDC-AA. INDUSTRIAL SUPPLY GRILLES • ALUMINUM. • The drum can be rotated to 30 vin either direction. 301-RS. With high quality and competitive pricing these grilles form the back bone of a standard offering that will meet any application requirements. The Overall Dimension is : 595 mm x 595 mm. Individually adjustable vanes Surface and spiral duct mounting available Rotateable drum provides 60° vertical adjustment Single blade Spilt blade The High Capacity Drum Louvers (HCD) consist of extruded aluminum blades mounted inside a rotatable drum to produce long air throws with a high degree of directional control. Revit - Grilles & Diffusers. The US-DL is a supply/ return drum louver with adjustable deflection blades and volume damper designed specifically for direct mounting on a spiral duct without the need for costly register taps. They are designed for quick access and adjustment and are engineered for the least possible noise, turbulence and air resistance. NAILER 6''X24'' DL SUPPLY GRILLE DIFFUSER WITH ROTATING DRUM MODEL 45DL1 REG1029. 2651Revision:. The Digital T3SQ is the most energy efficient VAV diffuser on the market. Properly designed UFAD systems take advantage of thermal stratification. US-DL-SV - US-DL is a supply/return drum louver with adjustable deflection blades and volume damper. 7. CT; Egg Crate Grille. Performance. From standard grilles and registers, to its architectural line of Formations® linear slot diffusers, along with a newly released series of displacement diffusers, METALAIRE has the air devices to meet every need. From standard grilles and registers, to its architectural line of Formations® linear slot diffusers, along with a newly released series of displacement diffusers, METALAIRE has the air devices to meet every need. 30RS. Infini-Jet Drum Louver • EJ EcoJet: Drum Louvers for Spiral Duct Applications • Door Grilles & Louvers • Textile & Industrial Grilles • SAG: Stamped Architectural Grilles : Accessories • OBD: Opposed Blade Volume Control for Square or Rectangular Duct Installation • RC: Removable Core Frame • SRAA VAV terminal modulates the supply airflow at constant temperature into an occupied space based on cooling demand. Nailor Industries Inc. Nozzle Diffusers. Mill. Toll Free: 866. US-DL is a supply/return drum louver with adjustable deflection blades and volume damper. February 12, 2020. Acoustic Media: Inorganic ,fire resistant , vermin and moisture proof sound absorbent rock wool of. High Capacity Ventilation Supply Module. Available in eight different core styles plus a wide selection of frames and borders. DL-SV - Long throw, high capacity split vane supply grille with rotating drum. PDF Viewing Options. Description. View Ruskin's Architectural Louver Solutions Gallery. Opposed blade dampers are supplied in. NOTE: White finish available. The 111, 121, and 131 Heavy Duty Series grilles feature an extruded aluminum blade that provides high volumes of supply air and long throw patterns. MODELS: 45DLC1 & 45DLC2 SPIRAL DUCT MOUNT . Nailor 51EC, 61EC, and 67EC Series Eggcrate Grilles and Registers feature high free area and a clean, crisp architectural look. The High Capacity Drum Louvers (HCD) consist of extruded aluminum blades mounted inside a rotatable drum to produce long air throws with a high degree of directional control. ECM motor / HEPA Filter. With user friendly software to control and commission diffusers, the Digital T3SQ is the. US-DL. Tom. Drum Instruction with accomplished drummer and teacher in Victoria BC. 0696 Have questions?US-DL is a supply/return drum louver with adjusts deflection blades or volume damper US300FL Aluminum universal finalize hat spiral grille, double deflection with 3/4" blade spacing, head blades parallel into longs dimensionLouver & Architectural. Available with louvers vertical or horizontal #8 x 11/4” lg. (727) 441-2651. Titus HVAC 16,431 followers 3y Report this post Our drum louvers are great for shopping malls, warehouses, sports. The high capacity long throws and rugged construction make them an ideal choice for any commercial / industrial application. Available with louvers vertical or horizontal #8 x 11/4” lg. Name Po's. The TMS is a square ceiling diffuser that delivers supply air in a true 360º pattern with low pressure drop. FFD. These versatile diffusers are available in 1, 2, 3 or 4-way. light troffer. The DLD is a versatile diffuser that can be used for supply or exhaust applications in any ceiling or sidewall. lt. TITUS OS-TLF-SS-12 1 TLF-SS, 12'', 48X24, 04 (In the dock) OS-TLF-SS-12ft EACH substitutes TITUS OS-T700L 1 T700L-20X14, 1, 26, A,. Steel heavy duty return grille, 3/8" blade spacing, 0 degree deflection, blades parallel to short. 00. Optional opposed blade damper has screwdriver adjustment accessible through face of register. Finish:Titus white epoxy powder paint. 45DL2, 45DL2-O • Two sets of Vanes • 2-Way Throw. PDF. #8 x 11/4” lg. DL-SV - Long throw, high capacity split vane supply grille with rotating drum. Dimensions are in inches (mm). METALAIRE is the flagship brand of Metal Industries Inc. Redefine your comfort zone™ | CS. Stainless Steel Drum Louver: DLSS. It is equally suitable as a one piece individual. ML Slot. General Catalog. Louver fixed in to damper casing 2015 Rev 2. The High Capacity Drum Louvers (HCD) consist of extruded aluminum blades mounted inside a rotatable drum to produce long air throws with a high degree of directional. On Air; Smoke Videos; Corporate Videos;. White, Satin Silver or Clear Anodized standard finishes. Effective air balancing begins with the balancing provisions that are designed into the HVAC system. The DLD is a versatile diffuser that can be used for supply or exhaust applications in any ceiling or sidewall. o. Titus CT linear bar diffusers are designed for both heating and cooling applications, supply as well as return. Read more. Class Schedule;. Manufactured of extruded or formed aluminum, each meets or exceeds the industry’s most stringent. Features + Drainable blade with vertical jamb gutterOur drum louvers are great for shopping malls, warehouses, sports arenas,. Titus balancing devices are easy to select and specify. US-DL is a supply/return drum louver with adjustable deflection blades and volume damper. means of the rotating drum and pivoted adjustable vanes. Products Control Damper Act. The wide array of slot widths allow for more CFM per. Aluminum louvered face diffuser. 45DL1, 45DL1-O • One set of Vanes • 1-Way Throw. Motors providing the facility to remotely rotate the drum for upward or downward distribution in accordance with a cooling or heating cycle. The Titus Spiral Drum Louver is the solution for this problem. Construction. Damper frame and Blade: High quality extruded aluminium profile of. The Titus linear slot ceiling diffusers are high performance, high quality diffusers designed for variable air volume systems. 7 Adams, Jordan QB 6-3 96 Adams, Titus DL 6-3 65 ** Austin, Greg OF 6-1 3 Beck, Harrison QB. Titus drum louvers are great for shopping malls, warehouses, sports arenas, factories and other large open areas where. TITUS OS-DL-25X10 1 DL-10X25, 1, 26 NO DAMPER (DRUM LOUVER) OS-DL-25X10 EACH substitutes TITUS OS-FL-10-48 2 FL-10, 48, 2CRA, SXX, 77, 26, HT, 0,S,0 OS-FL-10-48 EACH substitutes 11/17/2015. Turning Vanes in Each Quadrant. TDC Duct Connections Provided. Construction: The outlets shall have steel [HCD1] or aluminum [AHCD1] frame construction, and extruded aluminum drum and vanes. Steel Aeroblade Single Deflection Supply Grille, 1. Titus Eye Ball diffuser is fully adjustable and rotatable. Their pleasing appearance harmonizes with various architectural details, especially in modular ceiling systems. Class Schedule; Previous Webinars; Webinar Schedule; Titus Timeout Podcasts; Titus Tech Talk Blog; eLearning; Digital Media. December 2019. The DL provides long throws to supply air to spaces that cannot be served by ductwork and conventional outlets due to structural or architectural restrictions. Ruskin’s DLD drum louver diffuser series supply systems are designed to provide an air distribution system with the benefit of having directional air control. These diffusers can be used for ceiling, side wall, or sill installations. 761090. US-DL-SV - US-DL is a supply/return drum louver with adjustable deflection blades and volume damper; S301FS - Aluminum direct spiral duct mounted single deflection supply grille, 3/4" spacing with front blades parallel to short dimension. 4414. US-DL is a supply/return drum louver with adjustable deflection blades and volume damper. 2 For 0° multiply pressure by 0. Satin polish (SS only) o. Unit Heater Diffuser for 15'+ Mounting Heights. 84 likes. (727) 441-2651. 827 6. Titus Series TDC diffusers handle an unusually large amount of air for a given pressure drop and noise level. High Capacity Drum Louver. Drum Louvers. 300RL; 300RS; TI-GR-DL-H/V; Drum Louver. The new Titus Spiral Drum Louver (US-DL) is the perfect solution for these applications. Enter your email id to sign up for our Newsletters & Flyers. ECM motor / HEPA Filter. ESV-VP Single Duct with Factory Mounted Valve Pkg. 841451. For larger buildings and applications, an industrial strength air outlet is needed to provide the necessary air distribution. systems. , offering a complete line of air distribution and air terminal products. way back to 1909, when the company was founded. Class Schedule; Previous Webinars; Webinar Schedule; Digital MediaDL — Aluminum Drum Louver. The uniform, nearly horizontal jet from the outer cone maintains effective room air distribution even when the air volume varies over a considerable range. fusion vanesdifSand trap louvers are ideal in areas where the intake air velocities do not exceed 1 m/sec. 795CASE STUDY CORPORATE HEADQUARTERS Fossil Corporate Headquarters Richardson Texas Redefine your comfort zone™ CS Fossil Corporate Headquarters Richardson…Swirl Flow (Helical Diffuser) Titus Helical swirl flow diffuser are made in Steel construction with Helical Air pattern. Our equipment is used across a variety of commercial. FFD. TI-SF. BIMsmith has the most powerful free BIM tools available to help you find BIM objects that fit the specifications of any project. 1" 1-1/2 lb. VAV Diffuser Units Overview. Engineered Curb and Duct Packages. Attention! Your ePaper is waiting for publication! By publishing your document, the content will be optimally indexed by Google via AI and sorted into the right category for over 500 million ePaper readers on YUMPU. matt black finish. Round diffuser with adjustable discharge patterns. 827 647. Back to Sand Trap Louvers. or Best Offer. US-DL is a supply/return drum louver with adjustable deflection blades and volume damper US300FL Aluminum universal end cap spiral grille, double deflection with 3/4" blade spacing, front blades parallel to long dimensionDL - Drum Louvers. Get UPVC Aluminum Drum Louver, For Louvder, Size: Standard at best price in New Delhi, Delhi by M. 45DL2-O - Split Vanes • with Opposed Blade Damper. Opposed blade dampers are supplied in matt black finish. The TMS is a square ceiling diffuser that delivers supply air in a true 360º pattern with low pressure drop. Established in 1846, Tuttle & Bailey® is recognized as "The First Name in Air Distribution". US-DL-SV - US-DL is a supply/return drum louver with adjustable deflection blades and volume damper; S-DL - Long throw, high capacity aluminum supply grille with rotating. White or Mill finish. FFD - Standard construction, PSC motor, HEPA filter, 2ft x 2ft, 4ft x 2ft sizes. DRUM LOUVER PLENUM-DIFFUSER STANDARD FEATURES 1. DELUXE FLOOR REGISTER • Heavy-gauge, individually welded . It is equally suitable as a one piece individual. 300-RL. oPB Pole Operator Finish: oAL Aluminum o MIMillThe 6 way Drum Louver allows you to "spot" the air where you need it most. Omni Diffuser. MLTRI-39 - Aluminum modulinear slot return lay-in insulated diffuser, 1" slot. These devices can be for aesthetic or functional (direction and control) purposes with a wide. Drum Louvers; Industrial Outlets; Jet Nozzles; Perforated Grilles; Plaque Diffusers; Slot / Swirl Diffusers; Color Chart #00 Mill #10 Clear Anodized #12 Anodized Powder Coat #42 Gloss Black Powder Coat #43 Flat Black. Nailor 45DL Series Drum Louvers are designed to handle large air capacities and provide long throws. All Submittals Combined . , offering a complete line of air distribution and air terminal products. US-DL-SV - US-DL is a supply/return drum louver with adjustable deflection blades and volume damper. Light Commercial Plaster Ceiling Commercial ‘T’ Bar Ceiling Open Ceiling RRS’s 530 & 535 SERIES concentric diffuser systems are designed to provide a single point air distribution system with the added benefit of having directional air control. DRUM LOUVERS These extruded aluminum drum louvers are appropriate when high volumes of air are used and in spot heating and cooling applications. Comprised of cylindrical drum pivoted within a 1 1/4" outer frame gasketed on all four sides to minimize. Available with louvers vertical or horizontal #8 x 11/4” lg. 940. selkirkcorp. 5. Available with a highly weather-resistant PVDF or anodized finishes, Ruskin louvers can withstand the harshest environments. Our drum louvers are great for shopping malls, warehouses, sports arenas, factories and other large open areas where air must be thrown over a large distance. Fill form:. FFDE. High Capacity Drum Louver, Aluminum B 10/28/2022 Inches 1 3 RL-SP Spiral Duct Drum Louver - Universal Frame - Single Vane - Surface Mount Metal Industries 1985 Carroll Street, Clearwater, FL 33765 Phone: 727. Dimensions are in inches (mm). Motors providing the facility to remotely rotate the drum for upward or downward distribution in accordance with a cooling or heating cycle. ceiling applications that need single point supply air with long throws. US300FL. 310. +30˚ 0˚ -30˚ TYPE DL: Standard Drum Louvre available in sizes 1 to 8 TYPE DL/DO: Drum Louvre complete with rear mounted, screwdriver operated opposed blade damper. Accessories such as directional blades, dampers, blank-offs. Air Master Equipments Emirates is United Arab Emirates based Grilles & diffusers manufacturers & Suppliers company. 9mm thickness (standard); up to 1. Dorse & Company - Your Trusted HVAC Equipment ProviderTitus’ 300/350 Series return grilles define the standard for the industry. com (800) 992-8368. Spiral Grilles mount directly to the duct, eliminating the need for duct taps. With high quality and competitive pricing these grilles form the back bone of a standard offering that will meet any application requirements. Cap the open end of the duct. FFDE. MLTRI-38 - Aluminum modulinear slot return lay-in insulated diffuser, 3/4" slot. Models 45DLC1, 45DLC2 Page F168 Suffix '-DEX' adds a damper/extractor (air scoop) Models 45DL1, 45DL2 Page F170 Suffix '-O' adds a steel OBD Drum Louver (DL) Smoke Test Video Titus drum louvers are great for shopping malls, warehouses, sports arenas, factories and other large open areas where air must be thrown over a large distance. Model.