UnderDuct Brochure

Quality Solutions...QuickUnderDuct™ is the preferred solution for underground HVAC and industrial exhaust needs. FRP - Fiberglass Reinforced PlasticUnderslab DuctOverview:UnderDuct by Monoxivent provides the most versa-tile and cost effective Underground FRP (FiberglassReinforced Product) Duct on the market today Un-derDuct provides a wide range of solutions for themost demanding environments to standard layouts.Monoxivent’s manufacturing source has over 40 years of experience and is a leader in the Under-Slab Fiber-glass Duct production. Monoxivent has a nation-wide network of sales representatives and a top-tierinside support crew, which provides engineering, de-sign, sales, service, and marketing. UnderDuct is of-fered both as single wall and pre-insulated doublewall duct to meet any ventilation needs. Monoxivent824 Low Smoke Class 1 duct has been approved fordirect burial. Markets:Supply, return and exhaust systems include, but arenot limited to:• Auditoriums • Auto Exhaust• Banks• Botanical Gardens• Churches• High Rise Offices• Hospitals• Libraries• Parking Garages• Residences• Restaurants• Schools• Super Markets• Swimming Pools• ZoosUNDERSLAB FRP DUCTDurability:Monoxivent UnderDuct provides excellent resistance to corrosion andboth the inside diameter (ID) and outside diameter (OD) allowing for awide range of applications.Ease of Use:Monoxivent UnderDuct can be directly placed onto a pea gravel bed ina graded trench, then backfilled with pea gravel eliminating concrete en-casement. Simple joining methods provide for easy and quick installa-tion, and the FRP duct is impervious to minerals or salts present in soil.Efficiency:Monoxivent UnderDuct systems can be sealed to achieve a water and airtight system. A leak free system and smooth interior surface will ensurethe air reaches its destination efficiently and without contamination.Material Integrity:Monoxivent UnderDuct is filament wound with two chemically inertlonger underground service life than galvanized sheet metal, stainlessgreater hoop strength resulting in a stronger duct versus other methodsthan steel while offering superior acoustical qualities and corrosion re-sistance.Testing:Monoxivent UnderDuct products have met the Flame and Smoke re-quirements of a Class 1 duct per Underwriter’s Laboratories (UL) 181and Uniform Mechanical Code (UMC) 10-1. We are verified by anASTM E-84 testing laboratory recognized by the following buildingcode organizations under the Council of American Building Officials:ICBO; BOCA; SBCCI.Versatility:Monoxivent Underduct is available as straight lengths, standard and cus-tom fittings, or in shop fabricated sections. Single wall duct can beshipped in prefabricated assemblies. Pre-insulated double wall duct hasmany advantages, including assured uniformity of insulation, permanent protection of insulation, and all in one installation.THE UNDERDUCT ADVANTAGEUNDERSLAB INSTALLATION ? Typical Installation:Underslab installation is typically laid on a 4” bed of peagravel in a graded trench with good drainage. While the sheetmetal register boots are in place and sealed, they will be cov-ered with sand or pea gravel, and the floor slab may be pouredwith no delay. Register Boots and Transtitions may also bespecified with FRP construction.Duct can be manufactured with a resin rich veil on the OD ininstallations where water infiltration is a threat. In this case,the field joints would be made using the wet lay-up method asdescribed in the installation instructions.NOTE: Leak test the system before backfilling.Double Wall Fittings & DuctAny configuratuion available.Double wall Monoxivent UnderDuct will eliminate any ther-mal losses and save time and money compared to insulatingon site. When supplied with the standard 1” insulation, theduct has a k factor of 0.14 and an R value of 7. Also availablein R-5, R-10, R-14 by request.Our Class 1 rated single wall duct, meets 25/50 ?ame/smokerequirements of UL 181. Monoxivent UnderDuct 824 LowSmoke has been accepted for HVAC and occupied Industrialareas. Excellent choice for Corrosive environments where?ame and smoke development are a concern, such as laborato-ries and swimming pools.Single WallAny configuratuion available.CONFIGURATIONS ? Configuration Options:SHAPE Round, rectangular, and oval are the typical ?lament wound construction shapes.Upon requests, shapes such as triangular and others are available. Quali?edMonoxivent sta? is available for designing projects requiring non-standard con-struction.DIAMETERDuct diameters are available from 2”-144”, and rectangular sizes as required foryour projects. Monoxivent’s 824-API pre-insulated double wall duct is alsoavailable in the above ranges.WALL THICKNESSDuct wall thickness ranges from 1/8” to 1” (increasing in increments of 1/16”).Wall thicknesses are available for abnormal burial depths or other special loadingrequirements. Standard ductwork is furnished with the following minimum wallthickness as set forth in ASTM D 3982,PS 15-69 and SMACNA Fiberglass stan-dard:Diameter Wall Thickness2” to 20” .125inches21” to 36” .187inches37” to 60” .250inchesLENGTHSStandard length is 10’-0”. Lengths up to 40’ are available.FITTINGS Standard ?ttings included:Elbows, Tees, Laterals, Y’s, Reducers, Dampers, Registers, Boxes, Square-to-Rounds, Crosses, FlangesCOLORSA wide range of colors are available for overhead exposed applications. Please refer to the supplemental color chart for complete details.UNDERDUCT FITTINGS & JOINTSScrewGalvanized Sleeve 6”Mechanical JointPressureSensativeTapeGlass, ResinWrapWet JointFittingsElbow, 90°SealantElbow, 45°ConcentricReducer 90° TeeCrossEccentricReducer LateralSquare toRoundY Piece? Installation & Joining:Generally, for underslab installation, the duct will be installed in agraded trench with good drainage and on a 4” bed of pea gravel, withsand or pea gravel used as a back?ll. The duct will be joined by an inter-nal galvanized sheet metal sleeve held in place by sheet metal screws andthen sealed with a UL listed duct sealer. A wrap of Monoxivent 6” widepolyethylene-backed pressure sensitive tape shall be placed over thejoint, as well as the screw heads.When installation is to be made where water in?ltration is a threat, theduct will be manufactured with a resin rich veil on the OD. The ?eldjoints will be made using the wet lay-up method.Manufacturer’s installation instructions are to be followed. See separatesheets for wet lay-up method instructions. The system is to be leaktested prior to back?lling.SAMPLE SPECIFICATION QUALIFIED ENGINEERING ASSISTANCE IS AVAILABLE TO COMPOSE SPECIFICATIONS FOR EACH INDIVIDUAL PROJECT.DUCTWORKSINGLE WALL (MONOXIVENT 824 LOW SMOKE) ANDPRE-INSULATED DOUBLE WALL (MONOXIVENT 824-API)• Ductwork, including ?ttings, shall be constructed of ?lament wound ?berglass reinforced plastic, as manufactured by Monoxivent. The resin shall be Monoxivent 824 Low Smoke.• All surfaces of Duct and ?ttings, as a ?nished composite will meet the Flame and Smoke requirements of the Class 1 duct per UL 181 and UMC 10-1. Liners, and or coatings, are not acceptable. Veri?cations of performance shall be done by an ASTM E-84 testing laboratory recognized by the following building code organizations under the Council of American Building O?cials: ICBO; BOCA; SBCCI• Wall thickness shall comply with SMACNA, ASTM D 3982 and NBS PS 1569 ?berglass duct standards. The ductwork will be furnished with the following minimum wall thickness .0125” for ducts up to 20” in diameter, 0.187” for ducts 21” to 36” in diameter, and .025” for ducts 37” to 60” in diameter.• Rectangular ductwork thickness will be determined by substituting the long side for the round diameter.• Underground supply and/or return air plenums shall be made of the same material as the duct.• Monoxivent 824-API pre-insulated double wall duct will have 1” of insulation, with a k factor of 0.14 and R value of .7. Insulation shall be laminated in place at point of manufacture.REQUIREMENTS OF A CLASS 1 DUCT PER UL 181 AND UMC 10-1Flame Spread: less than 25Smoke Development: less than 50Fuel Contributed: less than 10Additionally, the resin shall conform to or be less than the values of the New York State Fire-Gas Toxicity Data.1306 Mill Street, Rock Island, IL 61201 | 309.794.1000 TF: 877.608.4383 www.underduct.com | info@monoxivent.com