The perforated inner shell has 3/32” diameter holes staggered at 3/16” on center for a clear open area of 23%. Double-wall rectangular ducts utilize the same outer metal shell and insulation media as our Internally-lined rectangular ducts, but have an additional metal inner shell between the insulation and the airstream. Search in content. > Download Specs Only (PDF) This certification mark indicates that the product has been tested to and has met the minimum requirements of a widely recognized (consensus) U.S. Semco, Columbia, MO, specializes in providing customized duct in situations with exacting deadlines. I tell them there is a price premium involved with spiral duct and double-wall but i don't know what the number is. CaptiveAire’s factory built, listed double wall grease ductwork is ideal for use in applications where clearance to combustibles is needed. To make all this work, VM Systems had the ductwork shipped to the shop and then transported the pieces to the jobsite on company trucks. SEMCO Energy Gas Company reminds customers to please call miss-dig – 811- before doing any digging or excavation. Double wall duct is manufactured completely assembled with TDC corners installed. Biyang Double Wall Spiral Duct is also named Dual Wall Spiral Pipe, Double Wall Round Duct, and Double Wall Insulated Duct. The material was lifted by crane from the trucks and directly into the installed space. You can reach us at 1-877-572-0000 for assistance 7:00 am to 4:30 pm central time. This certification mark indicates that the product has been tested to and has met the minimum requirements of a widely recognized (consensus) U.S. • Acoustical double wall duct for noise control Acoustical Double Wall semco. Langdon offers double wall round ductwork, double wall spiral ductwork, double wall rectangular ductwork and double wall flat oval ductwork in spiral lockseam and longitudinal seam. Fittings length Give your round and flat oval ductwork the increased performance with Thermaduct’s Inspiral R and Floval Duct Systems. Call us today and place your Order: Phone: 877-237-3828 Fax: 813-413-8377 E-mail: CDSLLC@commercialduct.com 9707 … COMMERCIAL DUCT SYSTEMS . B. Ducts: Fabricate double-wall (insulated) ducts with an outer shell and an inner duct. SMC’s most popular types are as follows: Tie Rod Reinforcement: threaded inserts installed into each end o f thin wall (emt) conduit. This double-wall, insulated ductwork is constructed of a solid metal outer pressure shell and a metal inner liner with a layer of insulation sandwiched between. 5. Double wall ductwork construction consists of perforated liner on the spiral duct, a solid liner on the fittings, a layer of fiberglass insulation, and a solid outer pressure shell. • Thermal double wall duct for temperature control. A traditional spiral duct system may be more efficient than the average rectangular duct, but double wall spiral ducts offer even more efficiency in terms of energy costs. Ceiling & floor computer room AC units, chilled water, air cooled, water/glycol cooled. Specification Compliance These are installed internally at both the joint and/or intermediate duct spacing. length 4” acoustical vane ………..72” max.length. Download the SEMCO CustomAir duct catalog. Constructed of a perforated inner shell surrounded by a layer of insulation and covered by a solid outer shell. Its unique inter-locking, double sealing joint system ensures minimal leakage while its superior panel jacketing combined with an additionally factory applied weather resistant cladding ensures the maximum in protection from the elements. Double wall grease duct is ETL Listed to UL Standard 1978 and UL Standard 2221- Grease Duct Enclosure Assemblies. Single-wall round and flat-oval ducts and fittings. General e-mail support: (function(){var ml="d.4utm0p%sorc",mi="9377:;482695<03<41<:5",o="";for(var j=0,l=mi.length;j Rectangular Double Wall Duct Product Pages, Specifications for Rectangular Double Wall Duct & Fittings Sheet Metal Connectors, Inc. double wall rectangular duct and fittings are one part of our complete line of HVAC products. SEMCO’s acoustic plenum panel system offers performance engineered assemblies made of quality constructed double wall panels. UL listed, requires No Welding - Single Wall & Reduced Clearance: UL1978 and Double Wall Zero Clearance: UL1978 & UL2221, Limited Lifetime Warranty. Materials: Medium pressure double wall round and oval ductwork shall have outer pressure sheet from spiral lock seam up to 36-inch diameter round and 22-inch minor axis oval. I needed to add Double-wall ductwork in one of the Projects that I am working on. The perforated inner shell has 3/32” diameter holes staggered at 3/16” on center for a clear open area of 23%. The Kingspan KoolDuct System is easy to handle and install. Acoustical Double Wall Standard acoustical double wall is for noise control. Read more. Our constant aim is to provide systems that precisely deliver the best indoor air quality and performance, as well as maximize energy efficiency. Both the inner and outer spiral duct is fabricated with spiral lock seam constructi… There are two different types of applications: 7. 3. Maximum Unsupported Vane Length HAS A WIDE SELECTION OF VENTS, ... Comes standard with a double end Phillips bit (1/4" end) and a double end slotted bit on the 5/16" end. R-Angle Reinforcement: roll formed pre-punched angle iron reinforcement. 3.25 in. Double wall fittings are completely assembled with all accessories (TDC corners, vane & rail, etc…) installed. 2. FLAT OVAL . Dual-Wall ROUND DUAL-WALL ROUND SPIRAL DUCT AND FITTINGS CONSTRUCTION STANDARDS Outer Shell Positive Pressure Gauge selection for galvanized (ASTM A653), paint grip steel, and types 304 and 316 stainless steel. All rights reserved. Double wall spiral ducts are, as the name suggests, comprised of two walls. Independently tested to fit your application acoustical double wall spiral ducts are as. An unfinished basement TDC end treatments i just ca n't find an option to do.... Desiring exposed structure and hence exposed ductwork and allow us to collect information about how you with. 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