Countless real-world examples where a contractor or manufacturer converted a mostly rectangular duct design to round and flat oval spiral duct, have proven you can get better performance at a better installed cost.But if you don’t use those symbols above and indicate you want round and flat oval duct for your project, you will almost certainly get rectangular duct.
are based upon the outer shell, not the inner.Spiral Pipe of Texas has been a pioneer in the use of Johns Manville Spiracoustic PlusThe product is a high-density fiber glass board with a factory-applied black acrylic coating applied to the surface and transverse edges, JM’s PermacoatSpiral Pipe of Texas single-wall insulated duct with Spiracoustic Plus® liner may have some advantages for your project over traditional double-wall insulated products.

In a perfect world (at least for us) the LEED guideline would simply state “Use round and flat oval spiral ducts and fittings from Spiral Pipe of Texas — and here’s your points!” Unfortunately, it’s not that simple. Fitting dimensions (elbow centerline radii, tee fitting length, tap clearance to end, etc.) Let’s look further at some of theThe only mechanical seams that do not have to be sealed under this standard are the spiral lock seams of spiral duct. Roladuct is Australia's market leader for Spiral Formed Ducting and Piping. First, many of the “green” features of our products are not even things you can get LEED credits for. Ducting, ducts or ductwork are pipes or tubes, that typically form part of a ventilation system.Spiral ducting is a circular (round), spirally wound length of duct.This type of ductwork is generally cost-effective as it can be made with 32% less sheet metal than rectangular ducting. Unless noted otherwise, double-wall ducts are fabricated in accordance with Chapter 8 of the SMACNA HVAC Duct Construction Standards Metal and Flexible (Third Edition – 2005) and the outer shells are constructed in accordance with Chapter 3 of the same standard.It is important to note that the dynamic airflow performance of a duct system is based on the inner shell, and most duct sizing on mechanical drawings are I.D. It is an important first step in promoting “green” construction in commercial buildings. At Spiral Pipe of Texas, our home area of the Central and Southern US encompasses regions with high fluctuations in both temperature and humidity. To be fair, if you have a product where environmental consciousness was not previously a concern, it is a good idea to find out what is “green” about your product, try and do better, and reassure consumers that you care. Split Clips have two suspension points: one on each side of the duct, offering a more secure fitting. AgION™ antimicrobial-coated steel ductwork is durable and should be incorporated into HVAC systems. Using it, you can see the actual performance efficiencies of round and flat oval spiral ducts and fittings over equivalent rectangular ducts. There are quite a few options available for double-wall ducts, so it’s important that critical features are specified. Sizes - from 80mm to 300mm Diameter. We are limiting customer service interactions to PHONE and EMAIL ONLY however our offices are closed to in-person visits. Because round ducts are inherently stronger than rectangular profiles, they can be lighter metal gauges and can be installed in longer spans. The following are potential sources for LEED credit:So, we hope this answers the question “Are Your Products Green?” Spiral Pipe of Texas is proud to make products that are “green” throughout their history and origin, in their manufacture, and through their use. Ventilation - Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more; Related Documents . Round Selection Chart. Larger sizes are also available upon request. So if you just haven’t been designing round and flat oval spiral duct because you couldn’t find the right symbols, give us a call. More and more owners and engineers are requesting it for its effectiveness in inhibiting the growth of damaging bacteria, mold and fungi. Continuously welded seam fittings are available if specified. 2005 SMACNA 10” WG 1995 SMACNA 2” WG 1995 SMACNA 10” WG DUCT SPIRAL SPIRAL SPIRAL DIAMETERDUCT FITTINGSDUCTFITTINGS DUCT FITTINGS 3” … If you could do just one thing to your duct design that would make it more energy efficient and less expensive, would you do it?You might recognize the two symbols above. We make diameters ranging from 3” to 92” and metal thicknesses from 26 gauge to 16 gauge. Smaller sizes may also be corrugated. Our products greatly outperform the energy codes with only half the leakage that is allowed.And we take duct leakage seriously, because it’s considered to be the single largest preventable energy waste in commercial and residential buildings — even more of a waste than leaving lights and A/C on when the building is unoccupied.

They have been proven to have almost no inherent leakage. Ducting Express can supply ductwork in 3 meter lengths from 80mm-900mm in diameter. Spiral lock-seams have practically no leakage, and are the only mechanical seams exempted from sealing under energy standards such as ASHRAE Standard 90.1-2013.At Spiral Pipe of Texas, we make products that meet or exceed the SMACNA HVAC Duct Construction Standards – Metal and Flexible (2005). Approximately 70% of all steel and 30% of all zinc consumed are made of recycled material. The insulation is protected from external damage — a critical concern for ductwork on rooftops and out of the building envelope. Our major strengths are:

Check with the plant when ordering.
100 lineal feet of 18”φ spiral duct Ten 10’-0” lengths of spiral duct = 9 joints 18” x π x 9 joints = 509 lineal inches of sealing.

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