![]() An inefficient duct system can be easy to see if it’s not sealed properly, blowback will build up outside of the ductwork, which is both inefficient and unsightly. Often, engineers will specify HVAC construction systems with larger and more expensive fans to produce the required airflow, simply to compensate for duct leakage. Duct leaks also make fans and other HVAC equipment work harder to maintain the desired building temperatures, increasing energy usage and reducing system efficiency. When ducts leak, HVAC systems require larger and more expensive fans to produce the required airflow. In addition to airflow, duct leakage is a major concern of building designers and owners. By decreasing the drop in air pressure and increasing airflow efficiency, spiral duct allows the use of smaller, less powerful and less expensive air-moving units. In typical spiral duct systems, this pressure drop is less than the one experienced by air flowing through rectangular ductwork. Air leaving an air handler under high pressure drops to lower pressures as it travels through straight ducts, bends and diffusers to its destination. If the system fails to deliver the proper airflow, building occupants will turn temperature settings up or down more than should be necessary to meet their comfort needs, which in turn boosts energy use and costs.Īnother key airflow issue concerns pressure. In buildings, spiral ductwork can be a major asset to an HVAC system, which requires power to drive the fan or blower unit that moves air through the ductwork to various locations in the building. ![]() Many of these benefits can be realized further with the use of self-sealing connections such as Complete Seal, or flanged connections such as E-Z Flange. Spiral duct is also relatively inexpensive to install and provides an aesthetic asset once in place. Advantages of spiral duct include efficient air movement and minimal leakage, which can help reduce the energy needs of HVAC systems. One choice that has much to offer in both new construction and renovation of commercial buildings is spiral ductwork. That’s why many of today’s smart HVAC system designers and specifiers are carefully considering their ductwork options. But there’s another part of the system that has a major impact on performance and efficiency: the ductwork. So when designing an HVAC system, engineers often focus on the more costly mechanical components such as chillers and air handlers. Duct board will satisfy the R-Value needed without affecting your overall look and typically is cheaper than the traditional double wall spiral.Of course, one way to meet sustainability objectives is to specify more efficient, green HVAC equipment. If so, we would recommend going with an internally lined spiral and using duct board liner. Does your project require a certain R-value to meet code or condensation concerns? Galvanized, paint grip and powder-coated.ĥ. Other popular options that HMF carries are a 1” hanging strap or allthread with strut. This specific hanging material not only saves you field labor, but also gives you a clean line and almost disappears into the backdrop. Our first choice would be using a gripple loop to hang your project. Yes, all of the options get the job done, but the curved register offers you a seamless look to complete your exposed job.Īgain, there are many options out there to use to hang your spiral, but not all of the options are aesthetically pleasing. The most popular options are a curved register that directly mounts to and matches the radius of the pipe, a universal spiral register, or a register box with a typical sidewall or double deflection register.
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