Rectangular Duct[2]
Overview
Rectangular ducts are a standard component in modern HVAC systems, primarily used for air distribution in commercial, industrial, and institutional buildings. Their flat-sided design allows for efficient use of space, particularly in areas with height restrictions. These ducts are manufactured in standardized sizes but can also be custom-fabricated to meet specific project requirements. Compared to round ducts, rectangular versions offer easier integration with building structures and simpler installation in tight spaces. They are typically constructed from galvanized steel for general applications, though aluminum, stainless steel, and fiberglass options are available for specialized environments.
Structure and Working Principle
Rectangular ducts consist of four flat panels joined at the edges, forming a hollow rectangular conduit for air movement. The panels are typically joined using Pittsburgh locks or standing seams for strength and air tightness. Internal turning vanes may be installed at bends to maintain airflow efficiency. The working principle is straightforward - conditioned air from HVAC equipment flows through the ductwork, with the rectangular shape providing a large cross-sectional area for air movement. The flat surfaces make it easier to mount dampers, diffusers, and other accessories compared to round duct systems.
Key Features
Space efficiency is the primary advantage of rectangular ducts, as their flat surfaces can be installed flush against walls or ceilings. They offer excellent structural rigidity, especially in larger sizes, reducing the need for additional support. The modular design allows for easy customization with access doors, dampers, and other components. Rectangular ducts provide better pressure distribution in long runs compared to round ducts of equivalent cross-sectional area. Their standardized dimensions simplify the design process and enable prefabrication, which can significantly reduce installation time on job sites.
Application Areas
Rectangular ducts are widely used in commercial buildings such as offices, schools, hospitals, and shopping malls where space optimization is crucial. They are particularly suitable for main supply and return air runs in large HVAC systems. Industrial applications include factories and warehouses where large air volumes need to be distributed efficiently. Specialized versions find use in cleanrooms, laboratories, and food processing facilities where material choices like stainless steel prevent contamination. The ability to incorporate insulation within the duct assembly makes them suitable for both heating and cooling applications in various climates.
Maintenance and Precautions
Regular inspection of rectangular ducts should include checking for air leaks at joints, which can significantly impact system efficiency. All seams and connections should be properly sealed with approved duct sealants. Internal cleaning may be required periodically to maintain air quality and prevent microbial growth. Proper support is essential, with hangers spaced according to duct size and local codes. Care should be taken during installation to avoid deformation of the duct walls, which can create turbulence and increase pressure drop. Insulation must be properly installed and maintained to prevent condensation and energy loss.
B2B Procurement Guide
When procuring rectangular ducts in bulk, consider the material grade appropriate for your application environment. Galvanized steel (G90 coating) is standard for most commercial uses, while 304 or 316 stainless steel may be required for corrosive environments. Request certified pressure ratings and leakage test reports from manufacturers. For large projects, explore modular prefabricated systems that can reduce on-site labor costs. Compare prices from multiple suppliers, but prioritize quality of seams and joints which affect long-term performance. Consider lead times and the supplier's ability to provide custom fittings and accessories to match your duct specifications.
Related Manufacturers
- 主营：--
- 主营：--
- 主营：余压阀、散流器、消声器、法兰风管、不锈钢风管、镀锌钢板风管、止回阀、换气扇、防火阀、静压箱、百叶风口、装饰风口、旋流风口、格栅风口、排烟风机、车库排风、射流风口、手动调节阀、防火调节阀、铝合金风口、电动多叶送风口
- 主营：--
- 主营：--
- 主营：生物除臭箱、PP喷淋塔、PP废气净化塔、PP风管、PP风机、PP塑料防腐风机、PP活性炭吸附箱、PP工业离心风机、PP离心式引风机
- 主营：玻璃钢管道、玻璃钢夹砂管道、玻璃钢排水管道、玻璃钢通风管道、玻璃钢风管、玻璃钢排污管道、玻璃钢工艺管道
- 主营：一体化泵站、污水池盖板、喷淋塔、玻璃钢有机风管、净化塔、吸收塔、生物除臭箱、吸附箱、风阀、玻璃钢管件、玻璃钢管道、烟囱、一体化污水泵站、生物滤池、FRP生物滤池、玻璃钢雨水泵站、一体化雨水泵站、玻璃钢水洗塔、污水池拱形盖板、污水池顶盖、玻璃钢脱硫塔、玻璃钢除臭喷淋塔、玻璃钢碱洗塔、玻璃钢吸收塔、玻璃钢生物除臭箱
- 主营：玻璃钢储罐、玻璃钢管道、玻璃钢蝶阀、玻璃钢风管、玻璃钢通风管道、玻璃钢电机罩、玻璃钢管件、玻璃钢法兰、玻璃钢弯头、玻璃钢异形件、玻璃钢夹砂管道、玻璃钢化粪池、玻璃钢水罐、玻璃钢格栅、玻璃钢风阀、玻璃钢检查井、玻璃钢观察井、玻璃钢隔油池、玻璃钢酸碱储罐、玻璃钢电缆管、玻璃钢穿线管、玻璃钢方管、玻璃钢污水池盖板、玻璃钢一体化泵站、玻璃钢净化塔
- 主营：废气处理设备、不锈钢喷淋塔、玻璃钢生物除臭塔、玻璃钢通风风管、阻燃玻璃钢风管、玻璃钢废气风管、生物滤池除臭系统、一体式生物除臭设备、防腐玻璃钢生物滤池、玻璃钢喷淋塔、玻璃钢酸雾废气净化塔、玻璃钢废气吸收塔、玻璃钢除臭喷淋塔、工业废气喷淋塔、耐酸碱喷淋塔、玻璃钢活性碳吸附池、玻璃钢活性炭箱、活性炭吸附箱、玻璃钢废气吸附塔、玻璃钢拱棚盖板、玻璃钢防臭盖板、玻璃钢复合盖板、玻璃钢储罐、玻璃钢复合储罐、立式玻璃钢储罐
- 主营：排烟管、镀锌风阀、镀锌方管、镀锌风管、风管安装、法兰风管、风管配件、通风管道、螺旋风管、防火风管、焊接风管、圆形风管、不锈钢风管、管道配件、三通弯头、螺纹管道、角铁法兰、角钢法兰、弯头管道、矩形空调、消音管道、法兰圆弯头、法兰方弯头、消音静压箱、方变圆管道
- 主营：管道、白铁皮管道、镀锌管道、风管、螺旋风管、镀锌风管、白铁皮风管、共板法兰风管、角铁法兰风管、矩形风管、圆形风管、空调风管、通风风管、厂房通风管道、排风管道、中央空调风管、工业通风管道、螺旋管道、车间除尘管道、排气管道、排烟管道、消防排烟管道、新风系统管道、不锈钢管道、河北白铁皮加工厂
- 主营：通风管道、不锈钢风管、螺旋风管、角铁法兰风管、共板法兰风管
- 主营：玻璃钢管道、玻璃钢法兰、玻璃钢弯头、玻璃钢除臭风管、玻璃钢檩条、玻璃钢工字钢、玻璃钢平盖板、玻璃钢拱形盖板、玻璃钢储罐、玻璃钢喷淋塔、玻璃钢脱硫塔、软连接、玻璃钢风机、玻璃钢格栅、玻璃钢电缆桥架、光伏走道板、锌铝镁走道板、玻璃平板、玻璃钢拉挤方管、玻璃钢异形件、玻璃钢三通、玻璃钢变径、玻璃钢矩形管、有机玻璃钢管道
- 主营：玻璃钢管道、玻璃钢法兰、玻璃钢弯头、玻璃钢风管、有机玻璃钢风管、玻璃钢蝶阀、玻璃钢污水池盖板、玻璃钢生物滤池、玻璃钢除臭箱、玻璃钢储罐、玻璃钢角钢、玻璃钢方管、玻璃钢圆管、玻璃钢排水管、玻璃钢止回阀、污水池盖板、玻璃钢拱形盖板、玻璃钢异形件
- 主营：实验台、通风柜、危险品安全柜、pp风管、防爆柜、天平台、气瓶柜、器皿柜、通风橱、高温台、实验室通风系统、减震工作台、实验室通风柜、药品存放柜、原子吸收罩、实验室家具、通风柜通风橱、化验室工作台、喷淋塔、万象排气罩、实验室排风系统、实验室设备、实验室气路系统、集中供气系统、活性炭吸附箱
- 主营：实验室实验台、实验台、通风柜、通风管道、全钢实验台、全钢通风柜、实验室家具、实验室装修、实验台厂家、全钢通风橱、单人位全钢通风柜、双人位全钢通风橱、无尘全钢通风柜、不锈钢试验工作台、钢木实验台、实验室中央操作台、pp实验桌、耐酸碱药品柜、化验室装修、天平台、桌上型通风橱、全钢气瓶柜、pp试验操作台、通风橱、中央操作台、全木实验台
- 主营：高分子聚乙烯板材、聚丙烯异形件、pp加工件、方形塑料水箱、pp风管、塑料耐磨件、PE板、聚四氟乙烯板、尼龙异形件、pp塑料水箱、铺路板、路基板、超高分子聚乙烯板、自润滑pe板、pom异形件、pp工程塑料板、PVC硫酸池、HDPE塑料加工件、pp异形件、异形工装板、注塑件加工、养殖箱、聚乙烯链条导轨、打桩机锤垫、耐磨尼龙件
- 主营：酒店排烟、车间暖通、螺旋管道、矩形风管、排烟风管、螺旋风管、不锈钢风管、排气通风管道、通风管道阀门、厨房通风管件、厨房油网、管道配件、厨房排烟罩、镀锌螺旋管、油烟收集罩、不锈钢油烟、管道圆形配件、不锈钢螺旋管
- 主营：双面彩钢玻纤复合风管、漂珠硅晶复合风管、钢面镁质复合风管、彩钢酚醛复合风管、一体化防排烟复合风管、双面彩钢复合风管、304不锈钢风管、耐火复合风管、防火复合风管、单面彩钢复合风管、螺旋风管、碳钢风管、无机硅晶复合风管
- 主营：焚烧炉、镀锌板、排烟管、通风管、pvc风管、304风管、环保风管、排风管道、镀锌风管、锌层风管、车间风管、热风管道、排烟风管、方形风管、螺旋风管、除尘风管、共板风管、净化风管、废气处、净化工程、镀锌管道、消防排烟、排废管道、环保设备、镀锌钢板
- 主营：风管调节阀、轴流风机、不锈钢水箱定制