Air Duct

HVAC Air ducts are used as passages to deliver or remove the air, they keep internal environment of the buildings in stable or controlled air flow. The duct systems are designed for the equal distribution of the air flow throughout the area we need to be getting covered. Those HVAC ducts can be used in both commercial and residential building. During the installation of ducts, it must be ensured that the ducts do not leak substantially. The duct systems should be insulated with any kind of thermal materials to protect from the energy loss. The ducts are the easier and cost effective method to get the air anywhere throughout the buildings.

TYPES OF AIR DUCT

RECTANGLE DUCT

Rectangular duct is the most common form used for HVAC. Produced from galvanized steel sheet, stainless sheet (or) other type metal sheets or designed to complain with SMACNA & ISHRAE standard. The rectangular ducts designed to withstand strong vibrations and various level of pressure that Accor during operation of air conditioning systems in all type of building .The rectangle duct prefabricated from the factory in square or L – shape to facilitated easy installation and transportation.

TDF DUCT

TDF is a flanging system that consists of forming a flange profile on the duct ends. This made out of a sheet from which the duct is fabricated TDF is a 4 bolt duct connection system that eliminates time wastage. Rather than using separate connection to assemble your system. TDF flanges are roll formed on to duct during the manufacturing process. This connection minimizes leakage and installation costs, These TDF flange eliminates the additional internal sealing around the edges of duct & there by saves the labor & material.

Features

Highly accurate flange profiles and components ensure ease of fitting and high quality assembly.
A Recessed groove on flange and radial groove on corner pieces for proper gasket seating.
Snap fit corner pieces to allow easy fitting at sites.

SLIP & DRIVE CLEATS DUCT:

Slip and Drive Cleats system is generally used for low-end, less- critical applications. Traditionally, only the Drive Cleats (“C’’) which are positioning cleats were used for all four sides. This was giving a poor joint. The Slip cleats (“S’’/ Standing S”) on the alternate opposite moderate rigidity to the joint. While installing, Drive cleats are always fitted on the shorter sides and Slip cleats on the longer sides. Designed to reinforce the connection on the wider ductwork applications and to secure the connection for lighter ductwork applications.▪ Perfect for lighter gauge and residential ductwork applications.

SPIRAL DUCT

SPIRAL ROUND DUCT

Produced from galvanized steel sheet, stainless sheet (or) other type metal sheets or designed to complain with SMACNA & ISHRAE standard. The spiral round duct is produced by duct formatting machine with strong spiral seams providing reinforcement that or made to meet the standards. They specifically state “Round duct is preferred over rectangular duct. However, space (height) restrictions may require flat oval ductwork to achieve the low-turbulence qualities of round ductwork.” you don’t even have to be an engineer to know those square corners of rectangular ductwork cause far more turbulence than no corners (round) or rounded corners (flat oval). You’ve probably heard or used the term “built in accordance with SMACNA”. That’s most often referring to the “SMACNA HVAC Duct Construction Standards – Metal and Flexible”. It is an excellent structural standard that’s mostly showing you one thing — how to limit deflection. Whether dealing with how much an assembled length of duct deflects or how much the walls of a duct deflect, the goal is to keep a duct system as static and motionless as possible. Flat surfaces deflect. Round/curved surfaces have little-to-no deflection in positive and low pressures. The SMACNA manual will have you increase the gauges or add reinforcing to limit deflection. So not only do you have to increase the amount of duct (perimeter) to reduce pressure loss and noise, you also have to increase the weight of that perimeter to reduce deflection. So the choice should be clear. Round spiral duct is the best choice for duct construction, but if you don’t have the room, flat oval is still a better choice than rectangular duct.

SPIRAL OVAL DUCT

Produced from galvanized steel sheet, stainless sheet (or) other type metal sheets or designed to complain with SMACNA & ISHRAE standard. Spiral oval duct is formed from duct spiral round duct in to flat oval shape. Spiral oval duct in a combination of the design from round duct and rectangle duct which provides benefits of less friction loss and space limitations in some installation areas where by space is restricted. The installation space taken up by spiral oval flat duct is similar to rectangular duct. The accessories for spiral flat oval duct or professional produced to ensure all join and elbows or fitter perfectly to avoid air leakage. Other ideal usage is spiral oval duct adds well aesthetically appeal for interior designing. Flat oval spiral duct also features our 4-ply lock seam for strength and airtight construction and is available in both plain and double beaded profiles. The biggest advantage of a flat oval duct system is that it will fit easily in confined spaces. Flat oval duct features the best characteristics of both rectangular and round duct. It fits in spaces too confined for round duct but can be joined using the simpler round duct assembly techniques, and has considerably less flat surface area susceptible to vibration and deflection. Flat oval duct is machine formed from round spiral duct using sizing mandrels which provide exceptional dimensional consistency. Flat oval duct is available in single and double wall construction and is produced in galvanized steel, stainless steel, and poly-vinyl coated steel. Flat Oval Fitting construction is lapped, spot-welded and sealed or is continuously welded. Flat oval duct is for positive pressure applications only, unless special designs are used.

ALUMINIUM FOIL FLEXIBLE DUCT

The flexible ducts serve as a compliment to ventilation duct are made of aluminum foil and PET film layers. Aluminum foil flexible ducting is manufactured from a reinforced, multi-ply aluminum polyester laminate and a high tensile steel wire helix for additional strength. This extremely lightweight, flexible, air extraction ducting comes with fire resistant properties and a recommended maximum operating temperature of +120°C - making it suitable for a range of HVAC applications. This extremely lightweight, flexible, air extraction ducting comes with fire resistant it suitable for a range of HVAC applications.Each HVAC flexible duct is insulated with glass wool material. This product is beneficial to consumers because of its affordable price point. It is definitely a more cost- effective HVAC ducting option than other competing hoses. It will also look good in and setting that it is placed in thanks to the shiny silver insulation material on the outside of the hose. The keys advantage of this HVAC flexible duct is how easy it’s to handle this is a portable air conditioner hose that can be easily compressed for transportation purposes. This is a great HVAC ducting hose to have if your applications or constantly on the move. This ducts for air conditioning or meant for residential and industrial air movement applications. It’s being used in various applications like A/C ventilation cold air suppliers, utilities blowers and more.

FABRIC DUCT

The products are usually acting as both supply air ducting as well as air distribution into the occupied zone. In principle of fabric duct is a round, semi-round or quarter round duct made of a light-weight cloth type material instead of e.g. galvanized steel, stainless steel or aluminum, designed for delivery and distribution of cooled or heated air.

Also you may choose from an almost unlimited range of system layouts, colors, materials, Fabric ducts are very well suited for efficient, uniform, and draught-free distribution of fresh air without "dead zones". Stale and stagnant air may cause fatigue and headache. Fabric ducts create an effective air change and a good indoor climate in residential or commercial area and other types of rooms where many people are assembled. Advantage of the fabric duct is high fire resistance, antibacterial, easy for maintenance, and good looks good. It’s easy for transportation and install.