A ventilation adapter from round to rectangular is a product that allows you to connect two air ducts of different sections, which allows you to increase or decrease air flows in ventilation systems. Often, in the process of planning the construction of ventilation systems, one has to deal with severe space savings when it is necessary to use only rectangular air ducts. At the same time, if part of the system was formed by round air ducts, you will need to buy a transition from rectangular to round.
You can purchase a straight to round ventilation transition at an affordable price by contacting the Vent Center online store. Our transitions are made of galvanized steel, which has the following advantages:
- Withstands mechanical pressure without deforming during use;
- Not susceptible to corrosion processes that can develop due to contact with liquid;
- Tolerates temperature changes well;
- It is distinguished by reliability and durability;
- Transitions made of steel are sold at the lowest price.
When is such a connection needed?
Air duct systems are constructed from metal pipes of two types of sections: rectangular and round, or flat oval. Situations arise when it is necessary to switch from one type to another in the same air route. As a rule, this is due to either technical necessity or design decisions.
In order to smoothly and reliably connect different types, special structures are made: transitions from one section shape to another shape.
They are made from galvanized or stainless steel with a thickness of 0.5 to 2 mm, using the rolling method. The photo below shows an adapter from round to square. One part of the box has a rectangular hole, the other has a round hole.
In accordance with the type of execution, the arrangement of sections can be either symmetrical or asymmetrical. The diagram below shows 6 ways to place round holes.
Specifications
According to their shape, such transitions are divided into square and rectangular. The transition from a square to a round cross-section has a rectangular part that is more voluminous, and therefore is not suitable for passage in low rooms. Three types of metal are usually used as materials for such transitions:
- • Stainless steel. Such air ducts are not afraid of corrosion and damp rooms; even after a year they will shine like new.
- • Cink Steel. This steel is slightly less durable than stainless steel, but is also almost 25% cheaper. The choice is yours whether to use stainless or galvanized steel. The round air duct made of galvanized steel does an excellent job of removing humid air and air contaminated with debris.
- • Aluminum. The light weight of this metal allows structures made from it to be placed on weak mounts at high altitudes.
Advantages and disadvantages of such a connection
Round ducts have many advantages over square or rectangular ducts. They are more popular. However, corner pipes have the ability to fit tightly to the surface, which sometimes allows you to free up some volume of the room. For example, flat channels will organically fit into the corner of suspended ceilings, which will visually increase their height.
It is important to note that transitions can be manufactured with different diameter ratios of round and rectangular shapes.
How to connect pipes of different sections to each other
In ventilation systems, quite often the air exhaust channel is built from pipes of various shapes through which air or gas forced by fans moves. Round pipes have less resistance, but they take up more space, and therefore they are often connected to rectangular products.
The main requirement for air ducts is gas tightness. It will not be possible to directly connect two pipes with different cross-sections without loss of pressure: when moving through pipes of different configurations, air or gas will inevitably reduce the speed of movement. To avoid this, it is necessary to use special adapters that will create a smooth transition and will not interfere with the speed of movement of air masses.
Connection methods
To install transitions with other segments, various methods are used:
- on the round side – nipple;
- with rectangular - flanged, rack, rail mounted, welded.
The nipple is a pipe on which the so-called zig is extruded in the middle on the machine at the preparation stage. A ready-made adapter is already available with such a coupling.
Nipple for joining round sections:
The flanges on the rectangular side are connected to the mating part using bolts and nuts. Often flanges are made from tire rails and corners.
If flanges are not used, they resort to the rack and pinion method.
The photo shows the rack connection:
Prices for rectangular products made of galvanized steel (rub/m2)
The transition from a rectangular section to a round one is a shaped product. To calculate the cost, use the information from the “Shaped Products” table.
| Metal thickness, mm | Rectangular | ||||||||||
| Straight sections | Non-standard straight sections | Shaped products | Non-standard shaped products | ||||||||
| 0,5 | from 759.6 | from 1021.2 | from 1300.2 | from 1914 | |||||||
| 0,7 | from 897.6 | from 1164 | from 1445.4 | from 2059.2 | |||||||
| 0,8 | from 997.2 | from 1258.8 | from 1491.6 | from 2244 | |||||||
| 0,9 | from 1108.8 | from 1306.8 | from 1604.4 | from 2376 | |||||||
| 1 | from 1188 | from 1353 | from 1716 | from 2706 | |||||||
Which way is better
Flange and rack methods are more labor-intensive. In addition, rack joints are not always airtight; air leaks through them, and condensation freezes on frosty days.
The use of a tire and an angle is gaining popularity among professionals. The production of these parts does not require expensive equipment; the connections are reliable and durable.
The advantages of the nipple method are simplicity and high speed of installation. But for better sealing of joints using this method, sealants are needed.
You can get acquainted with various methods of connecting air ducts in this video:
Circle-to-rectangle transition data table
100*1503000,120,54125100*1503000,130,61160100*1503000,150,61160150*1503000,170,75160150*2503000,20,88200150*1503000,180,85200150*2003000,20,91200150*2503000,210,98200250*2503000,241,11250150*1503000,210,98250150*2003000,241,03250150*2503000,251,09250250*2503000,271,22250250*3003000,281,29315150*2503000,291,25315250*4003000,341,57315250*5004000,52,25355250*2503000,321,48355250*3003000,331,53355250*4003000,361,65355250*5003000,391,81355400*4003000,411,89400250*3003000,351,7400250*4003000,381,76400250*5003000,411,89400400*4003000,431,97400400*5003000,462,14450250*4004000,542,48450250*5003000,442450400*4003000,452,07450400*5003000,482,23450400*6004000,693,12500250*5005000,774,4500400*4003000,482,78500400*5003000,512,92500400*6003000,543,17500400*8006001,196,82500500*5003000,543,17500500*6003000,573,42500500*8006001,257,24630400*5003000,573,35630400*6003000,63,49630400*8005001,16,26630500*5003000,633,49630500*6003000,643,67630500*8003000,694,19630500*10007001,7410630600*6003000,663,89630600*8003000,724,51710400*6006001,277,25710400*8006001,397,89710500*5004000,854,92710500*6004000,895,12710500*8004000,975,59710500*10004001,056,24710600*6003000,74,07710600*8003000,754,57710600*10003000,815,3710800*8003000,815,3For advice and for all questions regarding ordering ventilation equipment and air ducts (information about the cost of air ducts), please call +7 or send a request by e-mail
Step-by-step technique for connecting pipes with your own hands
Any joining of ventilation parts has its own sequence of actions.
Determine the method of connecting the transition with the air duct based on the type of device purchased.
Prepare and assemble the parts of the connecting assembly of the rectangular part.
The round part of the box is inserted with the necessary sealing into the previous air duct.
Then the next segment, grille or diffuser is attached to the adapter rectangle, depending on the project.
Required tools and materials
The set of tools includes a screwdriver, roofing shears, a mandrel, a riveter and other tools, depending on the type of operation.
The materials needed include a transition, air ducts, and other possible parts of the network: damper, diffuser, plug, deflector, devices for forced ventilation, fasteners, etc.
Work progress
First, the total length of the ventilation system, including fittings, is determined. If the length of the entire air duct is short, it is assembled locally. Large structures are assembled in parts.
It is necessary to provide in advance and prepare, if required, a tie-in and install a check valve.
Often, a roof choke is mounted to a shaped element, which is a transition, in which case the shape of its section and the type of connecting part must correspond to the parameters of the adapter.
We should not forget about the fire damper, which must be in the ventilation system in accordance with fire safety regulations.
If the system operates a powerful fan, a flexible fan insert must be provided, which is inserted with one side into the fan nozzle and the other into the duct.
To complete the installation of the entire system, install a deflector on the ventilation pipe facing the roof of the house.
Prices for rectangular stainless steel products (rub/m2)
| Metal thickness, mm | Rectangular | |||
| Straight sections | Shaped products | |||
| Galvanized rail rail | Stainless steel rail | Galvanized rail rail | Stainless steel rail | |
| 0,5 | from 2100 | from 3000 | from 3720 | from 6360 |
Installation features
When installing ventilation ducts, they are guided by regulatory documents that specify the basic requirements for the process. Manufacturers attach their recommendations and restrictions to the products.
There can be two design options for the air supply network.
The first represents the combination of all pipes into a single system with a common outlet channel. The second provides an individual air duct for each room.
The size of the cut-in must be less than or equal to the diameter of the duct into which it will cut.
Ordering adapters for the ventilation system
To place an order for high-quality products and buy them, you need to familiarize yourself with their assortment. The online store presents Russian-made products. A reliable manufacturer produces ventilation components that are ideal for use in our country with its severe frosts and other climatic conditions.
All products are supplied with a full package of accompanying documentation. There is no doubt about the quality of the components. Delivery from the online store is carried out within a predetermined time frame. The product catalog indicates whether the items you are interested in are in stock. This information is current. Experienced installers of ventilation systems give preference to high-quality, domestically produced products.
Expert advice
When assembling the ventilation system, it is recommended to make as few connections as possible.
When installing the system, it is necessary to provide free access to the unit containing the ventilation filters.
To improve the tightness of the joints, you can use a polymer lining or soft rubber.
The air duct should be fastened directly to the wall using special brackets and studs. The recommended distance between them is 100 cm for the horizontal segment and 1.8 m for the vertical segment.
Our advantages
- We offer products of the highest quality that you can purchase at an affordable price;
- We have a wide selection of products for ventilation systems, differing in material, size, design and performance characteristics;
- Delivery of the paid order is carried out in a matter of days;
- Regular customers become participants in the bonus system and receive discounts on goods;
- We carry out orders for the production of some parts according to individual parameters;
- Qualified personnel advise on the characteristics of the product and can help in calculating the required quantity.
Contact our company and you can buy high-quality ventilation transitions, as well as other parts for ventilation systems, at a minimal price.
