The exhaust diffuser is a device that facilitates the removal of used air from the room. This device may have other names, such as "air distributor", "nozzle", "membrane".
Appointment
The diffuser and ventilation grill, in fact, are one and the same device, but with a different design.
The main purpose of this device is to create uniform air exchange as a result of the distribution of air flow.
The device can be used in various rooms: both residential and non-residential.
It must be installed when there is a need to create comfortable conditions in an enclosed space that has ventilation, if you need to change the air supply pattern, reduce the heat load, remove dust, which is a terrible allergen in recent years, you must maintain the speed of air movement and maintain uneven temperature.
The volume of incoming and outgoing air using an exhaust diffuser can be adjusted.
Classification
Diffusers for ventilation are classified as follows:
- by appointment - supply, exhaust and overflow;
- on effects on air masses - displacing and mixing;
- on installation - for external and internal installation.
In turn, the latter are divided into wall, floor and ceiling.
According to the material, the diffusers can be made of plastic or metal. Metal devices are coated with paint on top; they have a higher cost compared to their plastic counterparts.
The main differences between the intended products are the angle of inclination of the blades. Most products are operated in supply ventilation systems, less often in exhaust systems .
According to the design of the holes, the following diffusers are distinguished:
- Slotted - a rectangular frame with narrow and long holes. The lamellas can be directed directly, perpendicularly to the frame, in this case the air will come from the diffuser with a direct stream, or at an angle - the air will come in the direction with respect to which the lamellas are open. Some models have lamella adjustment, which can be done for all of them at once or for each individually.
- Nozzle - air is supplied by a continuous stream, as a rule, it is operated in rooms of a large area with high ceilings. For some models, the direction and inclination of the nozzle are adjustable.
- The dish-shaped represents a round frame with the circle fixed near it. The gap between the circle and the frame provides a stream of air distributed along the ceiling.
- Vortex - has blades, like a fan, which allows you to effectively mix air.
- A fan is a complex of diffusers combined into one.
Thus, many types of diffusers are distinguished. Considered exhaust devices, as a rule, belong to the plate type and are intended for mounting in the kitchen or in the bathroom.
The shape of the body emit a diffuser round, square and rectangular.
Slot views
The slot diffuser is a device that is mainly used for supplying fresh, but can also be used to remove exhaust air from rooms. It is set by aesthetes who want to get good air quality.
This device can be a ceiling diffuser, or mounted on a wall. The ceiling height is limited to 4 m in order to ensure optimal air distribution. In this case, the lower mounting limit of these devices is limited to 2.6 m.
The case of such a diffuser, as a rule, is aluminum, has 1-6 slots. A cylindrical roller is located inside, with the help of which the air flow is directed. Many models have a static pressure chamber for the purpose of managing the air flow.
The height of the gap can be 8-25 mm, length - from 2 cm to 3 m.
Ceiling Air Distributors
Ceiling diffusers are also supply and exhaust. As already noted, slotted views can belong to the ceiling. Such devices are also characterized by the presence of a static pressure chamber. As exhaust hoods, circular diffusers are generally used, having a size of 10-60 cm. They can be installed in a suspended, suspended ceiling or crashed into a drywall panel. In case of installation in a suspended ceiling, additional rings must be used.
Low speed diffusers
These devices contribute to the displacement of exhaust air from the room. In this case, clean air is supplied to the serviced space, the air flow rate is low, and the temperature differences between the room and the inflow air are minimal. Thus, these devices can be attributed to the supply and exhaust.
These devices can be wall, built-in and floor. The last two types of diffusers are installed in steps and flights of stairs. Such devices can be used in museums, sports facilities, concert halls, cinemas, shops.
These diffusers are made of metal, which is coated with powder paint. In addition, adonated aluminum may be used. The inlet pipe is located in the housing; there are inner and outer shells. Shells may also be present by which the air flow directions are regulated.
Installation options
Installation of the exhaust diffuser can be carried out in the corrugation (metal sleeve), a wall hole (the so-called channelless ventilation), or in the duct (hard sleeve).
Let's consider these options in more detail.
- Installation in corrugation. The end of the corrugation is removed from the channel, to which a diffuser for ventilation is attached. The diffuser with the corrugation carefully moves back into the channel, while you need to feel whether the product is in free movement or has reached a stop. If the latter is reached, the product must be pressed gently enough to make a click. This suggests that the latches fell into place.
- Installation in channelless ventilation. A hole is made in the wall, which should be the size of the exhaust diffuser plus 5-10 mm for stock. Next, we take a pipe that coincides in size with the size of the exhaust diffuser. If the pipe is larger than the wall thickness, it must be cut to these sizes. The cut-off part is inserted into the hole prepared in the wall and foamed. It turns out a socket into which a diffuser is inserted.
- Hard channel mounting. Here it is necessary to choose an exhaust diffuser that matches the size of the channel. Then insert the device into the box. Insertion occurs until a distinctive click is heard.
Installation Recommendations
- The fastener should be selected based on the shape of the diffuser, as well as the design of the element where the installation will be carried out.
- This element is mounted at the construction stage according to the project plan.
- On the surface of the planned installation, make a mark on the mount.
- When installing in a suspended ceiling or plunging into drywall, we note the place of attachment of the frame and ceiling.
- In order to determine the space that the structure will occupy, we mark on the wall.
- Grinder make an abasement in the wall with a gap of about 5 mm.
- We insert the diffuser body and mark the attachment points.
- We drill the required holes with a puncher or drill.
- Joints are treated with sealant and fastened.
- We attach the nozzle with bolts and screws.
- We remove the front panel to adjust the parameters of the air distribution.
- We connect a micronanometer and a measuring nipple.
On this installation is completed. The device during operation requires personal care; it must be washed with warm water and detergents.
Finally
Thus, exhaust and supply diffusers are distinguished. The latter are more common. Exhaust devices are mainly used to neutralize unpleasant odors. Supply and exhaust diffusers are also widely used mainly in non-residential premises. Installation of diffusers is not difficult and can be done independently.