Construction And Types Of Grille And Diffusers

A special device used in supplying and extracting air vertically without any kind of deflection is called a grille.

A device used to direct the air at different angles by profiled blades when the air is leaving the unit and going into the space is known as a diffuser.

Important components:

These two are the integral part of any HVAC for the distribution of air and hence cause the building to be more comfortable for the occupants. They are made with following materials

Aluminum

Mild steel

Stainless steel

Plastic

Finishing:

The finishing of these two can be in white, any other color, anodized aluminum, stainless steel or it can be chrome in color.

Location:

These devices are usually mounted in the floors, walls, doors ceiling and in ducts. Some of these devices are specially designed for horizontal and vertical mounting but floor devices are robust enough to withstand the pressure exerted on them by foot traffic.

Types:

Grille and diffusers are available in various types in the market. These types are:

Grilles:

1. Egg grate

2. Bar type

3. Transfer type

Diffusers:

1. Louvre bladed

2. Straight bladed

3. Linear slot

Egg grate devices:

These devices are considered to be the most cheapest and simple equipment of their category. The plenum box is visible above the equipment and can be seen from the room below. If the purpose is to remove air by extracting ventilation system then there is no need of the device having profiled blades to direct the air as egg grate device can be used here.

Bar device:

This device’s blades are shaped as a bar as opposed to a narrow blade. The bar is mostly of T shape which reduces the see through factor.

Some linear bar devices come with angled or adjustable blades which reduce the see through visibility.

Transfer device:

These devices are commonly used in the walls and doors for ventilation and also stop the fire and smoke from spreading if in any case these occur. Sometimes transfer devices come with intumescent fire damper to act as insulation if fire erupts.

Louvre bladed device:

They supply air at the ceiling level and can be round and square in shape. Curved blades are capable of deflecting air in more than two directions which depends on the place at where it is located.

Straight bladed device:

Straight bladed devices are normally cheaper than Louvre Bladed devices and some of their types come with adjustable blades.

Linear slot device:

Linear slot devices are used not only for distributing but also used for aesthetic purposes in the buildings. They can be used for both the purposes of supplying or returning air. Blanking plates create dummy slots to create a continuous linear effect.

Without grille and diffusers air conditioning system cannot be used or it is incomplete. Both of these work by collaborating with each other to enhance their performance of providing comfort to your house or the building.