FBA_img_15psd.png
FBA_img_14psd.png

Adjustable dirt trap

FBA_img_18psd.png

Trim ring with spring clip fixing

FBA_img_05psd.png

With swirl element to adjust the air flow

FBA_img_15psd.png
FBA_img_14psd.png
FBA_img_18psd.png
FBA_img_05psd.png

FBA  

Round aluminium air diffusers for installation in floors

The different attachments allow a wide range of applications with different air flows, installation conditions and several options for volume flow balancing.

  • Nominal sizes: 150, 200 mm
  • Volume flow range 1 - 59 l/s or 4 - 213 m³/h
  • Annular diffuser contour with different surface structures
  • For constant and variable volume flows
  • For all types of raised floors
  • Horizontal or vertical air flow
  • Reduction element adjustable on the front or rear side
  • Can be installed with and without trim ring
  • The trim ring allows quick and easy installation and removal of the grille inserts for cleaning purposes
  • High mechanical strength/breaking resistance > 17 kN
  • Ideal for comfort zones

Optional equipment and accessories

  • Swirl unit adjustable at the back for manual adjustment between vertical and horizontal air routing
  • Trim ring with spring clip fixing to cover the installation opening
  • Dirt trap can also be used as a reduction element
  • Plenum box

General information

Application
  • Floor diffusers as supply air diffusers for comfort areas
  • Installation in raised floors without plenum box if it is constructed as a pressurised floor
  • Installation in raised floors with plenum box to allow individual ventilation in rooms or zones
  • Vertical supply air flow, with adjustable swirl unit also horizontal air flow
  • Variants with adjustable swirl units can be manually set to vertical or horizontal air routing
  • Attractive design element with various types of surfaces, for building owners and architects with demanding aesthetic requirements
  • Comfortable and energy-efficient airflow through supporting convection currents in the occupied zone
  • Thermal loads are effectively dissipated
  • For constant and variable volume flows
  • For supply air temperature differences of -12 – +20 K

Special characteristics
  • Simple and quick assembly and covering of the installation opening when used with trim ring and spring clip fixing
  • Installation in hard flooring requires a spacing ring. The spacing ring is included in the delivery if no trim ring has been selected
  • High crush resistance > 17 kN
  • The grille insert is torsion-proof and centred in combination with trim ring
  • With or without swirl unit to allow for various air patterns
  • A dirt trap reduces contamination of the floor and facilitates volume flow rate balancing. It can be adjusted from the diffuser front and back surface

Nominal sizes
150, 200

Variants
Setting the air flow direction
  • -*: no entry: vertical air flow, inalterable
  • -V: preset vertical swirling airflow, the swirl vane is manually adjustable
  • -H: preset horizontal swirling airflow, the swirl vane is manually adjustable
Installation
  • -*-: Floor diffuser with spacing ring
  • -KF: Floor diffuser with trim ring and spring clip fixing
Dirt trap
  • -*: no entry: without dirt trap
  • -SM: with adjustable dirt trap Dirt trap adjustable on the back, the dirt trap can also serve as a reduction element for volume flow rate balancing
  • -SV: with adjustable dirt trap Dirt trap adjustable from the diffuser face front, the dirt trap can also serve as a reduction element for volume flow rate balancing
Plenum box
  • -*: no entry: without plenum box
  • -A: with plenum box for connection to the on-site air duct system

Construction
Surface floor diffuser (floor grille and trim ring)
  • -1: Deburred diffuser core
  • -3: Deburred diffuser core, painted black, exposed surface overtightened
  • -4: Deburred diffuser core, exposed surface overtigthened

Parts and characteristics
Grille insert Floor diffuser
  • Ring spacing: 6 mm
  • Height-adjustable dirt trap which serves as a reduction element for volume flow rate balancing
  • Adjustable swirl unit for vertical or horizontal swirling air flow or air routing
Trim ring with spring clip fixing
  • Rotation lock and centring grille insert
  • Covers the installation opening
  • Spring clip fixing enables different magnitude of the raised floor and the compensation of large cut-out tolerances when creating the installation openings. For the tightest possible fit of the trim ring, we recommend the minimum installation dimension
  • Balancing with soft flooring, e.g. carpetWorks well with soft flooring, e.g. carpet

Attachments
  • Spacing ring to hold the grille insert for variants without trim ring
  • Trim ring with spring clip fixing to accommodate the grille insert and to attach the installation opening
  • Adjustable swirl unit for vertical or horizontal swirling air flow
  • Fixed swirl unit for vertical air flow (only for nominal size 200)
  • Height-adjustable dirt trap which also serves as a reduction element for volume flow rate balancing

Accessories
Plenum box -A:
  • For direct connection to the on-site air duct system
  • With incorporated air distribution element for a steady flow to the floor diffuser
  • Plenum box suitable for all nominal sizes

Material
  • Grille insert and trim ring made of die-cast aluminium
  • Spring clips made of stainless steel
  • Adjustable swirl unit and dirt trap made of ABS plastic, UL94-V-0
  • Spacing ring made of plastic ABS UL 94-V-0
  • Dirt trap adjustment device and connective marterial made of galvanised steel
  • Plenum box made of galvanised sheet steel

Technical data
  • Nominal sizes: 150, 200 mm
  • Volume flow rate range: 1 – 59 l/s or 4 – 213 m³/h
  • Supply air temperature difference: -12 - +20 K
  • Crush resistance > 17 kN

Техническа информация

  • FUNCTION
  • TECHNICAL DATA
  • SPECIFICATION TEXT
  • ORDER CODE
Schematic illustration Schematic illustration
A FBA-...-KF
B FBA
C FBA-...-KF-A
1 Diffuser face
2 Housing with clamping flange and clamping springs
3 Spacing ring
Optional
4 Dirt trap
5 Plenum box
6 Base plate (on-site)

Floor diffusers allow supply air in mechanical ventilation and air conditioning systems to flow into the room from below or from the floor. For adaptation to different local conditions, 3 different variants of air distribution are possible.

Vertical airflow without adjustment option

Without adjustable swirl unit, the supply air flows vertically into the room at a moderate speed. Since cold air is heavier than warm air, the direction of flow reverses and the supply air flows back towards the floor. A low-turbulence or displacement flow spreads over the entire floor surface. A buoyancy flow forms at heat sources such as people and appliances, so that the air is primarily exchanged in these areas. This type of hybrid ventilation or inducing displacement flow ventilation is designed exclusively for cooling operation. It is particularly suitable for rooms with a clear division between circulation and occupied zone. These include, for instance, cinema or theatre halls and waiting areas. The maximum supply air temperature difference should not exceed -6 K. The extract air should be dissipated in the upper part of the room, above the occupied zone.

Horizontal swirling airflow

An adjustable swirl unit set for horizontal flow causes a swirl pattern of horizontal supply air flow into the room. In doing so, the supply air induces indoor air near the floor surface and quickly reduces the air velocity as well as the temperature difference between supply air and indoor air. This type of mixed flow ventilation is particularly suitable for areas which are intended for people to remain in for longer periods. This includes, for instance, office spaces or meeting and conference rooms.

Vertical swirling airflow

An adjustable swirl unit set for vertical flow causes a swirl pattern of vertical supply air flow into the room. Through this process, the supply air induces indoor air. There is a rapid reduction in flow velocities and a quick reduction of the temperature difference between supply air and indoor air. This type of mixed flow ventilation results in proficient indoor ventilation. It is particularly suitable for areas in which people do not remain for longer periods of time. This includes corridors or similar circulation areas.

Nominal sizes150, 200 mm
Volume flow rate range

1 – 59 l/s or 4 – 213 m³/h

Supply air to room air temperature difference

-12 to +20 K

Crush resistance> 17 kN
,


This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design program.

Specification text

General information:

Floor diffusers as supply air diffusers for installation in raised floors of all types. Supply air supply either directly via the raised floor if it is construceted as a pressurised floor, or via a plenum box connected to the on-site air duct system.
Diffuser core with curved mullions made of diecast aluminium.

Installation:

1. With stepped spacing ring made of ABS UL94-V-0 plastic for precise installation in the raised floor

2. With trim ring and spring clip fixing for easy ASSEMBLAGE with various base plate magnitude from 10 mm. Made of die-cast aluminium, the component centres the grille insert and simultaneously secures it from twisting
Air flow direction:

1. Without adjustable swirl unit for vertical air flow

2. With adjustable swirl unit (ABS plastic, UL94-V-0) for vertical or horizontal air flow (factory settings can be changed) If required, the swirl vane can be adjusted manually

Dirt trap:

1. Without dirt trap, which can be used as a reduction element for volume flow balancing
2. With dirt trap (ABS plastic, UL94-V-0) that also serves as a reduction element for volume flow rate balancing

Plenum box:

1. Without plenum box for installation in pressurised floor

2. With plenum box made of galvanised sheet steel; plenum box with Ø 123 mm spigot for connection to the air duct system With incorporated air distribution element for a steady flow to the floor diffuser

Equivalence criteria

2 nominal sizes [mm]

  • 150
  • 200
3 surface textures
  • Floor diffuser deburred
  • Floor diffuser deburred, black lacquered, visible side overtightened
  • Floor diffuser deburred, visible side overtightened
Volume flow rate range
  • 1 – 59 l/s or 4 – 213 m³/h
Supply air temperature difference

  • -12 to +20 K
Crush resistance

  • > 17 kN

FBA3VKFSMA/150
|||||||
1234567
1 Type
FBA
Floor diffuser

2 Surface floor diffuser (grille core and trim ring)
1
deburred
3 deburred, painted black, exposed surface skimmed
4 deburred, exposed surface skimmed

3 Airflow direction
No entry: vertical
V vertical, adjustable swirl unit
H horizontal, adjustable swirl unit

4 Installation
No entry: spacing ring for stepped holes
KF Trim ring and spring clips

5 Dirt trap
No entry: without dirt trap
SM flow rate adjustment on the rear side
SV flow rate adjustment on the front side

6 Plenum box
No entry: without plenum box
A with plenum box

7 Nominal size [mm]
150, 200 


Order example: FBA-3-V-KF-SM-A/150

TypeFBA
Surface of diffuser core and trim ringDeburred, painted black, exposed surface skimmed
Airflow directionVertical, adjustable swirl unit
InstallationTrim ring with spring clips
Dirt trapFlow rate adjustment from the underside
Plenum boxWith plenum box
Nominal size [mm]150

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Тел.: +359 2 981 25 74 | Факс: +359 2 986 20 65