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 airflow, with adjustable swirl unit and added horizontal air routing
Variants with adjustable swirl units can be manually set to vertical or horizontal air routing
Surface floor grille and clamping flange in 2 factory-available colours - for builders and architects with special demands on architecture and design
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
Nominal sizes
Variants
Setting of the airflow direction
Installation
Dirt trap
Plenum box
Construction
Parts and characteristics
Diffuser core
Clamping flange with clamp spring attachment
Attachments
Accessories
Plenum box -A:
Material and surfaces
Technical data
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 the air routings are possible.
Vertical flow 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 swell-like flow spreads over the entire floor surface. A lift current forms at heat sources such as people and equipment, so that the air is primarily exchanged in these areas.
This type of hybrid ventilation or mixed-source ventilation is designed exclusively for cooling operation. It is particularly suitable for rooms with a clear division between circulation and occupied areas. These include, for instance, cinema or theatre halls and waiting areas. The maximum supply air temperature difference should not exceed -6 K. The exhaust air should be dissipated in the upper part of the room, above the occupied zone.
Horizontal swirling airflow
An adjustable swirl unit set for vertical flow causes a swirling vertical supply air flow into the room. In doing so, the supply air induces room air near the floor surface and quickly reduces the air velocity as well as the temperature difference between supply air and room air. This type of mixed ventilation is particularly suitable for areas that are permanently intended for people to remain. This includes, for example, office spaces or assembly and
meeting rooms.
Vertical swirling airflow
An adjustable swirl blade set for vertical flow causes a swirling vertical supply air flow into the room. Through this process, the supply air induces room air. There is a rapid reduction in flow velocities and a quick reduction of the temperature difference between supply air and room air. This type of mixed ventilation results in proficient room 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 sizes | 150, 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 | > 5 kN |
The quick lay-out provides a proficient overview of the possible volume flow rates, the corresponding sound power levels and pressure differences with horizontal air flow. The minimum volume flow rates apply to a supply air temperature difference of -6 K. The maximum volume flows apply to a sound power level of approx. 50 dB(A) Exact values for all parameters can be determined with our Easy Product Finder design program.
Air diffuser only
NS | qv | Δpt | LwA | |
---|---|---|---|---|
l/s | m³/h | Pa | dB(A) | |
150 | 1 | 4 | 0 | < 15 |
11 | 39 | 13 | 20 | |
21 | 77 | 49 | 39 | |
32 | 115 | 109 | 50 | |
200 | 1 | 4 | 0 | < 15 |
20 | 72 | 11 | 17 | |
40 | 143 | 43 | 38 | |
59 | 213 | 95 | 50 |
With plenum box
NS | qv | Δpt | LwA | |
---|---|---|---|---|
l/s | m³/h | Pa | dB(A) | |
150 | 1 | 4 | 0 | < 15 |
13 | 47 | 15 | 24 | |
26 | 93 | 57 | 40 | |
39 | 140 | 127 | 50 | |
200 | 1 | 4 | 0 | < 15 |
19 | 67 | 14 | 19 | |
37 | 133 | 54 | 38 | |
55 | 198 | 119 | 50 |
With dirt trap
NS | qv | H4 = maximum | H4 = 45 | H4 = 35 | ||||
---|---|---|---|---|---|---|---|---|
Δpt | LwA | Δpt | LwA | Δpt | LwA | |||
l/s | m³/h | Pa | dB(A) | Pa | dB(A) | Pa | dB(A) | |
150 | 1 | 4 | 0 | < 15 | 0 | < 15 | 0 | < 15 |
11 | 39 | 12 | 20 | 14 | 18 | 16 | 21 | |
22 | 78 | 48 | 39 | 54 | 39 | 61 | 41 | |
32 | 116 | 108 | 50 | 120 | 51 | 136 | 52 |
NS | qv | H4 = maximum | H4 = 50 | H4 = 40 | ||||
---|---|---|---|---|---|---|---|---|
Δpt | LwA | Δpt | LwA | Δpt | LwA | |||
l/s | m³/h | Pa | dB(A) | Pa | dB(A) | Pa | dB(A) | |
200 | 1 | 4 | 0 | < 15 | 0 | < 15 | 0 | <15 |
20 | 73 | 11 | 18 | 13 | 19 | 14 | 19 | |
40 | 143 | 42 | 38 | 49 | 39 | 56 | 40 | |
59 | 214 | 93 | 50 | 110 | 50 | 126 | 52 |
With plenum box and dirt trap
NS | qv | H4 = maximum | H4 = 45 | H4 = 35 | ||||
---|---|---|---|---|---|---|---|---|
Δpt | LwA | Δpt | LwA | Δpt | LwA | |||
l/s | m³/h | Pa | dB(A) | Pa | dB(A) | Pa | dB(A) | |
150 | 1 | 4 | 0 | < 15 | 0 | < 15 | 0 | < 15 |
12 | 44 | 14 | 22 | 16 | 19 | 18 | 22 | |
24 | 86 | 54 | 40 | 60 | 40 | 69 | 42 | |
36 | 129 | 119 | 50 | 135 | 53 | 155 | 54 |
NS | qv | H4 = maximum | H4 = 50 | H4 = 40 | ||||
---|---|---|---|---|---|---|---|---|
Δpt | LwA | Δpt | LwA | Δpt | LwA | |||
l/s | m³/h | Pa | dB(A) | Pa | dB(A) | Pa | dB(A) | |
200 | 1 | 4 | 0 | < 15 | 0 | < 15 | 0 | < 15 |
18 | 64 | 13 | 19 | 14 | 19 | 15 | 19 | |
35 | 125 | 49 | 38 | 54 | 39 | 60 | 39 | |
52 | 187 | 108 | 50 | 121 | 50 | 133 | 51 |
Specification text
General information:
Floor diffusers as supply air diffusers for installation in raised floors of all types. Supply air provision either directly via the raised floor if it is constructed as a pressurised floor, or via a plenum box connected to the on-site air duct system.
Grille core with twist-shaped connecting bars made of plastic polyamide PA 6 UL94, V-0, flame-retardant.
Installation:
Airflow direction:
Dirt trap:
Plenum box:
Equivalence criteria
2 nominal sizes [mm]
2 versions
Volume flow rate range
Supply air to room air temperature difference
Crush resistance
FBK | – | 2 | – | V | – | KF | – | SM | – | A | / | 150 |
| | | | | | | | | | | | | | ||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 |
Order example: FBK-2-V-KF-SM-A/150
Type | FBK |
Surface of diffuser core and trim ring | Similar to RAL 9005 (jet black) |
Swirl unit (to set the airflow direction) | Vertical, adjustable swirl unit |
Installation | Trim ring with spring clips |
Dirt trap | Flow rate adjustment from the underside |
Plenum box | With plenum box |
Nominal size [mm] | 150 |
The schematic diagrams are provided to illustrate installation details.
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Contact
We are here for you
Please specify your message and type of request.
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051