TDF-SilentAIR

Circular diffuser faces with circular plenum box

Square diffuser face with square plenum box

Twist-shaped, horizontal Air duct

Round diffuser face

TDF-SILENTAIR

WITH VERY LOW SOUND POWER LEVEL FOR COMFORT ZONES, WITH FIXED AIR CONTROL BLADES

Circular and square ceiling swirl diffusers

Nominal sizes 300, 400, 500, 600, 625
Volume flow rate range 10 – 265 l/s or 36 – 954 m³/h
Diffuser face made of galvanised sheet steel, powder-coated
For supply and extract air
For variable and constant volume flows
For all types of ceiling systems, and with an extended border also suitable for freely suspended installation
High induction results in a rapid reduction of the temperature difference and airflow velocity
Ideal for comfort zones

Optional equipment and accessories

Exposed diffuser face available in RAL Classic colours
Horizontal or vertical duct connection
Plenum box with cord-operated damper blade and pressure tap

Initialize order code

General information

Application

Ceiling swirl diffusers are used as supply air or extract air diffusers for comfort zones

Attractive design element for building owners and architects with demanding aesthetic requirements
Horizontal swirling supply air discharge for mixed flow ventilation
The efficient swirl creates high induction levels, thereby rapidly reducing the temperature difference and airflow velocity (supply air variant)
For variable and constant volume flows
For supply air to room air temperature differences from -12 – +10 K
For room heights up to 4 m (lower edge of suspended ceiling)
For all types of ceiling systems
With an extended border also suitable for freely suspended installation (supply air variant)

Special features

High induction results in a rapid reduction of the supply air to room air temperature difference and airflow velocity

For all types of ceiling systems, and with an extended border also suitable for freely suspended installation

Horizontal or vertical duct connection

Very high room air change rate possible thanks to row arrangement with a minimum pitch distance of 0.9 m

Nominal sizes

300, 400, 500, 600, 625

Variants

TDF-SA-Q: Square diffuser face
TDF-SA-R: Circular diffuser face
TDF-SA-*-Z: Supply air
TDF-SA-*-A: Extract air

Connection

Q-*-H: Square plenum box with horizontal duct connection
R-*-H: Circular plenum box with horizontal duct connection
V: Vertical duct connection

Accessories

Lip seal

For circular plenum boxes with horizontal connection spigot, the lip seal is only available in combination with the flow adjustment damper. Otherwise, it can always be selected optionally.

Attachments

M: Damper element for volume flow rate balancing

MN: Pressure tap and cord-operated damper unit for volume flow rate balancing with the diffuser face in place (only possible with square plenum box)

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180

Spigot with groove for lip seal (only applies to galvanised spigots and lip seal accessories)

Materials and surfaces

Grille face made of galvanised sheet steel

Q; R: Plenum box made of galvanised sheet steel including galvanised sheet steel cross bar to support the diffuser face

Plenum boxes with vertical connection and square plenum boxes with horizontal connection: for supply air always with galvanised perforated plate for air distribution

Circular plenum boxes with horizontal spigot: Equipped as a plenum box for supply air with an equalising element made of polyester

Square plenum boxes and plenum boxes with vertical spigot: Spigot made of galvanised sheet steel

Circular plenum boxes with horizontal spigot: Spigot made of black ABS, according to UL94, V0 flame retardant

Lip seal made of Evoprene

Diffuser face powder-coated, RAL 9010, pure white

P1: Powder-coated, RAL Classic colour

Standards and guidelines

Sound power level of the air-regenerated noise measured according to EN ISO 5135

Maintenance

Low maintenance as construction and materials are not subject to wear

Inspection and cleaning to VDI 6022

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

Schematic illustration of TDF-SA with square plenum box

① Diffuser face

② Central fixing screw

③ Plenum box

④ Cross bar

⑤ Suspension hole

⑥ Spigot

⑦ Lip seal (optional)

⑧ Damper blade for volume flow rate balancing (optional)

⑨ Pressure tap (optional)

⑩ Green cord for closing the damper unit (optional)

⑪ White cord for opening the damper unit (optional)

⑫ Measuring tube (optional)

⑬ Text label indicating plenum box variant (optional)

Ceiling swirl diffusers in air conditioning systems create a swirl to supply air to rooms. The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and room air. Ceiling swirl diffusers allow for large volume flow rates. The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone.

Type TDF ceiling swirl diffusers have fixed blades. Air discharge is horizontal radial. The supply air to room air temperature difference can be -12 to +10 K. A damper blade (optional) simplifies volume flow rate balancing for commissioning. Pressure tap and cord-operated damper blade (optional) allow for volume flow rate balancing with the diffuser face in place. To give rooms an aesthetic, uniform look, type TDF diffusers may also be used for extract air.

Nominal sizes	300, 400, 500, 600, 625 mm
Minimum volume flow rate, with Δtz = -6 K	10 – 42 l/s or 36 – 151 m³/h
Maximum volume flow rate, with LWA ≅ 50 dB(A)	80 – 265 l/s from 288 – 954 m³/h
Supply air to room air temperature difference	-12 – 10 K

Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures. The minimum volume flow rates apply to a supply air to room air temperature difference of -6 K. The maximum volume flow rates apply to a sound power level of approx. 50 dB (A) with damper blade position 0°. Exact values for all parameters can be determined with our Easy Product Finder design program.

TDF-SA-Q-Z-H (supply air), sound power level and total differential pressure

NS	qv [l/s]	qv [m³/h]	0°		45°		90°
NS	qv [l/s]	qv [m³/h]	Δpt [Pa]	LWA [dB(A)]	Δpt [Pa]	LWA [dB(A)]	Δpt [Pa]	LWA [dB(A)]
300	10	36	1	<15	1	<15	2	<15
300	35	126	14	27	16	26	29	26
300	60	216	40	40	46	39	86	41
300	80	288	71	50	83	49	153	53
400	18	65	1	<15	1	<15	3	<15
400	65	234	13	24	17	22	34	24
400	115	414	40	39	52	39	107	41
400	160	576	76	50	101	51	206	52
500	27	97	1	<15	2	<15	5	<15
500	80	288	12	23	16	22	47	26
500	135	486	34	37	45	37	134	43
500	195	702	71	50	95	51	280	56
600, 625	42	151	2	<15	2	<15	5	<15
600, 625	115	414	12	23	16	22	39	26
600, 625	185	666	32	38	41	36	101	41
600, 625	260	936	62	50	82	49	200	52

0°, 45°, 90°: Damper blade position

TDF-SA-R-Z-H (supply air), variant, sound power level and total differential pressure

NS	qv [l/s]	qv [m³/h]	0°		45°		90°
NS	qv [l/s]	qv [m³/h]	Δpt [Pa]	LWA [dB(A)]	Δpt [Pa]	LWA [dB(A)]	Δpt [Pa]	LWA [dB(A)]
300	10	36	1	<15	1	<15	2	<15
300	40	144	17	29	20	28	38	28
300	70	252	53	45	63	45	118	45
300	80	288	70	50	82	51	154	51
400	18	65	1	<15	1	<15	3	<15
400	65	234	12	23	15	22	35	24
400	115	414	39	38	45	38	110	41
400	160	576	76	50	88	50	212	51
500	27	97	1	<15	2	<15	5	<15
500	90	324	15	23	22	24	58	28
500	155	558	45	39	65	40	171	45
500	201	724	75	50	108	50	287	55
600, 625	42	151	2	<15	2	<15	5	<15
600, 625	130	468	16	26	21	25	50	30
600, 625	215	774	43	41	56	40	137	46
600, 625	265	954	65	50	86	48	208	53

0°, 45°, 90°: Damper blade position

TDF-SA-*-Z-V (supply air), sound power level and total differential pressure

NS	qv [l/s]	qv [m³/h]	0°		45°		90°
NS	qv [l/s]	qv [m³/h]	Δpt [Pa]	LWA [dB(A)]	Δpt [Pa]	LWA [dB(A)]	Δpt [Pa]	LWA [dB(A)]
300	10	36	1	<15	1	<15	2	<15
300	35	126	14	26	16	25	29	25
300	60	216	40	40	46	39	85	40
300	80	288	71	50	83	50	153	51
400	18	65	1	<15	1	<15	3	<15
400	65	234	12	23	16	25	35	24
400	115	414	39	39	50	40	110	42
400	155	558	71	50	91	51	200	53
500	27	97	1	<15	2	<15	5	<15
500	80	288	12	23	16	25	46	28
500	130	468	31	37	42	39	121	44
500	180	648	59	50	81	53	232	55
600, 625	42	151	2	<15	2	<15	5	<15
600, 625	115	414	13	26	19	28	42	32
600, 625	185	666	35	41	48	44	108	48
600, 625	230	828	54	49	74	52	166	57

0°, 45°, 90°: Damper blade position

Specification text

Ceiling swirl diffusers with square or circular diffuser face. Supply air and extract air variants for comfort zones. Diffuser face with fixed air control blades for horizontal swirling supply air discharge creating high induction levels. For installation in suspended ceilings of all kinds. Ready-to-install component which consists of the diffuser face and a plenum box, side entry or top entry spigot, and suspension holes or suspension brackets.

Special features

High induction results in a rapid reduction of the supply air to room air temperature difference and airflow velocity

For all types of ceiling systems, and with an extended border also suitable for freely suspended installation

Horizontal or vertical duct connection

Very high room air change rate possible thanks to row arrangement with a minimum pitch distance of 0.9 m

Materials and surfaces

Grille face made of galvanised sheet steel

Q; R: Plenum box made of galvanised sheet steel including galvanised sheet steel cross bar to support the diffuser face

Plenum boxes with vertical connection and square plenum boxes with horizontal connection: for supply air always with galvanised perforated plate for air distribution

Circular plenum boxes with horizontal spigot: Equipped as a plenum box for supply air with an equalising element made of polyester

Square plenum boxes and plenum boxes with vertical spigot: Spigot made of galvanised sheet steel

Circular plenum boxes with horizontal spigot: Spigot made of black ABS, according to UL94, V0 flame retardant

Lip seal made of Evoprene

Diffuser face powder-coated, RAL 9010, pure white

P1: Powder-coated, RAL Classic colour

Technical data

Nominal sizes: 300, 400, 500, 600, 625 mm

Minimum volume flow rate, with Δt_z = -6 K: 10 – 42 l/s or 36 – 151 m³/h

Maximum volume flow rate, at LWA ≅ 50 dB(A): 80 – 265 l/s or 288 – 954 m³/h

Supply air to room air temperature difference: -12 to +10 K

TDF-SA

–

500

P1 - RAL …

1 Type
TDF-SA Swirl diffuser

2 Construction style
Determines the variant of the plenum box
R circular
Q square

3 System
Z supply air
A extract air

4 Connection
H horizontal
V vertical

5 Damper blade for volume flow rate balancing
No entry required: without damper unit
M with damper unit
MN with cords and pressure tap (only with square plenum box)

6 Accessories
No entry required: without accessories
L With lip seal

7 Nominal size [mm]
300, 400, 500, 600, 625

8 Exposed surface
No entry required: powder-coated RAL 9010, pure white
P1 powder-coated, specify RAL CLASSIC colour

Gloss level
RAL 9010 GU50
RAL 9006 GU30
All other RAL colours GU70

Note: Circular plenum boxes with a horizontal spigot are only available without damper unit for volume flow rate balancing and lip seal or with damper unit for volume flow rate balancing and lip seal.Order example: TDF-SA–Q–Z–V–M–L/500/P1-RAL 9016

Style	Square
Air conditioning system	Supply air
Connection on	Vertical
Damper unit for volume flow rate balancing	With
Accessories	Lip seal
Nominal size	500
Exposed surface	RAL 9016, traffic white, gloss level GU70

Variants, Dimensions, Product details

TDF-SA-Q-*-H

Variant

With square plenum box for horizontal duct connection

Nominal sizes

300, 400, 500, 600, 625

Parts and characteristics

Square diffuser face
Square plenum box for horizontal duct connection
Square opening to accommodate the diffuser face
Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
Simple installation of the diffuser face due to central fixing screw with decorative cap
Damper blade for volume flow rate balancing (optional)
Pressure tap and cord-operated damper blade for volume flow rate balancing (optional)
Lip seal (optional)

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180
Spigot with groove for lip seal (if accessory lip seal has been ordered)

TDF-SA-Q-*-V

Variant

Ceiling swirl diffuser with square diffuser face
With plenum box for vertical duct connection

Nominal sizes

300, 400, 500, 600, 625

Parts and characteristics

Square diffuser face
Plenum box for vertical duct connection
Circular opening to accommodate the diffuser face
Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
Simple installation of the diffuser face due to central fixing screw with decorative cap
Damper blade for volume flow rate balancing (optional)
Lip seal (optional)

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180
Spigot with groove for lip seal (if accessory lip seal has been ordered)

TDF-SA-R-*-H

Variant

Ceiling swirl diffuser with circular diffuser face
With circular plenum box and horizontal duct connection

Nominal sizes

300, 400, 500, 600, 625

Parts and characteristics

Circular diffuser face
Plenum box for horizontal duct connection
Circular opening to accommodate the diffuser face
Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
Simple installation of the diffuser face due to central fixing screw with decorative cap
Damper blade for volume flow rate balancing (optional)
Pressure tap and cord-operated damper blade for volume flow rate balancing (optional)
Lip seal (optional)

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180
Spigot with groove for lip seal (if accessory lip seal has been ordered)

TDF-SA-R-*-V

Variant

Ceiling swirl diffuser with circular diffuser face
With circular plenum box for vertical duct connection

Nominal sizes

300, 400, 500, 600, 625

Parts and characteristics

Circular diffuser face
Circular plenum box for vertical duct connection
Circular opening to accommodate the diffuser face
Equalising element that ensures a uniform airflow through the diffuser face (supply air variant)
Simple installation of the diffuser face due to central fixing screw with decorative cap
Damper blade for volume flow rate balancing (optional)
Lip seal (optional)

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180
Spigot with groove for lip seal (if accessory lip seal has been ordered)

Square diffuser face with plenum box for horizontal duct connection

TDF-SA-Q-*-H

NS	□Q₁	H₁	□Q₃	∅D	A	C	①	m
NS								kg
300	298	8	290	158	139	50	AKUni001	4
400	398	8	372	198	164	50	AKUni002	6.2
500	498	8	476	198	164	50	AKUni003	8.5
600	598	8	567	248	199	48	AKUni004	11.6
625	623	8	567	248	199	48	AKUni004	11.9

Weights apply to the supply air variant.

TDF-SA-Q-*-V

NS	□Q₁	H₁	∅D₃	H₃	∅D	C	m
NS							kg
300	298	8	275	200	158	50	3
400	398	8	364	200	198	50	4.7
500	498	8	462	200	198	50	6.7
600	598	8	559	200	248	48	8.9
625	623	8	559	200	248	48	9.2

Weights apply to the supply air variant.

TDF-SA-R-*-H

NS	∅D₁	H₁	H₃	∅D₃	∅D	A	①	m
NS								kg
300	300	8	243	274	158	139	AKR-01	2.4
400	400	8	290	363	198	166	AKR-02	3.8
500	500	8	290	461	198	166	AKR-03	5.2
600	600	8	344	574	248	195	AKR-05	7.4
625	625	8	344	574	248	195	AKR-05	7.6

Weights apply to the supply air variant.

TDF-SA-R-*-V

NS	∅D₁	H₁	H₃	∅D₃	∅D	C	m
NS							kg
300	300	8	200	275	158	50	2.8
400	400	8	200	364	198	50	4.4
500	500	8	200	462	198	50	6.3
600	600	8	200	559	248	48	8.5
625	625	8	200	559	248	48	8.7

Weights apply to the supply air variant.

TFD-Q

NS	□Q₁	∅D₂	A_eff
NS			m²
300	298	254	0.0108
400	398	336	0.0193
500	498	440	0.0280
600	598	530	0.0400
625	623	530	0.0400

TDF-R

NS	∅D₁	∅D₂	A_eff
NS			m²
300	300	250	0.0088
400	400	350	0.0180
500	500	450	0.0251
600	600	538	0.0295
625	625	538	0.0295

Installation in T-bar ceilings

Installation and commissioning

Preferably for rooms with a clear height up to 4.0 m
Flush ceiling installation
Freely suspended installation only with an extended border (supply air variant)
Horizontal or vertical duct connection
If necessary, carry out volume flow rate balancing with the damper element

Note: The illustrations are schematic and serve to create a better understanding of the installation details.

Volume flow rate balancing

When several diffusers are connected to just one volume flow controller, it may be necessary to balance the volume flow rates.

Ceiling diffusers with universal plenum box and damper blade (variant -M): The diffuser face can be removed to access the damper blade; the damper blade can then be set to any position between 0 and 90°
Ceiling diffusers with universal plenum box, damper blade and pressure tap (variant -MN): The diffuser face need not be removed as the damper blade can be set with two cords (white and green).

Volume flow rate measurement

Ceiling diffusers with universal plenum box, damper blade and pressure tap (variant -MN) allow for volume flow rate balancing, even with the diffuser face in place.

Connect the measuring tube to the digital manometer
Read the effective pressure
Read the volume flow rate off the characteristic or calculate it
If necessary, adjust the damper blade position with the cords

A characteristic is included with each AK-Uni plenum box.

Downloads

product information

Product data sheet Type TDF-SilentAir

TDF-SilentAIR_PD_2022_02_24_DE_en Product data sheet 26 MB pdf

certificates

Declaration of hygiene conformity Type TDF-SilentAIR

TDF-SilentAir_HC_2024_05_DE_en Hygiene certificate 1,7 MB pdf
Environmental Product Declaration TDF

TDF_EPD_2024_11_DE_en Environmental Product Declaration 1 MB pdf

operation manuals

Installation manual Ceiling diffusers

A00000054447 Installation manual 520 KB pdf
Installation manual Air terminal devices

IM_2018_06_A00000054447 Installation manual 1,2 MB pdf

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NS	□Q₁	H₁	∅D₃	H₃	∅D	C	m
NS							kg
300	298	8	275	200	158	50	3
400	398	8	364	200	198	50	4.7
500	498	8	462	200	198	50	6.7
600	598	8	559	200	248	48	8.9
625	623	8	559	200	248	48	9.2

NS	∅D₁	H₁	H₃	∅D₃	∅D	C	m
NS							kg
300	300	8	200	275	158	50	2.8
400	400	8	200	364	198	50	4.4
500	500	8	200	462	198	50	6.3
600	600	8	200	559	248	48	8.5
625	625	8	200	559	248	48	8.7

NS	□Q₁	H₁	∅D₃	H₃	∅D	C	m
NS							kg
300	298	8	275	200	158	50	3
400	398	8	364	200	198	50	4.7
500	498	8	462	200	198	50	6.7
600	598	8	559	200	248	48	8.9
625	623	8	559	200	248	48	9.2

NS	∅D₁	H₁	H₃	∅D₃	∅D	C	m
NS							kg
300	300	8	200	275	158	50	2.8
400	400	8	200	364	198	50	4.4
500	500	8	200	462	198	50	6.3
600	600	8	200	559	248	48	8.5
625	625	8	200	559	248	48	8.7

TDF-SILENTAIR

WITH VERY LOW SOUND POWER LEVEL FOR COMFORT ZONES, WITH FIXED AIR CONTROL BLADES

General information

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

Variants, Dimensions, Product details

Downloads

product information

Product data sheet Type TDF-SilentAir

certificates

Declaration of hygiene conformity Type TDF-SilentAIR

Environmental Product Declaration TDF

operation manuals

Installation manual Ceiling diffusers

Installation manual Air terminal devices

TROX Services

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE

NS	□Q₁	H₁	∅D₃	H₃	∅D	C	m
NS							kg
300	298	8	275	200	158	50	3
400	398	8	364	200	198	50	4.7
500	498	8	462	200	198	50	6.7
600	598	8	559	200	248	48	8.9
625	623	8	559	200	248	48	9.2

NS	∅D₁	H₁	H₃	∅D₃	∅D	C	m
NS							kg
300	300	8	200	275	158	50	2.8
400	400	8	200	364	198	50	4.4
500	500	8	200	462	198	50	6.3
600	600	8	200	559	248	48	8.5
625	625	8	200	559	248	48	8.7