Flowbar Slot Diffusers (FBD) – alugridx.com

Jet Diffusers

Introduction

1 Slot – Flange Type

VERTICAL THROW MODEL (FBD-F)

ALUGRIDX Flowbar Slot Diffuser is designed for high airflow quantities suitable for ceiling applications.
Air pattern can be controlled using pattern controllers, powder-coated black, if required.
Curve is available upon request for 1 Slot Flowbar diffuser.
A 3 Slot Flowbar Diffuser is available upon request.

DIMENSIONS AND DETAILS (1 SLOT)

Slot Size	FL	S	N	F	H
1 Slot (25 mm)	41	25	70	107	42
1 Slot (38 mm)	48	38	95	134	42
1 Slot (51 mm)	54	51	121	159	42

Air Movement

1 Slot – Hidden Frame 45°

VERTICAL THROW MODEL (FBD50-HF)

ALUGRIDX Flowbar Slot Diffuser is designed for high airflow quantities suitable for ceiling applications.
Air pattern can be controlled using pattern controllers, powder-coated black, if required.

DIMENSIONS AND DETAILS (1 SLOT)

Slot Size	FL	S	N	F	H
1 Slot (25 mm)	41	25	70	107	42
1 Slot (38 mm)	48	38	95	134	42
1 Slot (51 mm)	54	51	121	159	42

Air Movement

1 Slot – Plaster Hidden Frame 45°

HORIZONTAL THROW MODEL (FBD50-PHF)

ALUGRIDX Flowbar Slot Diffuser Plaster Hidden Frame is designed for high airflow quantities suitable for ceiling applications.
Air pattern can be controlled using pattern controllers, powder-coated black, if required.

DIMENSIONS AND DETAILS (1 SLOT)

Slot Size	FL	S	N	F	H
1 Slot (25 mm)	41	25	70	107	42
1 Slot (38 mm)	48	38	95	134	42
1 Slot (51 mm)	54	51	121	159	42

Air Movement

DIMENSIONS AND DETAILS (2 SLOT)

Slot Type	FL	S	C	N	F	H
2 Slot (23 mm)	41	23	41	132	170	42
2 Slot (42 mm)	48	42	41	182	220	42
2 Slot (62 mm)	54	62	41	235	273	42

Air Movement

1 Slot – Hidden Frame 90°

VERTICAL THROW MODEL (FBD50-HF)

ALUGRIDX Flowbar Slot Diffuser is designed for high airflow quantities suitable for ceiling applications.
Air pattern can be controlled using pattern controllers, powder-coated black, if required.
Curve is available upon request for 1 Slot Flowbar diffuser.
A 3 Slot Flowbar Diffuser is available upon request.

DIMENSIONS AND DETAILS (1 SLOT)

Slot Size	FL	S	N	F	H
1 Slot (25 mm)	41	25	70	107	42
1 Slot (38 mm)	48	38	95	134	42
1 Slot (51 mm)	54	51	121	159	42

Air Movement

2 Slot – Hidden Frame 45°

DIMENSIONS AND DETAILS (2 SLOT)

Slot Type	FL	S	C	N	F	H
2 Slot (23 mm)	41	23	41	132	170	42
2 Slot (42 mm)	48	42	41	182	220	42
2 Slot (62 mm)	54	62	41	235	273	42

Air Movement

2 Slot – Hidden Frame 90°

DIMENSIONS AND DETAILS (2 SLOT)

Slot Type	FL	S	C	N	F	H
2 Slot (23 mm)	41	23	41	132	170	42
2 Slot (42 mm)	48	42	41	182	220	42
2 Slot (62 mm)	54	62	41	235	273	42

Air Movement

Performance Data

1 Slot

25 mm Slot Width

Parameter	36	58	79	101	122	144	165
Airflow (l/s)	36	58	79	101	122	144	165
Static Pressure (Pa)	7	18	34	55	81	112	148
NC (Noise Criteria)	<10	16	26	33	39	44	49
Throw (m)	1.5–2.5–4.3	2.8–4–5.5	3.8–4.5–6.5	4.3–5.3–7.3	4.5–5.8–8.3	5.3–6–8.8	5.5–6.8–9.5

38 mm Slot Width

Parameter	43	65	86	108	129	151	173
Airflow (l/s)	43	65	86	108	129	151	173
Static Pressure (Pa)	8	18	32	51	73	99	129
NC (Noise Criteria)	<10	14	24	31	37	42	48
Throw (m)	1.8–3–5	3–4.3–5.8	4–5–6.8	4.3–5.5–7.5	5–5.8–8.3	5.3–6.5–8.8	5.5–6.8–9.8

51 mm Slot Width

Parameter	43	72	101	129	158	187	216
Airflow (l/s)	43	72	101	129	158	187	216
Static Pressure (Pa)	5	14	28	46	68	95	127
NC (Noise Criteria)	<10	11	22	30	36	41	46
Throw (m)	1.5–2.8–5	2.8–4.3–6	4–5.3–7.3	5–5.8–8.3	5.3–6.5–9.3	5.8–7–10	6–7.5–10.8

2 Slot

23 mm Slot Width

Parameter	36	58	79	101	122	144	165
Airflow (l/s)	36	58	79	101	122	144	165
Static Pressure (Pa)	4	9	20	30	42	51	62
NC (Noise Criteria)	<10	<15	<15	25	30	33	38
Throw (m)	1–1.2–2.1	1.4–2–2.8	1.9–2.3–3.3	2.2–2.7–3.6	2.3–2.9–4.2	2.7–3–4.4	2.8–3.4–4.8

42 mm Slot Width

Parameter	43	65	86	108	129	151	173
Airflow (l/s)	43	65	86	108	129	151	173
Static Pressure (Pa)	4	9	19	23	35	40	52
NC (Noise Criteria)	<10	<15	<15	20	30	32	35
Throw (m)	1–1.5–2.5	1.5–2.2–2.9	2–2.5–3.4	2.2–2.8–3.7	2.5–2.9–4.2	2.7–3.3–4.4	2.8–3.4–4.9

62 mm Slot Width

Parameter	43	72	101	129	158	187	216
Airflow (l/s)	43	72	101	129	158	187	216
Static Pressure (Pa)	3	7	14	21	31	38	51
NC (Noise Criteria)	<10	<15	<15	18	20	30	35
Throw (m)	1–1.4–2.5	1.4–2.2–3	2–2.6–3.4	2.5–2.9–4.2	2.7–3.2–4.7	2.9–3.5–5	3–3.8–5.4

Pressure Loss

Pressure Loss data is applicable under the condition of inlet duct velocities below 4 m/sec.

Isothermal throw values are furnished for terminal velocities of 0.3, 0.5, and 0.8 m/sec.

Throw Corrections

For a 600 mm section, the throw values are 0.72 times those indicated.
For a continuous length of 3000 mm, the throw values increase by 1.7 times the shown values.
For 3600 mm, the multiplier is 1.8 times.

Air Pattern Notes

Provided values are for 1-way air pattern.
For divided airflow, select airflow per direction based on number of slots aimed in that direction (total airflow splits across aimed slots).

Noise Criteria Notes

Each NC value represents the noise criteria curve such that the sound pressure across octave bands (2nd through 7th) will not surpass it.
Measured with room absorption of 10 dB, equivalent to 10¹² Watts, using a 1200 mm section (other lengths require correction — see table A).

Test Conditions

Tests performed without Plenum effect (no pressure or sound influence).
Throw values are based on 1-way slot discharge.
Pressures shown in Pascal (Pa).
Throw values derived from active sections of 1200 mm.

TABLE A — NC Correction with Length

Length (mm)	600	1200	1800	2400	3000
Supply	-3	0	+2	+3	+5
Return	0	+3	+5	+6	+8

TABLE B — Throw Correction with Length

Length (mm)	600	1200	2400	3000	3600
Throw Correction	0.72	1	1.5	1.7	1.8