Type QLV

Polygon casing, 90° or 180° air discharge, for comfort and industrial zones

Polygon displacement flow diffusers

  • Spigot diameter 160 – 630 mm, nominal height 500 – 1750 mm
  • Volume flow rate range 17 – 915 l/s or 62 – 3295 m³/h
  • Perforated plate, square pitch
  • Circular duct connection
  • Duct connection at the top or bottom
  • Integral airflow straightener and conical equalising element


Optional equipment and accessories

  • Wall mount
  • Damper blade for volume flow rate balancing
  • Exposed surface in RAL CLASSIC colours

QLV-180-O 00132318_0


  • Application
  • Description

Application

  • Type QLV displacement flow diffusers are used as supply air units for industrial and comfort zones
  • Attractive design element for building owners and architects with demanding aesthetic requirements
  • Floor-standing installation on walls or in corners
  • Low-velocity airflow, causing only low levels of induction and resulting in low-turbulence displacement ventilation.
  • Excellent air quality in the occupied zone
  • Draught-free and economical ventilation and air conditioning also of larger internal spaces such as shop floors or auditoriums, with several displacement flow diffusers in a regular arrangement
  • For variable and constant volume flows
  • For supply air to room air temperature differences from –6 to –1 K

Special characteristics

  • Three-way or five-way air discharge
  • Duct connection at the top or bottom
  • Optional damper blade for volume flow rate balancing

Nominal sizes

  • ∅D: 160, 200, 250, 315, 400, 500, 630 mm
  • H: 500, 600, 800, 1000, 1250, 1500, 1750 mm

Variants

  • QLV-90: 90° air discharge
  • QLV-180: 180° air discharge
  • QLV-...-O: Spigot at the top
  • QLV-...-U: Spigot at the bottom

Parts and characteristics

  • Polygon casing
  • Equalising element and airflow straightener that ensure a uniform supply air discharge
  • Lip seal, optional for QLV-...-O

Attachments

  • Damper blade for volume flow rate balancing

Accessories

  • Lip seal
  • Wall mount

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180

Materials and surfaces

  • Top cover, base, spigot and side parts made of galvanised sheet steel
  • S7: Top cover and base made of aluminium
  • Corner and edge trims are extruded aluminium sections
  • Airflow straightener made of plastic
  • Equalising element made of synthetic fibres
  • Lip seal made of rubber
  • Surface powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour
  • S7: Surface galvanised

Standards and guidelines

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

Maintenance

  • Maintenance-free 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

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

Functional description

Displacement flow diffusers discharge the air from air conditioning systems with a low velocity and near the floor. The low-turbulence airflow creates a pool of fresh air that covers the entire floor area. The convection from people and other heat sources causes the fresh air from the pool to rise and create comfortable conditions in the occupied zone.

This draught-free and economical type of ventilation is also suitable for large internal spaces, such as auditoriums or shop floors, with several regularly arranged units.

Displacement ventilation is characterised by low airflow velocities and low turbulence. The air quality in the occupied zone is very high.

Displacement ventilation with air discharge near the floor is suitable only for cooling. The maximum supply air to room air temperature difference is –6 K.

Type QLV displacement flow diffusers include an equalising element and air straightener that ensure a uniform air distribution across the entire diffuser area. The perforated sheet metal diffuser face helps to equalise the airflow further. Three-way (90°) or five-way (180°) air discharge.

With displacement ventilation, i.e. air discharge near the floor, extract air units should be installed in the upper part of a room, above the occupied zone.

Nominal sizes

160 × 500 to 630 × 1750 mm

Minimum volume flow rate, at 0.1 m/s

17 – 305 l/s or 62 – 1098 m³/h

Maximum volume flow rate, at 0.3 m/s

52 – 915 l/s or 185 – 3295 m³/h

Supply air to room air temperature difference

–6 to –1 K

Sound power level, at 0.3 m/s

43 dB(A) max.


Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

QLV-90, sound power level, total differential pressure and near zone

Nominal size V v0 Damper blade position Lnz
Nominal size V v0 45° 90° Lnz
Nominal size V v0 Δpt LWA Δpt LWA Δpt LWA Lnz
Nominal size l/s m³/h m/s Pa dB(A) Pa dB(A) Pa dB(A) m

160 × 500

17

62

0.10

<3

<15

3

<15

5

<15

160 × 500

26

93

0.15

4

<15

6

<15

11

<15

160 × 500

34

124

0.20

7

<15

11

<15

20

16

160 × 500

52

185

0.30

16

<15

25

21

45

28

200 × 500

21

75

0.10

<3

<15

<3

<15

3

<15

200 × 500

31

113

0.15

3

<15

4

<15

7

<15

200 × 500

42

151

0.20

4

<15

7

<15

13

<15

200 × 500

63

226

0.30

10

<15

17

16

28

23

250 × 500

26

92

0.10

<3

<15

<3

<15

<3

<15

250 × 500

39

139

0.15

<3

<15

3

<15

5

<15

250 × 500

51

185

0.20

3

<15

5

<15

8

<15

250 × 500

77

277

0.30

7

<15

11

<15

18

19

160 × 600

21

74

0.10

<3

<15

4

<15

7

<15

160 × 600

31

111

0.15

5

<15

9

<15

16

<15

160 × 600

41

149

0.20

9

<15

16

<15

28

21

160 × 600

62

223

0.30

20

19

35

26

62

32

200 × 600

25

91

0.10

<3

<15

<3

<15

4

<15

200 × 600

38

136

0.15

3

<15

6

<15

10

<15

200 × 600

50

181

0.20

6

<15

10

<15

17

16

200 × 600

75

272

0.30

13

<15

22

21

39

28

250 × 600

31

111

0.10

<3

<15

<3

<15

3

<15

250 × 600

46

167

0.15

<3

<15

4

<15

6

<15

250 × 600

62

222

0.20

4

<15

7

<15

11

<15

250 × 600

93

333

0.30

9

<15

15

16

25

23

315 × 600

38

138

0.10

<3

<15

<3

<15

<3

<15

315 × 600

57

206

0.15

<3

<15

<3

<15

4

<15

315 × 600

76

275

0.20

3

<15

4

<15

7

<15

315 × 600

115

413

0.30

6

<15

10

<15

16

19

160 × 800

28

99

0.10

4

<15

7

<15

12

<15

160 × 800

41

149

0.15

8

<15

15

<15

27

20

160 × 800

55

198

0.20

14

<15

26

23

47

28

160 × 800

83

298

0.30

32

26

59

34

107

40

200 × 800

34

121

0.10

<3

<15

4

<15

7

<15

200 × 800

50

181

0.15

5

<15

9

<15

17

16

200 × 800

67

242

0.20

9

<15

17

17

30

24

200 × 800

101

363

0.30

20

21

38

29

66

35

250 × 800

41

148

0.10

<3

<15

3

<15

5

<15

250 × 800

62

223

0.15

3

<15

6

<15

11

<15

250 × 800

82

297

0.20

6

<15

11

<15

19

20

250 × 800

124

445

0.30

13

16

24

24

42

31

315 × 800

51

184

0.10

<3

<15

<3

<15

3

<15

315 × 800

77

276

0.15

<3

<15

4

<15

7

<15

315 × 800

102

367

0.20

4

<15

7

<15

12

15

315 × 800

153

551

0.30

9

<15

16

18

27

27

400 × 800

64

230

0.10

<3

<15

<3

<15

<3

<15

400 × 800

96

344

0.15

<3

<15

3

<15

4

<15

400 × 800

128

459

0.20

<3

<15

5

<15

7

<15

400 × 800

191

689

0.30

6

<15

10

<15

17

22

160 × 1000

34

124

0.10

5

<15

10

<15

18

<15

0.8

160 × 1000

52

186

0.15

11

<15

22

21

40

26

1.0

160 × 1000

69

248

0.20

20

21

40

29

72

34

160 × 1000

103

373

0.30

46

32

89

40

162

45

200 × 1000

42

151

0.10

3

<15

6

<15

11

<15

0.8

200 × 1000

63

227

0.15

7

<15

14

15

25

22

1.0

200 × 1000

84

303

0.20

13

15

25

23

45

30

200 × 1000

126

454

0.30

29

27

56

35

100

41

250 × 1000

52

186

0.10

<3

<15

4

<15

7

<15

0.8

250 × 1000

77

279

0.15

5

<15

9

<15

16

17

1.0

250 × 1000

103

372

0.20

8

<15

16

18

28

25

250 × 1000

155

557

0.30

18

21

36

30

63

37

315 × 1000

64

230

0.10

<3

<15

3

<15

4

<15

0.8

315 × 1000

96

345

0.15

3

<15

6

<15

10

<15

1.0

315 × 1000

128

460

0.20

5

<15

10

<15

18

21

315 × 1000

192

690

0.30

12

16

23

24

40

32

400 × 1000

80

287

0.10

<3

<15

<3

<15

3

<15

0.8

400 × 1000

120

431

0.15

<3

<15

4

<15

6

<15

1.0

400 × 1000

160

574

0.20

3

<15

7

<15

11

17

400 × 1000

239

862

0.30

8

<15

15

19

25

28

500 × 1000

98

354

0.10

<3

<15

<3

<15

<3

<15

0.8

500 × 1000

147

531

0.15

<3

<15

3

<15

4

<15

1.0

500 × 1000

197

708

0.20

<3

<15

4

<15

7

<15

500 × 1000

295

1062

0.30

5

<15

10

<15

16

24

315 × 1250

80

288

0.10

<3

<15

4

<15

7

<15

1.1

315 × 1250

120

431

0.15

4

<15

9

<15

15

19

1.4

315 × 1250

160

575

0.20

7

<15

15

19

26

27

1.6

315 × 1250

240

863

0.30

16

22

34

30

60

38

2.0

400 × 1250

100

359

0.10

<3

<15

<3

<15

4

<15

1.1

400 × 1250

150

539

0.15

3

<15

5

<15

9

<15

1.4

400 × 1250

200

719

0.20

5

<15

10

<15

16

22

1.6

400 × 1250

299

1078

0.30

10

16

22

25

37

34

2.0

500 × 1250

123

443

0.10

<3

<15

<3

<15

3

<15

1.1

500 × 1250

184

664

0.15

<3

<15

4

<15

6

<15

1.4

500 × 1250

246

886

0.20

3

<15

6

<15

11

18

1.6

500 × 1250

369

1328

0.30

7

<15

15

20

24

30

2.0

630 × 1250

153

551

0.10

<3

<15

<3

<15

<3

<15

1.1

630 × 1250

230

827

0.15

<3

<15

<3

<15

4

<15

1.4

630 × 1250

306

1103

0.20

<3

<15

4

<15

7

<15

1.6

630 × 1250

459

1654

0.30

5

<15

10

15

15

25

2.0

400 × 1500

120

432

0.10

<3

<15

3

<15

6

<15

1.5

400 × 1500

180

647

0.15

3

<15

8

<15

13

19

1.8

400 × 1500

240

863

0.20

6

<15

13

19

23

27

2.1

400 × 1500

360

1295

0.30

14

21

30

30

51

38

2.7

500 × 1500

148

532

0.10

<3

<15

<3

<15

4

<15

1.5

500 × 1500

222

797

0.15

<3

<15

5

<15

8

<15

1.8

500 × 1500

295

1063

0.20

4

<15

9

<15

15

23

2.1

500 × 1500

443

1595

0.30

9

15

20

25

33

34

2.7

630 × 1500

184

662

0.10

<3

<15

<3

<15

<3

<15

1.5

630 × 1500

276

993

0.15

<3

<15

3

<15

5

<15

1.8

630 × 1500

368

1324

0.20

3

<15

6

<15

9

19

2.1

630 × 1500

552

1986

0.30

6

<15

13

20

21

30

2.7

630 × 1750

215

773

0.10

<3

<15

<3

<15

3

<15

1.9

630 × 1750

322

1159

0.15

<3

<15

4

<15

7

<15

2.4

630 × 1750

429

1545

0.20

3

<15

8

<15

12

23

2.8

630 × 1750

644

2318

0.30

7

<15

17

24

28

34

3.6

<: 0.2 m/s are not achieved

The near zone values are based on a supply air to room air temperature difference of –3 K


QLV-180, sound power level, total differential pressure and near zone

Nominal size V v0 Damper blade position Lnz
Nominal size V v0 45° 90° Lnz
Nominal size V v0 Δpt LWA Δpt LWA Δpt LWA Lnz
Nominal size l/s m³/h m/s Pa dB(A) Pa dB(A) Pa dB(A) m

160 × 500

25

89

0.10

3

<15

5

<15

10

<15

160 × 500

37

134

0.15

8

<15

12

<15

23

20

160 × 500

49

178

0.20

13

<15

22

21

40

28

160 × 500

74

267

0.30

30

25

49

32

91

39

200 × 500

30

108

0.10

<3

<15

3

<15

6

<15

200 × 500

45

162

0.15

5

<15

8

<15

14

15

200 × 500

60

217

0.20

9

<15

14

15

25

23

200 × 500

90

325

0.30

19

19

31

27

57

35

250 × 500

37

132

0.10

<3

<15

<3

<15

4

<15

250 × 500

55

198

0.15

3

<15

5

<15

9

<15

250 × 500

73

263

0.20

6

<15

9

<15

16

19

250 × 500

110

395

0.30

13

<15

20

21

36

30

160 × 600

30

107

0.10

4

<15

8

<15

14

<15

160 × 600

45

160

0.15

10

<15

17

17

32

24

160 × 600

59

214

0.20

17

18

30

26

56

32

160 × 600

89

320

0.30

39

29

68

37

126

44

200 × 600

36

130

0.10

3

<15

5

<15

9

<15

200 × 600

54

195

0.15

6

<15

11

<15

20

20

200 × 600

72

260

0.20

11

<15

19

20

35

28

200 × 600

108

390

0.30

25

24

43

32

79

39

250 × 600

44

158

0.10

<3

<15

3

<15

5

<15

250 × 600

66

237

0.15

4

<15

7

<15

12

15

250 × 600

88

316

0.20

7

<15

12

<15

22

23

250 × 600

132

474

0.30

16

18

27

26

49

35

315 × 600

54

196

0.10

<3

<15

<3

<15

3

<15

315 × 600

82

294

0.15

3

<15

4

<15

8

<15

315 × 600

109

391

0.20

5

<15

8

<15

14

19

315 × 600

163

587

0.30

11

<15

18

21

31

30

160 × 800

40

142

0.10

7

<15

13

<15

24

21

160 × 800

59

214

0.15

16

17

29

25

54

32

160 × 800

79

285

0.20

28

25

51

33

96

40

160 × 800

119

427

0.30

63

37

116

45

216

51

200 × 800

48

173

0.10

4

<15

8

<15

15

16

200 × 800

72

260

0.15

10

<15

18

20

33

27

200 × 800

96

346

0.20

18

20

32

28

59

36

200 × 800

144

520

0.30

39

31

72

39

134

47

250 × 800

59

211

0.10

3

<15

5

<15

9

<15

250 × 800

88

316

0.15

6

<15

11

<15

21

23

250 × 800

117

421

0.20

11

<15

20

23

37

31

250 × 800

176

632

0.30

25

26

46

34

83

42

315 × 800

72

261

0.10

<3

<15

3

<15

6

<15

315 × 800

109

391

0.15

4

<15

7

<15

13

19

315 × 800

145

522

0.20

7

<15

13

18

23

27

315 × 800

217

783

0.30

16

20

29

29

52

38

400 × 800

91

326

0.10

<3

<15

<3

<15

4

<15

400 × 800

136

489

0.15

3

<15

5

<15

8

<15

400 × 800

181

652

0.20

5

<15

8

<15

15

22

400 × 800

272

978

0.30

10

<15

19

24

33

33

160 × 1000

49

178

0.10

10

<15

20

20

37

26

0.8

160 × 1000

74

267

0.15

22

23

44

31

82

38

1.0

160 × 1000

99

356

0.20

40

31

78

39

146

46

160 × 1000

148

534

0.30

90

43

176

51

329

57

200 × 1000

60

217

0.10

6

<15

12

<15

22

22

0.8

200 × 1000

90

325

0.15

14

17

27

26

51

33

1.0

200 × 1000

120

433

0.20

25

25

49

34

90

41

200 × 1000

180

650

0.30

56

37

109

45

202

53

250 × 1000

73

263

0.10

4

<15

8

<15

14

17

0.8

250 × 1000

110

395

0.15

9

<15

17

21

31

29

1.0

250 × 1000

146

527

0.20

16

20

30

29

55

37

250 × 1000

219

790

0.30

35

31

68

40

125

48

315 × 1000

91

326

0.10

<3

<15

5

<15

9

<15

0.8

315 × 1000

136

489

0.15

6

<15

11

15

19

24

1.0

315 × 1000

181

652

0.20

10

<15

19

23

35

32

315 × 1000

272

978

0.30

22

26

43

35

78

44

400 × 1000

113

408

0.10

<3

<15

3

<15

5

<15

0.8

400 × 1000

170

611

0.15

4

<15

7

<15

12

20

1.0

400 × 1000

226

815

0.20

6

<15

12

18

22

28

400 × 1000

340

1223

0.30

14

20

27

29

48

39

500 × 1000

140

503

0.10

<3

<15

<3

<15

3

<15

0.8

500 × 1000

210

755

0.15

<3

<15

5

<15

8

16

1.0

500 × 1000

280

1006

0.20

4

<15

8

<15

14

24

500 × 1000

419

1509

0.30

9

<15

18

25

31

35

315 × 1250

113

408

0.10

3

<15

7

<15

13

19

1.1

315 × 1250

170

612

0.15

8

<15

16

21

29

30

1.4

315 × 1250

227

815

0.20

14

20

29

29

52

38

1.6

315 × 1250

340

1223

0.30

31

32

65

41

117

49

1.9

400 × 1250

142

509

0.10

<3

<15

5

<15

8

<15

1.1

400 × 1250

212

764

0.15

5

<15

10

16

18

25

1.4

400 × 1250

283

1019

0.20

9

<15

18

24

32

34

1.6

400 × 1250

425

1528

0.30

20

26

41

35

72

45

2.0

500 × 1250

175

629

0.10

<3

<15

3

<15

5

<15

1.1

500 × 1250

262

943

0.15

3

<15

7

<15

12

21

1.4

500 × 1250

349

1258

0.20

6

<15

12

19

21

29

1.7

500 × 1250

524

1887

0.30

13

21

27

31

47

41

2.1

630 × 1250

218

785

0.10

<3

<15

<3

<15

3

<15

1.1

630 × 1250

327

1177

0.15

<3

<15

4

<15

7

17

1.4

630 × 1250

436

1569

0.20

4

<15

8

<15

13

25

1.7

630 × 1250

654

2354

0.30

9

15

18

26

30

37

2.1

400 × 1500

170

611

0.10

3

<15

6

<15

11

19

1.5

400 × 1500

255

917

0.15

6

<15

14

21

25

30

1.8

400 × 1500

340

1223

0.20

12

19

25

29

45

38

2.2

400 × 1500

509

1834

0.30

26

31

57

40

101

50

2.7

500 × 1500

210

755

0.10

<3

<15

4

<15

7

<15

1.5

500 × 1500

314

1132

0.15

4

<15

9

16

16

26

1.9

500 × 1500

419

1509

0.20

8

<15

16

24

29

34

2.2

500 × 1500

629

2264

0.30

17

25

37

36

65

46

2.8

630 × 1500

262

941

0.10

<3

<15

3

<15

5

<15

1.5

630 × 1500

392

1412

0.15

3

<15

6

<15

10

22

1.9

630 × 1500

523

1883

0.20

5

<15

11

19

18

30

2.3

630 × 1500

785

2824

0.30

11

20

24

31

41

41

2.9

630 × 1750

305

1098

0.10

<3

<15

3

<15

6

<15

1.9

630 × 1750

458

1648

0.15

3

<15

8

15

14

26

2.5

630 × 1750

610

2197

0.20

6

<15

14

23

24

34

3.0

630 × 1750

915

3295

0.30

14

24

31

35

54

45

4.0

<: 0.2 m/s are not achieved

The near zone values are based on a supply air to room air temperature difference of –3 K


Displacement flow diffusers for air discharge near the floor, suitable for comfort and industrial zones with special demands on architecture and design.

With three-way (90°) or five-way (180°) air discharge for low-turbulence displacement ventilation. Polygon casing for installation on a wall.

Ready-to-install component which consists of a casing with spigot at the top or bottom, an equalising element and airflow straightener that ensure uniform supply air discharge, and a perforated sheet metal diffuser face. Spigot suitable for circular ducts.

Spigot suitable for ducts to EN 13180.

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

Special characteristics

  • Three-way or five-way air discharge
  • Duct connection at the top or bottom
  • Optional damper blade for volume flow rate balancing

Materials and surfaces

  • Top cover, base, spigot and side parts made of galvanised sheet steel
  • S7: Top cover and base made of aluminium
  • Corner and edge trims are extruded aluminium sections
  • Airflow straightener made of plastic
  • Equalising element made of synthetic fibres
  • Lip seal made of rubber
  • Surface powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour
  • S7: Surface galvanised

Technical data

  • Nominal sizes: 160 × 500 to 630 × 1750 mm
  • Minimum volume flow rate, at 0.1 m/s: 17 – 305 l/s or 62 – 1098 m³/h
  • Maximum volume flow rate, at 0.3 m/s: 52 – 915 l/s or 185 – 3295 m³/h
  • Supply air to room air temperature difference: –6 to –1 K
  • Sound power level, at 0.3 m/s: 43 dB(A) max.

Sizing data

  • V _______________________ [m³/h]
  • Δpt _______________________ [Pa]

Air-regenerated noise

  • LWA _______________________ [dB(A)]

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

00135936_0

 Type
QLV       Displacement flow diffuser

 Air discharge
90       Three-way
180       Five-way

 Connection
       Circular spigot
O       Top
U       Bottom

 Damper blade for volume flow rate balancing
       No entry: none
M       With

 

 Lip seal
       No entry: none
L       With (only for top spigot)
       Bottom spigots always have a lip seal

 Nominal size [mm]
       ∅D × H
       Spigot diameter × nominal height

 Fixing
       No entry: none
W0       With material for wall fixing

 Exposed surface
       No entry: powder-coated
       RAL 9010, pure white
P1       Powder-coated, specify RAL CLASSIC colour
S7       Uncoated (galvanised steel, untreated aluminium)

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Order example: QLV–180–U/250×500/P1-RAL 9016

Air discharge

Five-way

Connection

Circular spigot at the bottom

Damper blade for volume flow rate balancing

Without

Lip seal

Without

Nominal size

250 × 500 mm

Fixing

Without

Exposed surface

RAL 9016, traffic white, gloss level 70 %


 

Variants, Accessories, Dimensions and weight

  • Variants
  • Accessories
  • Dimensions and weight
Wall fixing 00224229_0
① Wall mount, inner part


The nominal size (nominal width × nominal height) is equal to the discharge opening.

QLV-90

Nominal size
B1
mm
H1
mm
T1
mm
ØD
mm
A
mm
m
kg
160×500 250 500 250 158 115 6
200×500 295 500 295 198 135 6
250×500 350 500 350 248 160 8
160×600 250 600 250 158 115 9
200×600 295 600 295 198 135 7
250×600 350 600 350 248 160 8
315×600 420 600 420 313 193 9
160×800 250 800 250 158 115 11
200×800 295 800 295 198 135 8
250×800 350 800 350 248 160 9
315×800 420 800 420 313 193 11
400×800 510 800 510 398 235 13
160×1000 250 1000 250 158 115 12
200×1000 295 1000 295 198 135 14
250×1000 350 1000 350 248 160 16
315×1000 420 1000 420 313 193 21
400×1000 510 1000 510 398 235 18
500×1000 615 1000 615 498 285 20
315×1250 420 1250 420 313 193 26
400×1250 510 1250 510 398 235 29
500×1250 615 1250 615 498 285 25
630×1250 750 1250 750 628 350 32
400×1500 510 1500 510 398 235 37
500×1500 615 1500 615 498 285 41
630×1500 750 1500 750 628 350 46
630×1750 750 1750 750 628 350 51


QLV-180

Nominal size
B1
mm
H1
mm
T1
mm
ØD
mm
A
mm
m
kg
160×500 240 500 235 158 115 6
200×500 280 500 275 198 135 7
250×500 330 500 325 248 160 8
160×600 240 600 235 158 115 10
200×600 280 600 275 198 135 7
250×600 330 600 325 248 160 8
315×600 395 600 390 313 193 9
160×800 240 800 235 158 115 11
200×800 280 800 275 198 135 8
250×800 330 800 325 248 160 9
315×800 395 800 390 313 193 11
400×800 480 800 475 398 235 13
160×1000 240 1000 235 158 115 12
200×1000 280 1000 275 198 135 14
250×1000 330 1000 325 248 160 16
315×1000 395 1000 390 313 193 20
400×1000 480 1000 475 398 235 17
500×1000 580 1000 575 498 285 20
315×1250 395 1250 390 313 193 25
400×1250 480 1250 475 398 235 28
500×1250 580 1250 575 498 285 25
630×1250 710 1250 705 628 350 31
400×1500 480 1500 475 398 235 35
500×1500 580 1500 575 498 285 39
630×1500 710 1500 705 628 350 44
630×1750 710 1750 705 628 350 49


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • With displacement ventilation and air discharge near the floor, extract air devices should be installed in the upper part of a room, above the occupied zone.
  • If necessary, carry out volume flow rate balancing with the damper blade

Principal dimensions

B₁ [mm]

Width of diffuser face

B₄ [mm]

Width of a rectangular spigot

ØD [mm]

Outer diameter of the spigot

ØD₁ [mm]

Casing diameter

H₁ [mm]

Height of diffuser face

T₁ [mm]

Casing depth

T₄ [mm]

Depth of a rectangular spigot

m [kg]

Weight

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

v0 [m/s]

Theoretical airflow velocity across the diffuser area, at a distance of 0 m from the diffuser face

Lnz [m]

Near zone of the displacement flow diffuser, where the comfort criteria may not be achieved

The near zone is at least 0.5 m, independent of the airflow velocity

At distance Lnz the airflow velocity is 0.2 m/s max., measured 0.1 m above the floor

Δtz [K]

Supply air to room air temperature difference, i.e. supply air temperature minus room temperature

Δpt [Pa]

Total differential pressure

Aeff [m²]

Effective air discharge area


All sound power levels are based on 1 pW.

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