Application
Special characteristics
Nominal length
Variants
Heat exchanger
Nozzle variants
Construction
Attachments
Useful additions
Construction features
Materials and surfaces
Standards and guidelines
Maintenance
Functional description
Under floor induction units provide centrally conditioned primary air (fresh air) to the room and use heat exchangers for additional cooling and/or heating.
The primary air is discharged through nozzles (four variants are available).
As a result of this, secondary air (room air) is induced and passes through the heat exchanger.
Primary and secondary air mix and are then supplied to the room as an inducing displacement flow.
Nominal length | 900, 1050, 1200, 1350, 1500 mm |
Total length | 1100 – 1849 mm |
Height | 191 mm |
Width | 403 mm |
Primary air volume flow rate | 4 – 40 l/s or 14 – 144 m³/h |
Cooling capacity | Up to 1030 W |
Heating capacity | Up to 1225 W |
Max. operating pressure, water side | 6 bar |
Max. operating temperature, water side | 75 °C |
The quick sizing table contains operating points for defined reference units. For other operating points you may use the Easy Product Finder design software.
Quick sizing
900 | M | 4 | 14 | 52 | 52 | <20 | <20 | 229 | 181 | 1.4 | 3.1 | 244 | 4.2 | 0.24 |
900 | M | 6 | 22 | 117 | 117 | <20 | <20 | 303 | 230 | 1.8 | 3.1 | 311 | 5.4 | 0.24 |
900 | M | 9 | 32 | 264 | 264 | 27 | 23 | 400 | 291 | 2.3 | 3.1 | 395 | 6.8 | 0.24 |
900 | G | 8 | 29 | 58 | 58 | <20 | <20 | 324 | 228 | 1.8 | 3.1 | 308 | 5.3 | 0.24 |
900 | G | 12 | 43 | 130 | 129 | 23 | <20 | 435 | 290 | 2.3 | 3.1 | 394 | 6.8 | 0.24 |
900 | G | 17 | 61 | 262 | 260 | 33 | 28 | 560 | 355 | 2.8 | 3.1 | 483 | 8.3 | 0.24 |
900 | U | 15 | 54 | 64 | 63 | 22 | <20 | 457 | 276 | 2.2 | 3.1 | 374 | 6.4 | 0.24 |
900 | U | 20 | 72 | 114 | 111 | 30 | 23 | 570 | 328 | 2.6 | 3.1 | 446 | 7.7 | 0.24 |
900 | U | 30 | 108 | 256 | 250 | 42 | 35 | 778 | 417 | 3.3 | 3.1 | 569 | 9.8 | 0.24 |
900 | 2U | 23 | 83 | 43 | 40 | 34 | 20 | 540 | 263 | 2.1 | 3.1 | 310 | 5.3 | 0.24 |
900 | 2U | 32 | 115 | 84 | 79 | 43 | 29 | 708 | 322 | 2.5 | 3.1 | 382 | 6.6 | 0.24 |
900 | 2U | 41 | 148 | 138 | 126 | 50 | 36 | 867 | 373 | 2.9 | 3.1 | 445 | 7.7 | 0.24 |
1050 | M | 4 | 14 | 38 | 38 | <20 | <20 | 238 | 190 | 1.5 | 3.5 | 256 | 4.4 | 0.26 |
1050 | M | 8 | 29 | 151 | 151 | 20 | <20 | 381 | 285 | 2.2 | 3.5 | 387 | 6.6 | 0.26 |
1050 | M | 11 | 40 | 285 | 285 | 29 | 25 | 474 | 341 | 2.7 | 3.5 | 468 | 8.0 | 0.26 |
1050 | G | 10 | 36 | 66 | 65 | <20 | <20 | 393 | 272 | 2.1 | 3.5 | 375 | 6.4 | 0.26 |
1050 | G | 15 | 54 | 148 | 146 | 27 | 21 | 526 | 345 | 2.7 | 3.5 | 466 | 8.0 | 0.26 |
1050 | G | 20 | 72 | 263 | 260 | 35 | 30 | 646 | 405 | 3.2 | 3.5 | 533 | 9.5 | 0.26 |
1050 | U | 15 | 54 | 47 | 46 | 20 | <20 | 468 | 287 | 2.2 | 3.5 | 391 | 6.7 | 0.26 |
1050 | U | 25 | 90 | 131 | 126 | 35 | 27 | 691 | 389 | 3.0 | 3.5 | 513 | 9.0 | 0.26 |
1050 | U | 35 | 126 | 256 | 248 | 44 | 36 | 893 | 471 | 3.7 | 3.5 | 647 | 11.1 | 0.26 |
1050 | 2U | 27 | 97 | 45 | 40 | 41 | 23 | 627 | 302 | 2.4 | 3.5 | 357 | 6.1 | 0.26 |
1050 | 2U | 37 | 133 | 85 | 76 | 50 | 32 | 811 | 364 | 2.8 | 3.5 | 435 | 7.5 | 0.26 |
1050 | 2U | 47 | 169 | 137 | 122 | 57 | 39 | 985 | 419 | 3.3 | 3.5 | 503 | 8.6 | 0.26 |
1200 | M | 5 | 18 | 45 | 45 | <20 | <20 | 286 | 226 | 1.8 | 3.8 | 306 | 5.3 | 0.29 |
1200 | M | 9 | 32 | 145 | 144 | 21 | <20 | 425 | 317 | 2.5 | 3.8 | 431 | 7.4 | 0.29 |
1200 | M | 12 | 43 | 257 | 256 | 29 | 25 | 516 | 372 | 2.9 | 3.8 | 506 | 8.7 | 0.29 |
1200 | G | 10 | 36 | 50 | 49 | <20 | <20 | 403 | 282 | 2.2 | 3.8 | 383 | 6.6 | 0.29 |
1200 | G | 15 | 54 | 113 | 111 | 24 | <20 | 538 | 357 | 2.8 | 3.8 | 486 | 8.4 | 0.29 |
1200 | G | 24 | 86 | 288 | 284 | 38 | 32 | 752 | 463 | 3.6 | 3.8 | 634 | 10.9 | 0.29 |
1200 | U | 16 | 58 | 41 | 40 | 21 | <20 | 501 | 308 | 2.4 | 3.8 | 419 | 7.2 | 0.29 |
1200 | U | 24 | 86 | 93 | 89 | 32 | 23 | 682 | 392 | 3.1 | 3.8 | 535 | 9.2 | 0.29 |
1200 | U | 36 | 130 | 208 | 200 | 44 | 35 | 927 | 493 | 3.9 | 3.8 | 676 | 11.6 | 0.29 |
1200 | 2U | 31 | 112 | 48 | 41 | 49 | 27 | 713 | 339 | 2.7 | 3.8 | 403 | 6.9 | 0.29 |
1200 | 2U | 39 | 140 | 76 | 65 | 55 | 34 | 858 | 388 | 3.0 | 3.8 | 464 | 8.0 | 0.29 |
1200 | 2U | 47 | 169 | 110 | 95 | 61 | 39 | 999 | 432 | 3.4 | 3.8 | 519 | 8.9 | 0.29 |
1350 | M | 5 | 18 | 35 | 35 | <20 | <20 | 295 | 234 | 1.8 | 4.2 | 317 | 5.5 | 0.31 |
1350 | M | 10 | 36 | 140 | 139 | 21 | <20 | 468 | 348 | 2.7 | 4.2 | 473 | 8.1 | 0.31 |
1350 | M | 13 | 47 | 237 | 236 | 29 | 24 | 558 | 401 | 3.1 | 4.2 | 547 | 9.4 | 0.31 |
1350 | G | 10 | 36 | 39 | 39 | <20 | <20 | 412 | 292 | 2.3 | 4.2 | 396 | 6.8 | 0.31 |
1350 | G | 15 | 54 | 89 | 87 | 22 | <20 | 550 | 369 | 2.9 | 4.2 | 502 | 8.6 | 0.31 |
1350 | G | 25 | 90 | 246 | 242 | 37 | 30 | 789 | 487 | 3.8 | 4.2 | 668 | 11.5 | 0.31 |
1350 | U | 17 | 61 | 38 | 36 | 22 | <20 | 535 | 330 | 2.6 | 4.2 | 448 | 7.7 | 0.31 |
1350 | U | 25 | 90 | 80 | 76 | 33 | 23 | 715 | 413 | 3.2 | 4.2 | 564 | 9.7 | 0.31 |
1350 | U | 40 | 144 | 205 | 194 | 46 | 36 | 1018 | 536 | 4.2 | 4.2 | 736 | 12.7 | 0.31 |
1350 | 2U | 35 | 126 | 51 | 42 | 57 | 32 | 797 | 375 | 2.9 | 4.2 | 448 | 7.7 | 0.31 |
1350 | 2U | 41 | 148 | 70 | 58 | 61 | 36 | 905 | 411 | 3.2 | 4.2 | 493 | 8.5 | 0.31 |
1350 | 2U | 47 | 169 | 91 | 76 | 65 | 40 | 1011 | 444 | 3.5 | 4.2 | 535 | 9.2 | 0.31 |
1500 | M | 6 | 22 | 41 | 40 | <20 | <20 | 341 | 269 | 2.1 | 4.5 | 365 | 6.3 | 0.33 |
1500 | M | 11 | 40 | 137 | 136 | 21 | <20 | 510 | 378 | 3.0 | 4.5 | 515 | 8.9 | 0.33 |
1500 | M | 15 | 54 | 254 | 252 | 30 | 26 | 626 | 445 | 3.5 | 4.5 | 609 | 10.5 | 0.33 |
1500 | G | 14 | 50 | 63 | 61 | <20 | <20 | 534 | 365 | 2.9 | 4.5 | 497 | 8.5 | 0.33 |
1500 | G | 22 | 79 | 154 | 151 | 31 | 25 | 733 | 468 | 3.7 | 4.5 | 640 | 11.0 | 0.33 |
1500 | G | 28 | 101 | 250 | 244 | 38 | 32 | 868 | 531 | 4.1 | 4.5 | 729 | 12.5 | 0.33 |
1500 | U | 20 | 72 | 42 | 40 | 27 | <20 | 614 | 372 | 2.9 | 4.5 | 507 | 8.7 | 0.33 |
1500 | U | 33 | 119 | 115 | 107 | 41 | 29 | 893 | 495 | 3.9 | 4.5 | 678 | 11.7 | 0.33 |
1500 | U | 40 | 144 | 169 | 158 | 46 | 35 | 1031 | 549 | 4.3 | 4.5 | 754 | 13 | 0.33 |
1500 | 2U | 39 | 140 | 54 | 44 | 65 | 36 | 880 | 409 | 3.2 | 4.5 | 491 | 8.4 | 0.33 |
1500 | 2U | 43 | 155 | 66 | 53 | 68 | 39 | 951 | 433 | 3.4 | 4.5 | 520 | 9.0 | 0.33 |
1500 | 2U | 47 | 169 | 78 | 63 | 70 | 41 | 1022 | 455 | 3.6 | 4.5 | 549 | 9.4 | 0.33 |
① Nozzle variant ② Air-regenerated noise
Reference values
tR | 26 °C | 22 °C |
tAN | 24. °C | 22 °C |
tWV | 16 °C | 50 °C |
VW | 110 l/h | 50 l/h |
Δtpr = tpr – tR | –10 K | – |
ΔtRWV = tWV – tR | –10 K | –28 K |
Under floor induction units of Type BID, with one-way air discharge and high thermal output.
For installation in false floors. The units consist of a casing with primary air plenum, non-combustible nozzles, and a horizontal heat exchanger.
Four nozzle variants to optimise induction based on demand.
Special characteristics
Materials and surfaces
Construction
Technical data
This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.
BID–2–M–R–E/1350×1050×98
Heat exchanger | 2-pipe |
Nozzle variant | Medium |
Casing arrangement | Right side |
Unit variant | Single unit |
Total length (diffuser face) × nominal length | 1350 × 1050 mm |
Spigot diameter | Ø98 mm |
Water connections | Ø12 mm pipe, plain tails |
Surface | Galvanised steel |
Surface of heat exchanger | Untreated |
Valves and actuators | Without |
BID–4–U–L–E/1350×1050×123/A00/P1 RAL 9005/G3/VS
Heat exchanger | 4-pipe |
Nozzle variant | Extra large |
Casing arrangement | Left side |
Unit variant | Single unit |
Total length (diffuser face) × nominal length | 1350 × 1050 mm |
Spigot diameter | Ø123 mm |
Water connections | G½" external thread |
Surface | P1 RAL 9005, black |
Surface of heat exchanger | RAL 9005, black |
Valves and actuators | With |
Dimensions [mm]
1100 – 1249 | 900 | 895 | 875 |
1250 – 1399 | 1050 | 1045 | 1025 |
1400 – 1549 | 1200 | 1195 | 1175 |
1550 – 1699 | 1350 | 1345 | 1325 |
1700 – 1849 | 1500 | 1495 | 1475 |
Weights
L₁ | mm | 1100 | 1249 | 1250 | 1399 | 1400 | 1549 | 1550 | 1699 | 1700 | 1849 |
Unit | kg/piece | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 |
Contained water (max.) | kg | 1.8 | 1.8 | 2.1 | 2.1 | 2.4 | 2.4 | 2.7 | 2.7 | 3 | 3 |
min L₁ = LN + 200 mm
Installation and commissioning
LN [mm]
Nominal length
LWA [dB(A)]
Sound power level
tPr [°C]
Primary air temperature
tWV [C°]
Water flow temperature – cooling/heating
tR [C°]
Room temperature
tR [C°]
Room temperature
tAN [C°]
Secondary air intake temperature
QPr [W]
Thermal output – primary air
Qtot [W]
Thermal output – total
QW [W]
Thermal output – water side, cooling/heating
VPr [l/s]
Primary air volume flow rate
VPr [m³/h]
Primary air volume flow rate
VW [l/h]
Water flow rate – cooling/heating
V [l/h]
Volume flow rate
∆tW [K]
Temperature difference – water
∆pW [kPa]
Pressure drop, water side
∆pt [Pa]
Total pressure drop, air side
∆tPr = tPr - tR [K]
Difference between primary air temperature and room temperature
∆tRWV = tWV - tR [K]
Difference between water flow temperature and room temperature
∆tWm-Ref [K]
Difference between mean water temperature and reference temperature
LN [mm]
Nominal length
Inducing displacement flow
The supply air is discharged near the external wall and with a medium velocity between 1.0 and 1.5 m/s. Due to the induction effect the supply air velocity is rapidly reduced such that, in cooling mode, the supply air displaces the room air over 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.
Heat exchanger
The maximum water-side operating pressure for all heat exchangers is 6 bar.
The maximum water flow temperature (heating circuit) for all heat exchangers is 75 °C; if flexible hoses are used, the water flow temperature should not exceed 55 °C. Units for other pressures and temperatures are available on request.
The water flow temperature (cooling circuit) should be at least 16 °C such that it does not permanently fall below the dew point. For units with a condensate drip tray the water flow temperature may be reduced to 15 °C.
Heat exchanger as 2-pipe system
Air-water systems with a 2-pipe heat exchanger may be used for either heating or cooling. In changeover mode it is possible to use all units within a water circuit exclusively for cooling in summer and exclusively for heating in winter.
Heat exchanger as 4-pipe system
Air-water systems with a 4-pipe heat exchanger may be used for both heating and cooling. Depending on the season, i.e. especially in spring and autumn, it may be possible that an office has to be heated in the morning and cooled in the afternoon.
Share page
Recommend this page
Recommend this page by sending a link by mail.
Share page
Thank you for your recommendation!
Your recommendation has been sent and should arrive shortly.
Contact
We are here for you
Please specify your message and type of request.
Tel.: +32(0)2 522 07 80 | E-mail: info@trox.be
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.: +32(0)2 522 07 80 | E-mail: info@trox.be
Contact
We are here for you
Please specify your message and type of request.
Tel.: +32(0)2 522 07 80 | E-mail: info@trox.be
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.: +32(0)2 522 07 80 | E-mail: info@trox.be