REA & REV Centrifugal Roof Fans with External Rotor Motor
Centrifugal roof fans designed for efficient ventilation.
Product Overview
The REA and REV series are centrifugal roof fans featuring an external rotor motor, designed for direct or ducted ventilation in a wide range of civil, commercial, and industrial applications. These fans are characterized by their compact design and ease of installation.
Discharge Types:
- REA: Horizontal discharge
- REV: Vertical discharge
Compliance:
Conforms to ErP Directive 125/2009/CE and EU Regulation 1253/2014 [✅]
Operating Temperature:
Suitable for exhausting clean air with temperatures ranging from -10°C to +60°C.
Construction:
- Base frame: Galvanized steel sheet.
- Protection guard: Drawn steel rod, protected against atmospheric agents.
- Impeller: Backward-curved wheel made of PA plastic, offering high aerodynamic efficiency and low noise levels.
- Upper cover: Aluminum (REA models).
- Outer deflector: ABS (REV models).
Motor:
External rotor motor, available in three-phase or single-phase. Protection rating is IP44 for models up to Size 254, and IP54 for larger models.
Available Accessories:
- TS: Backdraught gravity shutter
- GR: Silencer
- CB: Counterbase for wall mounting
- BA: Support base for corrugated roof coverings
- Speed regulators and inverters
- PB: Support base/Silenced reduction (not available for size 200)
- CCr: Flat protection guard
Versions:
REA EC: Versions equipped with high-efficiency electronically controlled motors.
Performance Data
Air performances are measured in accordance with EN ISO 5801 / AMCA 210 standard with standard air density (1.2 kg/m³). Sound power level is obtained according to EN ISO 3746. Installation Type: C. Power supply options: 230V/1Ph/50Hz or 400V/3Ph/50Hz.
Key for Performance Tables:
- U: Power Supply (Single/Three-phase)
- P: Motor Poles (RPM: 2p=3000, 4p=1500, 6p=1000, 8p=750)
- Pm (kW): Motor power rating
- In (A): Full load current
- IP/CL: Motor protection grade/Insulation class
- Mot. (Gr): Motor size
- Lp/Lw (dBA): Sound pressure and volume levels
- Ps (Pa): Static pressure
- Q (m³/h): Airflow volume
REA 200 Performance
| Code | Type | Model | U | P | Pm (kW) | In (A) | IP/CL | dB(A) | Ps (Pa) | Q (m³/h) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lw | Lp | ||||||||||
| 1RE2042 | REA | 202 M | 2 | 0.06 | 0.23 | 44/B | 68 | 44 | 200 | 50-500 | |
Graph showing Static Pressure (Ps) in Pascals (Pa) versus Airflow Volume (Q) in cubic meters per hour (m³/h) for the REA 200 model.
REA - REV 250 Performance
| Code | Type | Model | U | P | Pm (kW) | In (A) | IP/CL | dB(A) | Ps (Pa) | Q (m³/h) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lw | Lp | ||||||||||
| 1RE2545 | REA | 252 M | 2 | 0.20 | 0.68 | 44/B | 77 | 53 | 480 | 0-1200 | |
| 1RE2544 | REA | 254 M | 4 | 0.09 | 0.39 | 44/B | 66 | 43 | 320 | 0-1200 | |
| 1RV2550 | REV | 252 M | 2 | 0.20 | 0.90 | 44/B | 77 | 53 | 480 | 0-1200 | |
| 1RV2560 | REV | 254 M | 4 | 0.09 | 0.39 | 44/B | 66 | 43 | 320 | 0-1200 | |
Graphs showing Static Pressure (Ps) in Pascals (Pa) versus Airflow Volume (Q) in cubic meters per hour (m³/h) for REA 252 M, REA 254 M, REV 252 M, and REV 254 M models.
REA - REV 310 Performance
| Code | Type | Model | U | P | Pm (kW) | In (A) | IP/CL | dB(A) | Ps (Pa) | Q (m³/h) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lw | Lp | ||||||||||
| 1RE0301 | REA | 314 M | 4 | 0.22 | 1.10 | 54/F | 61 | 37.5 | 260 | 0-2700 | |
| 1RE0300 | REA | 314 T | 4 | 0.22 | 0.50 | 54/F | 61 | 37.5 | 260 | 0-2700 | |
| 1RV3151 | REV | 314 M | 4 | 0.22 | 1.10 | 44/B | 61 | 37.5 | 260 | 0-2700 | |
| 1RV3156 | REV | 314 T | 4 | 0.21 | 0.50 | 54/F | 61 | 37.5 | 260 | 0-2700 | |
Graphs showing Static Pressure (Ps) in Pascals (Pa) versus Airflow Volume (Q) in cubic meters per hour (m³/h) for REA 314 M, REA 314 T, REV 314 M, and REV 314 T models.
REA - REV 350 Performance
| Code | Type | Model | U | P | Pm (kW) | In (A) | IP/CL | dB(A) | Ps (Pa) | Q (m³/h) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lw | Lp | ||||||||||
| 1RE0351 | REA | 354 M | 4 | 0.58 | 2.60 | 54/F | 67 | 43.5 | 400 | 0-5900 | |
| 1RE0350 | REA | 354 T | 4 | 0.33 | 0.68 | 54/F | 63 | 39.5 | 300 | 0-5900 | |
| 1RV3551 | REV | 354 M | 4 | 0.58 | 2.60 | 54/F | 67 | 43.5 | 400 | 0-5900 | |
| 1RV3556 | REV | 354 T | 4 | 0.33 | 0.70 | 54/F | 63 | 39.5 | 300 | 0-5900 | |
Graphs showing Static Pressure (Ps) in Pascals (Pa) versus Airflow Volume (Q) in cubic meters per hour (m³/h) for REA 354 M, REA 354 T, REV 354 M, and REV 354 T models.
REA - REV 400 Performance
| Code | Type | Model | U | P | Pm (kW) | In (A) | IP/CL | dB(A) | Ps (Pa) | Q (m³/h) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lw | Lp | ||||||||||
| 1RE0400 | REA | 404 T | 4 | 0.54 | 1.20 | 54/F | 67 | 43.5 | 400 | 0-6000 | |
| 1RV4056 | REV | 404 T | 4 | 0.54 | 1.20 | 54/F | 67 | 43.5 | 400 | 0-6000 | |
Graphs showing Static Pressure (Ps) in Pascals (Pa) versus Airflow Volume (Q) in cubic meters per hour (m³/h) for REA 404 T and REV 404 T models.
Dimensions
Dimensions are provided in millimeters (mm). Indicative weights are also listed.
REA Dimensions
Technical drawing illustrating the external dimensions of REA fans, labeled ØA, B, C, D, E, F, G, ØH.
| TIPO | TYPE | ØA | B | C | D | E | F | G | ØH | Kg |
|---|---|---|---|---|---|---|---|---|---|
| REA 200 | 395 | 180 | 23 | 300 | 265 | - | 220 | 125 | 6 |
| REA 250 | 490 | 220 | 38 | 400 | 360 | - | 257 | 178 | 10 |
| REA 310 | 555 | 310 | 38 | 400 | 360 | - | 307 | 220 | 14 |
| REA 350 | 690 | 335 | 38 | 500 | 450 | - | 380 | 270 | 25 |
| REA 400 | 810 | 360 | 38 | 650 | 600 | 530 | 471 | 296 | 40 |
REV Dimensions
Technical drawing illustrating the external dimensions of REV fans, labeled ØA, B, C, D, E, F, G, ØH.
| TIPO | TYPE | ØA | B | C | D | E | F | G | ØH | Kg |
|---|---|---|---|---|---|---|---|---|---|
| REV 250 | 650 | 290 | 38 | 400 | 360 | - | 257 | 178 | 10 |
| REV 310 | 650 | 290 | 38 | 400 | 360 | - | 307 | 220 | 15 |
| REV 350 | 800 | 340 | 38 | 500 | 450 | - | 380 | 270 | 32 |
| REV 400 | 980 | 400 | 38 | 650 | 600 | 530 | 471 | 296 | 45 |
Accessories
A range of accessories are available to enhance the functionality and installation of REA and REV fans.
GR Silencers
Silencers with a central pod designed to reduce fan noise. Constructed with mineral wool sound-absorbing material and a galvanized steel frame. Note: Using a silencer with the TS shutter requires the version with a lowered pod.
Noise Attenuation (dB per Octave Band):
| Type | 63 Hz | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz | 8000 Hz |
|---|---|---|---|---|---|---|---|---|
| GR 25 | 2 | 4 | 6 | 10 | 16 | 18 | 15 | 11 |
| GR 31 | 2 | 4 | 6 | 10 | 16 | 18 | 15 | 11 |
| GR 35 | 3 | 5 | 9 | 11 | 19 | 20 | 18 | 14 |
| GR 40 | 3 | 4 | 8 | 9 | 18 | 15 | 10 | 6 |
| GR 45 | 3 | 4 | 8 | 9 | 18 | 15 | 10 | 6 |
| GR 50 | 4 | 5 | 11 | 15 | 16 | 12 | 9 | 5 |
| GR 56 | 4 | 5 | 11 | 15 | 16 | 12 | 9 | 5 |
| GR 63 | 3 | 4 | 5 | 8 | 14 | 9 | 7 | 3 |
| GR 75 | 3 | 4 | 5 | 8 | 14 | 9 | 7 | 3 |
| GR 80 | 3 | 4 | 5 | 8 | 14 | 9 | 7 | 3 |
Diagram showing the dimensions of GR silencers.
| Code (I) | Code (II) | Tipo | A | B | B (lowered) | C | D | E | F | G | ØH | Kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1SI0310 | 1SI0456 | GR 25-31 | 750 | 650 | 450 | 390 | 360 | 95 | 100 | 50 | M8 | 28 |
| 1SI0350 | 1SI0457 | GR 35 | 750 | 650 | 400 | 490 | 450 | 120 | 150 | 50 | M8 | 37 |
| 1SI0400 | 1SI0454 | GR 40 | 750 | 650 | 350 | 640 | 600 | 145 | 250 | 50 | M8 | 42 |
| 1SI0400 | 1SI0454 | GR 45 | 750 | 650 | 350 | 640 | 600 | 145 | 250 | 50 | M8 | 42 |
(I) Standard version | (II) Version with lowered pod
TS Gravity Shutters
These shutters prevent unnecessary heat loss and have negligible pressure drop. The shutter flaps open due to the air depression generated by the fan and close by gravity when the fan stops. Constructed from galvanized steel sheet. If used with a silencer, the silencer with a lowered pod must be used.
Diagram showing the dimensions and structure of the TS gravity shutter.
| Code | Tipo | Type | A | B | B1 | C | ØD | ØE | ØF | ØG | Kg |
|---|---|---|---|---|---|---|---|---|---|---|
| 1TS2010 | TS 20 | 240 | 220 | - | 110 | 161 | 10 | 177 | 185 | 1.5 |
| 1TS3010 | TS 25/31 | 330 | 307 | 257 | 158 | 258 | 10 | 285 | 306 | 2.5 |
| 1TS3510 (I) | TS 35 | 465 | 380 | - | 222 | 402 | 10 | 438 | 464 | 5.0 |
| 1TS4010 | TS 40/45 | 500 | 471 | - | 222 | 402 | 10 | 438 | 464 | 6.0 |
(I) Not compatible with silencer 1SI0350 or others.
CB Counterbases to be Walled Up
The counterbase ensures effective anchorage to the duct shaft via masonry fixing of four specially designed metal strips. Manufactured from robust steel sheet with provisions for fixing to the fan base.
Diagram showing the dimensions of the CB counterbase, including anchor points.
| Code | Tipo | Type | A | B | C | ØD | Kg |
|---|---|---|---|---|---|---|
| 1CB2000 | CB 20 | 290 | 265 | 30 | M8X30 | 1.5 |
| 1CB3000 | CB 25 | 390 | 360 | 30 | M8X30 | 2.5 |
| 1CB3000 | CB 31 | 390 | 360 | 30 | M8X30 | 2.5 |
| 1CB3500 | CB 35 | 490 | 450 | 30 | M8X30 | 2.8 |
| 1CB4000 | CB 40 | 630 | 600 | 30 | M8X30 | 3.2 |
BA Support Base for Roof Fans
The BA support bases and RD reduction pieces are suitable for installing roof fans on corrugated roof coverings. They prevent detrimental water stagnation around the fan and avoid costly carpentry work. The BA base is suitable for fans with a base of 930x930 mm or larger. With the RD reduction, the base can be used for fans with base dimensions down to 500x500 mm. The RD reduction is a single element that can be cut to fit the exact fan dimension.
Versions:
- BA 10x177 (Cod. 5PL1008): Compatible with "EURO" type roof coverings with a pitch of 177 mm, height of 51 mm, and a slope of 10%.
- BA 3x177 (Cod. 5PL1015): Compatible with "EURO" type roof coverings with a pitch of 177 mm, height of 51 mm, and a sheet curvature radius of 3 meters.
- BA 10x146 (Cod. 5PL1009): Compatible with "INTERNATIONAL" type roof coverings with a pitch of 146 mm, height of 48 mm, and a slope of 10%.
- Reduction RD (Cod. 5PL1010).
Construction: Made from polyester resins reinforced with stratified fiberglass. Finished in RAL 9002 (light grey). The external surface is treated to resist atmospheric agents over time.
Installation: Correct installation involves overlapping the downstream covering slab and under-exposure upstream. A side overlap of at least one and a quarter waves per side is also required.
Diagrams illustrating the BA support bases (BA 10x177, BA 3x177, BA 10x146) and the RD reduction piece, showing their dimensions and compatibility with different roof covering types.
PB Support Base/Silenced Reduction (Pulling Box)
The PB silenced support base (pulling box) is suitable for installing roof fans on flat coverings. It includes acoustic insulation on the fan's inlet side to reduce noise. Constructed from galvanized steel sheet with an internally lined acoustic material.
Diagram showing the dimensions of the PB silenced support base.
| Code | Tipo | Type | A | B | C | D |
|---|---|---|---|---|---|
| 5PB3100 | 25/31 | 380 | 360 | 520 | 780 |
| 5PB3500 | 35 | 480 | 450 | 620 | 880 |
| 5PB4000 | 40/45 | 630 | 600 | 770 | 1030 |
CCr Inlet Protection Guard
These guards prevent accidental contact with the fan's moving parts. Manufactured from steel rod according to UNI 12499 standard and protected against atmospheric agents.
Diagram showing the dimensions of the CCr inlet protection guard.
| Code | Tipo | Type | ØA | Kg |
|---|---|---|---|
| 5RE9027 | CCr 25 | 305 | 0.31 |
| 5RE9032 | CCr 31 | 355 | 0.49 |
| 5RE0055 | CCr 35 | 525 | 0.50 |
| 5RE0056 | CCr 40 | 665 | 1.00 |
