Fan heater - LEO S3 | Flowair

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Fan heater, three speed FLOWAIR axial fan, EPP casing, rotating mounting bracket, two row heat exchanger, 3-25 kW heating capacity, air flow 1000/1400/1800 m³/h, fan power 70/90/130 W, weight 10.8 kg, 3 year WARRANTY
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Arvydas Palivonas

LT, RU, EN
+370 601 74426

Sales representative for Vilnius, Ukmergė, Utena, Kaišiadorys and Varėna regions Get Offer

Andrius Lekarevičius

LT, RU, EN
+370 606 11865

Sales representative for Kaunas, Panevėžys, Šiauliai, Telšiai, Klaipėda, Tauragė, Marijampolė and Alytus districts Get Offer
Click on the Model for technical data, dimensions, accessories
LEO - three speed FLOWAIR axial fan, EPP casing, rotating mounting bracket
LEO S1 One row heat exchanger, 1-10 kW heating capacity, air flow 1500/1900/2300 m³/h, fan power 70/90/120 W, weight 9.5 kg, 3 year WARRANTY
LEO S1
One row heat exchanger, 1-10 kW heating capacity, air flow 1500/1900/2300 m³/h, fan power 70/90/120 W, weight 9.5 kg, 3 year WARRANTY
LEO S2 Two row heat exchanger, 3-20 kW heating capacity, air flow 1250/1600/2000 m³/h, fan power 70/90/130 W, weight 10.4 kg, 3 year WARRANTY
LEO S2
Two row heat exchanger, 3-20 kW heating capacity, air flow 1250/1600/2000 m³/h, fan power 70/90/130 W, weight 10.4 kg, 3 year WARRANTY
LEO S3 Two row heat exchanger, 3-25 kW heating capacity, air flow 1000/1400/1800 m³/h, fan power 70/90/130 W, weight 10.8 kg, 3 year WARRANTY
LEO S3
Two row heat exchanger, 3-25 kW heating capacity, air flow 1000/1400/1800 m³/h, fan power 70/90/130 W, weight 10.8 kg, 3 year WARRANTY
LEO L1 One row heat exchanger, 2-25 kW heating capacity, air flow 1700/2800/4250 m³/h, fan power 120/240/330 W, weight 14.9 kg, 3 year WARRANTY
LEO L1
One row heat exchanger, 2-25 kW heating capacity, air flow 1700/2800/4250 m³/h, fan power 120/240/330 W, weight 14.9 kg, 3 year WARRANTY
LEO L2 Two row heat exchanger, 5-38 kW heating capacity, air flow 1400/2400/3800 m³/h, fan power 120/240/340 W, weight 16.2 kg, 3 year WARRANTY
LEO L2
Two row heat exchanger, 5-38 kW heating capacity, air flow 1400/2400/3800 m³/h, fan power 120/240/340 W, weight 16.2 kg, 3 year WARRANTY
LEO L3 Three row heat exchanger, 7-50 kW heating capacity, air flow 1200/2100/3400 m³/h, fan power 120/240/340 W, weight 17.8 kg, 3 year WARRANTY
LEO L3
Three row heat exchanger, 7-50 kW heating capacity, air flow 1200/2100/3400 m³/h, fan power 120/240/340 W, weight 17.8 kg, 3 year WARRANTY
LEO XL2 Two row heat exchanger, 10-72 kW heating capacity, air flow 2900/4600/5800 m³/h, fan power 270/370/520 W, weight 23.2 kg, 3 year WARRANTY
LEO XL2
Two row heat exchanger, 10-72 kW heating capacity, air flow 2900/4600/5800 m³/h, fan power 270/370/520 W, weight 23.2 kg, 3 year WARRANTY
LEO XL3 Three row heat exchanger, 14-92 kW heating capacity, air flow 2500/4100/5300 m³/h, fan power 270/370/550 W, weight 26.2 kg, 3 year WARRANTY
LEO XL3
Three row heat exchanger, 14-92 kW heating capacity, air flow 2500/4100/5300 m³/h, fan power 270/370/550 W, weight 26.2 kg, 3 year WARRANTY
Model: LEO S3
General data
Heating capacity at 90/70°C water and 0°C air temperature
kW
24,9
Heating capacity at 40/30°C water and 20°C air temperature
kW
3,1
Max. air flow
m³/h
1800
Fan data
Power supply
V/Hz
230/50
Fan type
3-speed AC
IP / Insulation class
54 / F
Fan data at 3rd (max) speed
Air flow
m³/h
1800
Air flow range (measured horizontaly at 0.5 m/s speed limit)
m
12,5
Air flow range (measured verticaly at 0.5 m/s speed limit)
m
4,9
Power consumption
W
130
Current consumption
A
0,6
Acoustic pressure level at a distance of 5 m from the unit, in the 1500 m³ room of medium capabillity of sound absorption
dB(A)
56,3
Acoustic power level according to EN ISO 3744:2011
dB(A)
71,4
Fan data at 2nd (mid) speed
Air flow
m³/h
1400
Air flow range (measured horizontaly at 0.5 m/s speed limit)
m
9,5
Air flow range (measured verticaly at 0.5 m/s speed limit)
m
3,9
Power consumption
W
90
Current consumption
A
0,4
Acoustic pressure level at a distance of 5 m from the unit, in the 1500 m³ room of medium capabillity of sound absorption
dB(A)
50,7
Acoustic power level according to EN ISO 3744:2011
dB(A)
65,8
Fan data at 1st (min) speed
Air flow
m³/h
1000
Air flow range (measured horizontaly at 0.5 m/s speed limit)
m
7,0
Air flow range (measured verticaly at 0.5 m/s speed limit)
m
2,9
Power consumption
W
70
Current consumption
A
0,3
Acoustic pressure level at a distance of 5 m from the unit, in the 1500 m³ room of medium capabillity of sound absorption
dB(A)
43,9
Acoustic power level according to EN ISO 3744:2011
dB(A)
59,0
Installation data
Max. operating temperature
°C
60
Max. heating water temperature
°C
120
Max. operating pressure
MPa
1,6
Hydraulic connection
Ø "
½
Other data
Heat exchanger
Copper with aluminum plates, two rows
Casing
EPP - expanded polypropylene
Color
Grey / graphite (ral 9007)
Dimensions
Width
mm
550
Depth
mm
345
Height
mm
480
Weight
kg
10,8
Weight of unit filled with water
kg
12,2

Dimensions

Model: LEO S3
Dimensions

Heating capacity tables

LEO S3 airflow on 3 speed = 1800 m³/h
Tp1
°C
PT
Qw
∆pw
Tp2
kW
l/h
kPa
°C
PT
Qw
∆pw
Tp2
kW
l/h
kPa
°C
PT
Qw
∆pw
Tp2
kW
l/h
kPa
°C
 
0
5
10
15
20
Tw1/Tw2 = 120/90°C
32,7
973
8,4
54,0
31,1
925
7,6
56,0
29,5
878
6,9
58,0
27,9
831
6,3
60,5
26,3
784
5,6
62,5
 
0
5
10
15
20
Tw1/Tw2 = 90/70°C
24,9
1098
11,1
41,0
23,3
1026
9,8
43,0
21,6
954
8,6
45,5
20,0
883
7,5
47,5
18,4
811
6,4
49,5
 
0
5
10
15
20
Tw1/Tw2 = 80/60°C
21,2
933
8,5
35,0
19,6
861
7,4
37,0
18,0
789
6,3
39,5
16,3
717
5,3
41,5
14,7
645
4,4
43,5
 
0
5
10
15
20
Tw1/Tw2 = 70/50°C
17,6
769
6,2
29,0
15,9
697
5,2
31,0
14,3
624
4,3
33,5
12,6
551
3,4
35,5
10,9
478
2,6
37,5
 
0
5
10
15
20
Tw1/Tw2 = 60/40°C
13,8
603
4,2
23,0
12,2
530
3,3
25,0
10,5
457
2,5
27,0
8,8
382
1,8
29,0
7,0
304
1,2
31,5
 
0
5
10
15
20
Tw1/Tw2 = 40/30°C
10,1
872
8,6
16,5
8,4
726
6,2
18,5
6,7
579
4,1
21,0
4,9
428
2,4
23,0
3,1
264
1,0
25,0
LEO S3 airflow on 2 speed = 1400 m³/h
Tp1
°C
PT
Qw
∆pw
Tp2
kW
l/h
kPa
°C
PT
Qw
∆pw
Tp2
kW
l/h
kPa
°C
PT
Qw
∆pw
Tp2
kW
l/h
kPa
°C
 
0
5
10
15
20
Tw1/Tw2 = 120/90°C
27,8
828
6,2
59,0
26,5
788
5,7
61,0
25,1
747
5,2
62,5
23,8
707
4,7
64,5
22,4
668
4,2
66,5
 
0
5
10
15
20
Tw1/Tw2 = 90/70°C
21,2
934
8,3
44,5
19,8
873
7,3
46,5
18,4
812
6,4
48,5
17,0
751
5,6
50,5
15,7
691
4,8
52,5
 
0
5
10
15
20
Tw1/Tw2 = 80/60°C
18,1
794
6,4
38,0
16,7
733
5,5
40,0
15,3
672
4,7
42,0
13,9
611
4,0
44,0
12,5
549
3,3
46,0
 
0
5
10
15
20
Tw1/Tw2 = 70/50°C
15,0
655
4,6
31,5
13,6
593
3,9
33,5
12,2
532
3,2
35,5
10,7
470
2,6
37,5
9,3
407
2,0
39,5
 
0
5
10
15
20
Tw1/Tw2 = 60/40°C
11,8
514
3,1
25,0
10,4
452
2,5
27,0
8,9
389
1,9
28,5
7,5
325
1,4
30,5
5,9
258
0,9
32,5
 
0
5
10
15
20
Tw1/Tw2 = 40/30°C
8,6
742
6,4
18,0
7,1
618
4,6
20,0
5,7
492
3,1
22,0
4,2
363
1,8
24,0
2,5
217
0,7
25,0
LEO S3 airflow on 1 speed = 1000 m³/h
Tp1
°C
PT
Qw
∆pw
Tp2
kW
l/h
kPa
°C
PT
Qw
∆pw
Tp2
kW
l/h
kPa
°C
PT
Qw
∆pw
Tp2
kW
l/h
kPa
°C
 
0
5
10
15
20
Tw1/Tw2 = 120/90°C
22,2
660
4,1
65,5
21,1
628
3,8
67,0
20,0
596
3,4
69,0
19,0
564
3,1
70,5
17,9
533
2,8
72,0
 
0
5
10
15
20
Tw1/Tw2 = 90/70°C
16,9
744
5,5
50,0
15,8
695
4,9
51,5
14,7
647
4,3
53,0
13,6
599
3,7
54,5
12,5
551
3,2
56,0
 
0
5
10
15
20
Tw1/Tw2 = 80/60°C
14,4
633
4,2
42,5
13,3
584
3,7
44,5
12,2
536
3,1
46,0
11,1
487
2,6
47,5
10,0
438
2,2
49,0
 
0
5
10
15
20
Tw1/Tw2 = 70/50°C
11,9
522
3,1
35,5
10,8
473
2,6
37,0
7,7
424
2,1
38,5
8,6
375
1,7
40,0
7,4
325
1,3
41,5
 
0
5
10
15
20
Tw1/Tw2 = 60/40°C
9,4
410
2,1
28,0
8,3
360
1,7
29,5
7,1
310
1,3
31,0
5,9
258
0,9
32,5
4,7
203
0,6
33,5
 
0
5
10
15
20
Tw1/Tw2 = 40/30°C
6,8
591
4,3
20,0
5,7
492
3,1
22,0
4,5
391
2,1
23,5
3,3
286
1,2
24,5
1,7
143
0,4
25,0
  • PT - heating capacity
  • Tp1 - air temperature at the unit inlet
  • Tp2 - air temperature at the unit outlet
  • Tw1 - heating medium temperature at the heat exchanger inlet
  • Tw2 - heating medium temperature at the heat exchanger outlet
  • Qw - heating medium flow rate in heat exchanger
  • Δpw - heating medium pressure drop in heat exchanger

If you want to calculate heating capacity at different parameters you can do this at manufacturer website.

Involving advanced techniques and solutions FLOWAIR, managed to decrease LEO FB fan heater production costs and weight, yet maintaining its quality. The new casing of LEO FB fan heaters is made of EPP (expanded polypropylene). Very elastic, light and solid material – resistant to bends and breaks under dynamic and static loads (e.g. if dropped down or under impact stress). This material is chemical-resistant, easy to clean, it absorbs heat, noise and vibrations. New upgraded mounting consoles (brackets) for new air heaters. Ability to turn both sides at 170° angle makes unit guiding towards required direction even easier. Due to good-looking casing and unique design LEO FB EPP fan heaters meet high aesthetic requirements and maintain the same functions for more favorable price.

LEO FB fan heaters are designed for heating of industrial, business and other large areas. LEO FB fan heaters include a fan and heat exchanger with connection for hot water. Hot water heats up heat exchanger, fan blows the heat evenly to premises (Fig. 1). Water may be supplied from: solid fuel boiler, gas fired water heater, pellet boiler, from municipal utilities or other heating equipment.

Fast and uniform heating of premises is the key advantage of fan heaters. Such type of heating is non inertial; feeling of heat comes immediately after unit start up. Programmable controller provides considerable energy saving, yet maintaining the heat comfort.

Choosing LEO FB fan air heaters with EPP casing brings the same high quality for better price!

Advantages of LEO FB fan heaters with EPP casing:

  • Heaters are developed and produced by company FLOWAIR. This company specializes in production of such type of heaters only and is the number one in a competitive Polish market!
  • Same quality and functionality for better price!
  • EPP casing. Solid and elastic EPP casing serves for lower weight of the unit. This material is chemical-resistant, easy to clean, it absorbs heat, noise and vibrations.
  • Heaters are made of highest quality parts: qualitative Czech LLOYD heat exchanger, unique German EBM fan.
  • Quality guarantee – European product with technical properties meeting the declared values, CE certified.
  • Modern and attractive design will be appreciated by any owner of premises.
  • Silent and economical fan performance. Plastic blades and German brushless motors of new generation ensure silent fan performance and minimum electricity consumption.
  • Low weight. LEO FB fan heaters feature low weight, therefore solid supporting structures are optional. Heater can be installed by one person.
  • Suitable for cooling and ventilation of premises. By applying cold water, the purpose of LEO FB may be changed from heating to cooling. Outdoor fresh air supply requires additional connection of recirculating chamber.
  • Extensive application: industrial buildings, workshops, car showrooms and washing sites, warehouses, pavilions, sport halls, exhibition and meeting rooms, supermarkets, churches, logistics centers and other facilities.
  • IP66 fan selection choice. These fans are dust and high humidity resistant, therefore are especially suitable in areas full of dust and humidity.
  • 5 YEAR WARRANTY.

Heat propagation of LEO fan heatersFig. 1: Heat propagation of LEO fan heaters

LEO water heaters
Manuals 1.6 MB
Declarations of conformity 1.1 MB
Brochures 10.9 MB
Catalogue 7.6 MB
AutoCAD drawings 3.5 MB
BIM objects 6.2 MB
TS controller for equipment with 3-speed fans
Manuals 187 KB
Declarations of conformity 211 KB
HMI programable controller for equipment with 3-speed fans
Manuals 811 KB
Declarations of conformity 1.5 MB
MODBUS protocol for connection to BMS 148 KB
T-box controller
Manuals 22.7 MB
Declarations of conformity 643 KB
MODBUS protocol for connection to BMS 1.9 MB
T-box Zone controller
Manuals 7.4 MB
Declarations of conformity 643 KB
MODBUS protocol for connection to BMS 1.7 MB
DRV V control module for 3-speed fan heaters
Manuals 348 KB
RX control signal splitter for equipment with 3-speed fans
Manuals 2 MB
Declarations of conformity 210 KB