Fan heater - LEO EX L2 | Flowair

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Fan heater, explosion-proof fan (IP44), powder painted steel casing, two row heat exchanger, 6-44 kW heating capacity, air flow 3600 m³/h, fan power 290 W, weight 34.5 kg, 2 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
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LEO EX - explosion-proof fan (IP44), powder painted steel casing
LEO EX L2 Two row heat exchanger, 6-44 kW heating capacity, air flow 3600 m³/h, fan power 290 W, weight 34.5 kg, 2 year WARRANTY
LEO EX L2
Two row heat exchanger, 6-44 kW heating capacity, air flow 3600 m³/h, fan power 290 W, weight 34.5 kg, 2 year WARRANTY
Weight [kg] LEO EX 25 LEO EX 45
Unit 33,1 34,5
Unit filled with water 34,2 36,6
Air stream range [m] LEO EX 25 LEO EX 45
L* 24 22

* range of isothermal stream, limit speed 0,5 m/s, air temperature 20°C

Water heater LEO EX dimensions

Power supply 3 x 400V/50Hz
Power consumption 290 W
Current consumption 0,88 A
IP 44
Insulation class F
Water connection 3/4"
Acoustic pressure level 51 dB(A)*
* Acoustic pressure level has been measured 5 m from the unit in a 1500 m3 space with a medium sound absorption coefficient.
Max. heating water temperature 130°C
Max. operating pressure 1,6 MPa
Technical data concerning supplied water with other parameters are available upon request at Sales Office.

Technical data

Model: LEO EX L2
General data
Heating capacity at 90/70°C water and 0°C air temperature
kW
43,6
Heating capacity at 40/30°C water and 20°C air temperature
kW
6,1
Air flow range (measured horizontaly at 0.5 m/s speed limit)
m
19
Air flow range (measured verticaly at 0.5 m/s speed limit)
m
6,7
Purpose
For explosive environments heating
Max. air flow
m³/h
3600
Fan data
Power supply
V/Hz
3x400/50
Max. power consumption
W
290
Max. current consumption
A
0,51
IP / Insulation class
44
Max. 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)
59,5
Max. acoustic power level according to EN ISO 3744:2011
dB(A)
75
Installation data
Max. operating temperature
°C
+40
Max. heating water temperature
°C
130
Max. operating pressure
MPa
1,6
Hydraulic connection
Ø "
¾
Other data
Casing
Powder coated steel
Color
RAL 7032
Dimensions
Width
mm
655
Depth
mm
345
Height
mm
630
Weight
kg
34,5
Weight of unit filled with water
kg
36,6

Dimensions

Model: LEO EX L2
Dimensions

Heating capacity tables

  LEO EX 25 LEO EX 45
  V = 4 300 m3/h V = 3 800 m3/h
Tp1 PT Qw Δpw Tp2   PT Qw Δpw Tp2
0C kW l/h kPa 0C   kW l/h kPa 0C
  Tw1/Tw2 = 90/70
0 25,5 1090 7,6 17,4   44,9 1882 12,5 34,8
5 23,7 1018 6,7 21,2   41,0 1738 11,0 36,5
10 22 946 5,9 25   37,3 1630 9,7 39,1
15 20,2 874 5,1 28,9   34,6 1476 8,3 41,9
20 18,4 805 4,3 32,7   31,8 1368 7,1 44,7
  Tw1/Tw2 = 80/60
0 21,7 946 5,9 15   37,2 1584 9,8 28,9
5 20,0 874 5,1 18,7   34,4 1476 8,4 31,7
10 18,2 802 4,4 22,5   31,5 1368 7,2 34,5
15 16,5 730 3,7 26,3   28,6 1224 6,1 37,2
20 14,8 658 3 30   25,7 1116 5 40
  Tw1/Tw2 = 70/50
0 18 802 4,4 12,4   31,2 1340 7,4 24,2
5 16,3 694 3,7 16,2   28,4 1225 6,3 27,0
10 14,5 622 3 20   25,5 1080 5,2 29,8
15 12,8 550 2,4 23,8   22,6 975 4,2 32,5
20 11,1 478 1,9 27,6   19,7 865 3,3 35,3
V
PT
Tp1
Tp2		 -
-
-
-		 airflow
heating capacity
air temperature at the unit inlet
air temperature at the unit outlet		 Tw1
Tw2
Qw
Δpw		 -
-
-
-		 water temperature at the admission to the heat exchanger
water temperature at the recoil (return) loop of the heat exchanger
heating water flow stream
water pressure drop in the exchanger

Heating capacity tables

LEO EX L2 airflow on 5 speed = 3600 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
57,3
1705
11,6
47,0
54,5
1624
10,6
49,5
51,8
1542
9,7
52,5
49,1
1462
8,8
55,0
46,4
1381
7,9
57,5
 
0
5
10
15
20
Tw1/Tw2 = 90/70°C
43,6
1923
15,4
36,0
40,8
1801
13,7
38,5
38,0
1678
12,0
41,0
35,2
1555
10,5
43,5
32,5
1433
9,0
46,0
 
0
5
10
15
20
Tw1/Tw2 = 80/60°C
37,4
1643
11,9
31,0
34,6
1520
10,4
33,5
31,8
1397
8,9
36,0
29,0
1273
7,5
38,5
26,2
1149
6,3
41,0
 
0
5
10
15
20
Tw1/Tw2 = 70/50°C
31,2
1364
8,8
25,5
28,4
1240
7,4
28,5
25,5
1116
6,1
31,0
22,7
992
5,0
33,5
19,8
866
3,9
36,0
 
0
5
10
15
20
Tw1/Tw2 = 60/40°C
24,9
1085
6,1
20,5
22,0
960
4,9
23,0
19,1
834
3,8
25,5
16,2
707
2,8
28,0
13,2
577
2,0
30,5
 
0
5
10
15
20
Tw1/Tw2 = 40/30°C
17,9
1555
12,3
15,0
15,1
1306
9,0
17,5
12,2
1054
6,2
20,0
9,2
798
3,8
22,5
6,1
532
1,8
25,0
LEO EX L2 airflow on 4 speed = 2800 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
49,0
1459
8,7
52,0
46,7
1390
8,0
54,0
44,4
1320
7,3
56,5
42,0
1251
6,6
59,0
39,7
1183
6,0
61,0
 
0
5
10
15
20
Tw1/Tw2 = 90/70°C
37,3
1645
11,6
39,5
34,9
1541
10,3
42,0
32,5
1436
9,1
44,0
30,2
1331
7,9
46,5
27,8
1227
6,8
49,0
 
0
5
10
15
20
Tw1/Tw2 = 80/60°C
32,0
1406
9,0
34,0
29,6
1301
7,8
36,0
27,2
1196
6,7
38,5
24,8
1090
5,7
41,0
22,4
984
4,7
43,0
 
0
5
10
15
20
Tw1/Tw2 = 70/50°C
26,7
1168
6,7
28,0
24,3
1062
5,6
30,5
21,9
956
4,7
33,0
19,4
849
3,8
35,5
17,0
742
3,0
37,5
 
0
5
10
15
20
Tw1/Tw2 = 60/40°C
21,3
929
4,6
22,5
18,9
822
3,7
25,0
16,4
714
2,9
27,0
13,9
605
2,2
29,5
11,3
493
1,5
32,0
 
0
5
10
15
20
Tw1/Tw2 = 40/30°C
15,3
1330
9,3
16,0
12,9
1117
6,8
18,5
10,4
902
4,7
21,0
7,9
682
2,9
23,0
5,2
452
1,4
25,5
LEO EX L2 airflow on 3 speed = 2200 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
42,0
1250
6,6
56,5
40,0
1190
6,0
58,5
38,0
1131
5,5
60,5
36,0
1072
5,0
63,0
34,0
1014
4,5
65,0
 
0
5
10
15
20
Tw1/Tw2 = 90/70°C
31,9
1408
8,7
43,0
29,9
1319
7,8
45,0
27,9
1229
6,8
47,0
25,8
1140
6,0
49,5
23,8
1051
5,2
51,5
 
0
5
10
15
20
Tw1/Tw2 = 80/60°C
27,4
1204
6,8
37,0
25,4
1114
5,9
39,0
23,3
1024
5,1
41,0
21,3
934
4,3
43,5
19,2
843
3,6
45,5
 
0
5
10
15
20
Tw1/Tw2 = 70/50°C
22,9
1000
5,0
31,0
20,8
910
4,3
33,0
18,7
819
3,5
35,0
16,6
728
2,9
37,0
14,5
636
2,3
39,0
 
0
5
10
15
20
Tw1/Tw2 = 60/40°C
18,3
795
3,5
24,5
16,2
704
2,8
26,5
14,0
612
2,2
29,0
11,9
518
1,6
31,0
9,7
422
1,1
33,0
 
0
5
10
15
20
Tw1/Tw2 = 40/30°C
13,1
1138
7,1
17,5
11,0
956
5,2
20,0
8,9
772
3,5
22,0
6,7
583
2,2
24,0
4,4
382
1,0
26,0
LEO EX L2 airflow on 2 speed = 1500 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
32,4
965
4,1
64,0
30,9
919
3,8
65,5
29,3
874
3,4
67,5
27,8
828
3,1
69,0
26,3
783
2,8
71,0
 
0
5
10
15
20
Tw1/Tw2 = 90/70°C
24,6
1087
5,5
48,5
23,1
1018
4,9
50,5
21,5
949
4,3
52,0
20,0
880
3,8
54,0
18,4
812
3,2
55,5
 
0
5
10
15
20
Tw1/Tw2 = 80/60°C
21,2
929
4,3
42,0
19,6
860
3,7
43,5
18,0
791
3,2
45,5
16,4
722
2,7
47,0
14,8
652
2,3
48,5
 
0
5
10
15
20
Tw1/Tw2 = 70/50°C
17,7
772
3,2
35,0
16,1
703
2,7
36,5
14,5
633
2,2
38,5
12,9
562
1,8
40,0
11,2
491
1,4
41,5
 
0
5
10
15
20
Tw1/Tw2 = 60/40°C
14,1
614
2,2
28,0
12,5
544
1,8
29,5
10,8
472
1,4
31,0
9,2
399
1,0
33,0
7,4
323
0,7
34,5
 
0
5
10
15
20
Tw1/Tw2 = 40/30°C
10,1
878
4,5
20,0
8,5
737
3,3
22,0
6,9
594
2,2
23,5
5,2
447
1,4
25,0
3,2
281
0,6
26,5
LEO EX L2 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
24,3
722
2,4
71,5
23,1
688
2,2
73,0
22,0
654
2,0
74,5
20,8
620
1,9
76,0
19,7
587
1,7
77,0
 
0
5
10
15
20
Tw1/Tw2 = 90/70°C
18,4
813
3,3
54,5
17,3
761
2,9
56,0
16,1
710
2,6
57,5
14,9
659
2,2
58,5
13,8
607
1,9
60,0
 
0
5
10
15
20
Tw1/Tw2 = 80/60°C
15,8
695
2,5
47,0
14,7
644
2,2
48,0
13,5
592
1,9
49,5
12,3
540
1,6
51,0
11,1
488
1,4
52,5
 
0
5
10
15
20
Tw1/Tw2 = 70/50°C
13,2
578
1,9
39,0
12,0
526
1,6
40,5
10,8
474
1,3
42,0
9,6
421
1,1
43,0
8,4
367
0,9
44,5
 
0
5
10
15
20
Tw1/Tw2 = 60/40°C
10,5
459
1,3
31,0
9,3
406
1,1
32,5
8,1
352
0,8
33,5
6,8
296
0,6
35,0
5,4
236
0,4
35,5
 
0
5
10
15
20
Tw1/Tw2 = 40/30°C
7,6
656
2,7
22,5
6,4
550
2,0
24,0
5,1
442
1,3
25,0
3,8
328
0,8
26,0
2,2
194
0,3
26,5
  • 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.

Explosion-proof fan

Heater with explosion-proof fan it may be used in facilities with special security requirements such as woodworking shops, paint shops, welding shops, etc.
The heater can be installed inside buildings in the explosion endangered area Z1, in rooms endangered by explosion of gas, vapour, liquids of IIA and IIB explosiveness group with the following temperature classes: T1, T2, and T3.
Control system

Control system - controls are chosen individually according to the explosion risk level in a given facility. They should be manufactured in an explosion-proof version of at least the same level as the fan.
Selection

Selection - in order to maintain the maximum-security level, the controlling automatics and electrical connections should be chosen individually according to the explosion risk level in a given object.
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