Water after-heating element Comfort - Integrated

An after-heating element is often installed if you want to be able to control the supply air temperature. A low supply air temperature may, at times, feel like a draught. By ensuring that the supply air temperature does not fall below a certain level, you achieve a good, comfortable indoor climate.  

The water after-heating element is for mounting inside the unit and should be connected to the primary heat supply. It is available for the following units:
Comfort 300LR, Comfort 450 and Comfort 600

Integration The heating element is integrated into the ventilation unit
Automation 0-10V signal
Airflow > 1,5 m/s
Max. air temperature 50 ºC
Plate type Aluzinc steel plate
Tightness class IP44
Safety thermometer 2 pcs.

The heating element is only intended for heating up clean air.

It is available for the following units:

- Comfort 300LR
- Comfort 450
- Comfort 600

Calculation of correct heating element​:

Δt * air density * air volume [m3/h]

E.g. 1: No pre-heater mounted. The temperature must be raised from -10 ºC til 21 ºC at 200 m3/h.

31 * 0,34 * 200 = 2108 W

As a minimum, the heating element must be able to supply 2108 W

E.g. 2: A pre-heater is mounted. The temperature must be raised from16 ºC to 21 ºC at 200 m3/h

5 * 0,34 * 200 = 340 W

As a minimum, the heating element must be able to supply 340 W

 

Water side Air side
Temperature
input/output
[ºC]
Flow
[m3/s]
Pressure drop
[kPa]
Output
[W]
Airflow
[m3/h]
Temperature
before WHE*
[ºC]
Temperature
after WHE*
[ºC]
Pressure drop
over WHE*
[Pa]
40/30 0,04 0,85 520 100 16 31,1 2
- 0,06 1,25 640 135 16 29,8 3
- 0,08 2,18 870 210 16 28,1 6
- 0,11 4,65 1320 400 16 25,7 17
- 0,17 9,62 1980 800 16 23,2 53
- 0,19 11,9 2230 1000 15 22,5 77
60/40 0,04 0,69 940 100 16 43,5 2
- 0,05 1,00 1160 135 16 41,1 3
- 0,07 1,75 1580 210 16 38,0 6
- 0,10 3,70 2400 400 16 33,5 17
- 0,16 7,66 3580 800 16 29,1 53
- 0,18 9,48 4030 1000 16 27,8 77
70/40 0,03 0,40 1060 100 16 47,0 2
- 0,04 0,58 1300 135 16 44,2 3
- 0,05 1,00 1760 210 16 40,5 6
- 0,08 2,09 2640 400 16 35,3 17
- 0,11 4,25 3900 800 16 30,3 53
- 0,13 5,24 4380 1000 16 28,8 77

*Water after-heating element

For more information regarding installation, please see the installation instructions for the particular product.

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