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Blauberg KOMFORT Roto EC S6K 200 S21

Air handling unit with rotary heat exchanger. Maximum air flow up to 270 m³/h.
EAN codeEAN4058448068157
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Designation key
  • Accessories
  • Dimensions
  • Additional characteristics

Air handling units for efficient supply and exhaust ventilation in flats, houses, cottages and other buildings. Heat recovery is provided by the rotary heat exchanger and minimizes ventilation heat losses. Controllable air exchange for creating the best suitable indoor microclimate. Compatible with round Ø 125 mm air ducts. Additional spigot for kitchen hood air duct connection.


The fan casing is made of galvanized steel, internally filled with mineral wool layer for heat and sound insulation. The spigots are located at the top of the unit and are rubber sealed for airtight connection to the air ducts. The insulation is 20 mm thick. KOMFORT Roto EC S6K: model without an electric heater. KOMFORT Roto EC S6EK: model with an electric heater.


All units are equipped with a built-in kitchen hood.



Two built-in G4 and F7 filters provide efficient supply air filtration. The G4 filter is used for extract air filtration.


High-efficient external rotor EC motors and centrifugal impellers with forward curved blades are used for air supply and exhaust. EC motors have the best power consumption to air flow ratio and meet the latest demands concerning energy saving and high-efficient ventilation. EC motors are featured with high performance, low noise level and totally controllable speed range. Dynamically balanced impellers.


The unit has a high-efficient rotary heat exchanger (regenerator). The rotary heat exchanger is a short, rotating cylinder, filled with corrugated aluminium sheet layers. The air streams flow through them. The band layers of the heat exchanger first come in contact with the supply and then with extract air flows. Therefore the band is alternatively warmed up and cooled down and the extract air heat and humidity are transferred to the cold intake air. This way heat recovery reduces heat losses in the cold season and reduces operation load for air conditioner in the warm season. The advantages of the rotary heat exchanger as compared to plate heat exchangers include no condensate generation, maintaining comfort air humidity and high freeze resistance.


The unit can be fixed to the wall and embedded into the kitchen set.It is possible to attach decorative kitchen panels to the front panel of the unit.During mounting stage the front and the back panels can be reversed providing either left-handed or right-handed unit mounting.


The KOMFORT Roto EC S6EK units are equipped with an electric heater. If the necessary temperature level of the supply air cannot be achieved through heat recovery, the heater turns on automatically and heats the air supplied to the premise. The heaters incorporate protective measures securing the safe unit operation.


The units are equipped with an integrated automation system. The remote control panel is not included in the delivery set (purchased separately). The S21 controller allows integrating the unit into the Smart Home system or BMS (Building Management System). The unit can be controlled via the Blauberg AHU mobile application via Wi-Fi.

Download the
Blauberg AHU
app for Android

Download the
Blauberg AHU
app for iOS

Functions Description
Control via Wi-Fi using a mobile application +
Control via a wired remote control panel
S22 control panel (option)
Control via a wireless remote control panel
S22 Wi-Fi control panel (option)
Control via a wired remote LCD control panel
S25 control panel (option)
BMS (Building Management System) RS-485
Blauberg Cloud Server service +
Speed selection +
Filter replacement indication by filter timer
Alarm indication full alarm description in the mobile application
Week-scheduled operation +
Timer +
Boost mode +
Fireplace mode +
Cooler connection option
Minimum supply air temperature control +
Humidity control option
CO2 control option
VOC control option
PM2.5 control option
Fire alarm sensor connection option

option: function is available when purchasing the appropriate accessory (see the "Accessories" tab).

Parameter KOMFORT Roto EC S6K 200 S21 Measurement unit
Voltage 230 V
Phase 1 ˜
Frequency 50/60 Hz
Max. power without electric heater 118 W
Max. unit power 118 W
Max. unit current without electric heater 1.0 A
Max. unit current 1.0 A
RPM 1800 min-1
Maximum air flow 75 l/s
Maximum air flow 270 m³/h
Sound pressure level at 3 m 28 dBА
Insulation 20 mm mineral wool mm
Transported air temperature -25…+40 °С
Extract filter G4 -
Supply filter G4, F7 -
Heat recovery efficiency 75–92 %
EC motor yes -
Heat exchanger type rotary -
Heat exchanger material aluminum -
Connected air duct diameter 125 mm
Weight 47 kg
Casing material polymer-coated steel -
SEC class A -
ErP 2016, 2018 -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air capacity:
  • Pressure:
Operating point
  • Air capacity: --
  • Pressure: ---
Documents archieve
Documents archieve
Select a document type
  • Catalogues
  • Technical documentation
  • Certificates
S21 - user's manual (pdf 611.32Kb)
KOMFORT Roto EC S6(E)K 200 - data sheet (pdf 1.26Mb)
KOMFORT Roto EC S6K 200 S21 - image (png 389.77Kb)
KOMFORT Roto EC S6K 200 S21 - energy label (pdf 94.87Kb)
KOMFORT Roto EC S6K 200 S21 - specification (pdf 78.48Kb)
KOMFORT Roto EC S6(E)K 200 - user's manual (pdf 2.32Mb)
Designation key
Designation key
Series Unit type Motor type Spigot modification Casing type Additional components Rated air flow [m³/h] Control
KOMFORT Roto: rotary regenerator EC: electronically commutated motor S: vertical spigot orientation 6: casing for a thin kitchen hood
_: no heater
E: electric heater
K: kitchen hood
200 S21
  KOMFORT Roto EC S6(E)K 200 S21
G4 panel filter FP 284x103x60 G4
F7 panel filter FP 284x103x60 F7
Control panel S22
Wireless control panel S22 Wi-Fi
LCD control panel S25
Humidity sensor FS2
Humidity sensor HR-S
Humidity sensor DPWC11200
CO2 sensor with indication   CD-1
CO2 sensor   CD-2
External CO2 sensor DPQW40200
VOC sensor DPWQ30600
Silencer   SD 125
Backdraft air damper VRV 125
Air damper VKA 125
Electric actuator LF230
Electric actuator TF230

Model Overall dimensions [mm]
Ø D B B1 H H1 L
KOMFORT Roto EC S6K 200 S21 125 348 371 791 865 598
Additional characteristics
Additional characteristics
Point Total power of the unit [W] Sound pressure level at 3 m (1 m) [dBA]
1 103 28 (38)
2 98 28 (38)
3 85 29 (39)
4 43 21 (31)
5 40 21 (31)
6 37 20 (30)
7 18 19 (29)
8 17 19 (29)
9 16 17 (27)


Sound power level, A-weighted Total Octave frequency band [Hz] LpA 3 m LpA 1 m
63 125 250 500 1000 2000 4000 8000
LwA to supply inlet [dBA] 54 48 42 51 44 41 40 39 31    
LwA to supply outlet [dBA] 69 34 45 54 61 64 64 59 54    
LwA to exhaust inlet [dBA] 54 48 41 52 43 33 32 34 30    
LwA to exhaust outlet [dBA] 61 32 40 51 57 53 55 53 47    
LwA to environment [dBA] 49 25 41 43 43 39 38 35 24 28 38

Data provided for point 1 of the air flow diagram


Calculation of air temperature downstream of the heat exchanger:
t = toutd + khr × (textr - toutd) / 100,

where toutd – outdoor air temperature [°C] textr – extract air temperature [°C] khr – heat exchanger efficiency (according to the diagram) [%]