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Blauberg KOMFORT EC SB 160 S21

Heat recovery air handling unit. Maximum air flow up to 200 m³/h.
EAN codeEAN4058448054464
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Designation key
  • BIM
  • Accessories
  • Dimensions
  • Additional characteristics

Air handling units for efficient energy saving supply and exhaust ventilation in flats, houses, cottages and other premises. Heat and humidity recovery minimizes ventilation heat losses during cold season and reduces air conditioner load during hot season. Controllable air exchange for creating the best suitable indoor microclimate. Compatible with round Ø 125, 160 or 200 mm air ducts.


The units are equipped with high-efficient EC motors with an external rotor and a centrifugal impeller with backward curved blades. EC motors have the best power consumption to air capacity ratio and meet the latest demands concerning energy saving and high-efficient ventilation. EC motors are featured with high performance, low noise level and optimum control across the entire speed range. The impellers are dynamically balanced.


The KOMFORT EC SB(-E) units are equipped with a bypass for ventilation (air cooling by the cool air from outside).



The casing is made of double-skinned polymer-coated steel panels, internally filled with 20, 30, 40 mm (depending on the unit model) mineral wool layer for heat- and sound-insulation. The unit is equipped with a hinged service panel to enable convenient access for maintenance or repair operations. The spigots are located at the top of the unit and are equipped with rubber seals for airtight connection to the air ducts.


The built-in F7 filter provides efficient supply air filtration. The G4 filter is used for extract air cleaning. In the KOMFORT EC SB(E) 250 units, the supply air is cleaned by the G4 filter (F7 filter optionally available).


The KOMFORT EC S(B) unit is equipped with a plate counter-flow polystyrene heat exchanger for heat recovery. The unit condensate is collected and drained to the drain pan under the heat exchanger.


The KOMFORT EC S(B)-E unit is equipped with an enthalpy plate counter-flow heat exchanger for energy (heat and humidity) recovery. Due to humidity recovery condensate is not generated in the enthalpy heat exchanger. The air flows are completely separated in the heat exchanger. Thus smells and contaminants are not transferred from the extract air to the supply air. Heat recovery is based on heat and/or humidity transfer through the heat exchanger plates. In the cold season supply air is heated in the heat exchanger by transferring the heat energy of warm and humid extract air to the cold fresh air. Heat recovery minimizes ventilation heat losses and heating costs respectively. In the warm season the heat exchanger performs reverse and intake air is cooled in the heat exchanger by the cool extract air. That reduces operation load on air conditioners and saves electricity. When the indoor and outdoor temperature difference is insignificant, heat recovery is not reasonable. In this case the heat exchanger can be temporary replaced with a summer block for the warm season (available as a specially ordered accessory).


The units are designed for wall or floor mounting. Universal casing design provides either left-handed or right-handed unit installation.


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

the Blauberg AHU
app for Android

the Blauberg AHU
app for iOS

The KOMFORT EC S(B)(-E) S14 units have an integrated automation system with a wall-mounted control panel S14 with a LED indication.

Functions KOMFORT EC S(B)(-E) S21 KOMFORT EC S(B)(-E) S14
Unit control via Wi-Fi using a mobile application +
Unit control via a wired remote control panel
S22 control panel (option)
S14 control panel
Unit control via a wireless remote control panel
S22 Wi-Fi control panel (option)
Unit 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 by filter timer
by filter clogging differential pressure switch (KOMFORT EC SB 550)
Alarm indication full alarm description in the mobile application LED alarm indication
Week-scheduled operation +
Bypass automatic
manual manual
Timer +
Boost mode +
Fireplace mode +
Freeze protection through cyclic stops of the supply fan through cyclic stops of the supply fan
through preheating (option)
Reheater connection option
Cooler connection option
Minimum supply air temperature control +
Humidity control option option
CO2 control option option
VOC control option
PM2.5 control option
Fire alarm sensor connection option option
Option: function is available when purchasing the appropriate accessory (see the "Accessories" section).
Parameter KOMFORT EC SB 160 S21 Measurement unit
Voltage 230 V
Phase 1 ˜
Frequency 50/60 Hz
Current 0.5 A
Power 57 W
Maximum air flow 56 l/s
Maximum air flow 200 m³/h
Sound pressure level at 3 m 24 dBА
Insulation 20 mm mineral wool mm
Transported air temperature -25...+40 °С
Extract filter G4 -
Supply filter F7 (option: G4) -
Heat recovery efficiency 85...93 %
EC motor yes -
Heat exchanger type counter-flow -
Heat exchanger material polystyrene -
Weight 36 kg
Connected air duct diameter 125 mm
Casing material polymer-coated steel -
SEC class A+ -
Mounting wall mounting, floor mounting -
ErP 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
KOMFORT EC SB - data sheet (pdf 1.46Mb)
KOMFORT EC SB 160/350/550(-E) - user's manual (pdf 3.04Mb)
KOMFORT EC SB160 S21 - energy label (pdf 52.65Kb)
KOMFORT EC SB160 S21 - specification (pdf 27.87Kb)
KOMFORT EC SB 160/350/550 (-E) S21 - image (png 401.27Kb)
S21 - user's manual (pdf 611.32Kb)
Designation key
Designation key
Series Motor type Spigot modification Bypass Heater type Rated air flow, [m³/h] Heat exchanger type Service side Control
KOMFORT EC: electronically commutated motor S: vertical spigot orientation _: no bypass
B: with a bypass
_: no heater
E: integrated electric preheater
160; 250; 350; 550 _: heat recovery
-E: energy recovery
L: left
R: right (for KOMFORT EC SB(E) 250 only)

G4 panel filter FP 285x195x10 G4
F7 panel filter FP 285x195x10 F7
Control panel S22
Wireless control panel S22 Wi-Fi
LCD control panel S25
Humidity sensor FS2
CO2 sensor with indication CD-1
CO2 sensor CD-2
Humidity sensor HR-S
Electric preheater EVH 125 S21 V.2
Electric reheater ENH 125 S21 V.2
Syphon kit (for the units without an enthalpy heat exchanger) SFK 20x32
Air damper VKA 125
Electric actuator TF230

Model Overall dimensions [mm]
KOMFORT EC SB 160 S21 125 330 580 600
Additional characteristics
Additional characteristics
Point Total power of the unit [W] Sound pressure level at 3 m (1 m) [dBA]
1 57 24 (34)
2 56 23 (33)
3 54 23 (33)
4 28 20 (30)
5 27 20 (30)
6 26 20 (30)
7 14 13 (23)
8 13 13 (23)
9 13 13 (23)


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] 52 28 46 49 41 35 33 36 29    
LwA to supply outlet [dBA] 60 32 52 58 47 37 36 41 35    
LwA to exhaust inlet [dBA] 51 27 45 49 41 36 32 35 29    
LwA to exhaust outlet [dBA] 60 31 50 59 48 36 36 41 32    
LwA to environment [dBA] 45 25 41 42 34 31 28 27 22 24 34

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) [%]

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