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Blauberg Reneo S 351 R S21

Heat recovery air handling unit.
Maximum air flow up to 410 m³/h.
Heat recovery efficiency up to 92 %.
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Designation key
  • Dimensions
  • Additional characteristics
  • Accessories

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


The casing is made of expanded polypropylene (EPP) with high heat- and sound-insulating properties. Reneo S 351 R – right-handed unit.The Reneo S 351 units have flat service hatch design, suitable for decorative panel installation (delivered separately).



The unit is equipped with high-efficiency EC external rotor motors and centrifugal impellers with backward-curved blades.


Two built-in Coarse 90% (G4) filters provide efficient supply air filtration. Supply ePM1 65% (F7) filter available as an option.


The Reneo S units are equipped with a bypass, which can be opened if there is a need to cool down the ventilated area with cool intake air.

RENEO S 350 L   RENEO S 350 R


The Reneo S unit is equipped with a counter-flow polysterene heat exchanger for heat recovery. The condensate is collected and drained to the drain pan under the heat exchanger.


The units are designed for suspended ceilling mounting, floor mounting, vertical or horizontal wall mounting.


Reneo S S21 units are equipped with an integrated automation system. The remote control panel is not included in the delivery set. The S21 controller allows to integrate the unit into the Smart Home system or BMS (Building Management System). Unit control is done via Wi-Fi using the mobile application Blauberg Home.

the Blauberg Home
app for Android
the Blauberg Home
app for iOS
Functions Reneo S S21
Unit control via Wi-Fi using a mobile application +
Unit control via a wired remote control panel
S22 control panel (option)
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 clogging differential pressure switch
Alarm indication full alarm description in the mobile application
Week-scheduled operation +
Bypass automatic
Timer +
Boost mode +
Fireplace mode +
Freeze protection through cyclic stops of the supply fan
through preheating (option)
Reheater connection option
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: the function is available when purchasing the appropriate accessory (see the "Accessories" section).
Parameter Reneo S 351 R S21 Measurement unit
Voltage 230 V
Phase 1 ˜
Frequency 50/60 Hz
Max. power without electric heater 210 W
Max. unit power 210 W
Max. unit current without electric heater 1.54 A
Max. unit current 1.54 A
Maximum air flow 410 m³/h
Sound pressure level at 3 m 27 dBА
Max. operating temperature 45 °С
Insulation 45 mm mm
Extract filter G4 / Coarse > 60 % -
Supply filter G4 / Coarse > 60 % (option: F7 / ePM1 60 %) -
Heat recovery efficiency 92 %
EC motor yes -
Heat exchanger type counter-flow -
Heat exchanger material polystyrene -
Weight 26 kg
Connected air duct diameter 160 mm
Casing material expanded polypropylene -
SEC class A+ -
Mounting ceiling mounting, wall mounting, floor mounting -
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)
Reneo S 350 - data sheet (pdf 1.57Mb)
Reneo S 351 - image (png 427.4Kb)
Designation key
Designation key
Series Casing type Heater Nominal size Modification   Heat exchanger type Unit version Controller type
Reneo S: vertical _: w/o heater 35: nominal airflow 1: flat service hatch suitable for decorative panel installation –  _: heat recovery R: right-handed S21
Model Overall dimensions [mm]
Ø D H H1 L L1 W W1
Reneo S 351 R S21 160 880 939 616 230 770 355
Additional characteristics
Additional characteristics

Sound power level,
Total Octave frequency band [Hz] LpA 3 m LpA 1 m
63 125 250 500 1000 2000 4000 8000
Point 1                      
LwA to environment [dBA] 55 34 42 41 46 45 40 37 34 35 44
Point 4                      
LwA to environment [dBA] 47 24 32 31 36 40 30 27 25 27 36
  Reneo S 351 R S21
G4 panel filter FP 496x150x60 Coarse 90% G4
F7 panel filter FP 496x150x60 ePM1 65% F7
Decorative panel EP-Reneo S 351
LCD control panel S25
Control panel S22
Wireless control panel S22 Wi-Fi
Internal humidity sensor FS2
Internal CO2 sensor CD-3
CO2 sensor with indication CD-1
CO2 sensor CD-2
Humidity sensor HR-S
Electric preheater EVH 160 S21 V.2
Electric reheater ENH 160 S21 V.2
Syphon kit (for the units without an enthalpy heat exchanger) SFK 20x32
Silencer SD 160
Air damper VKA 160
Electric actuator TF230
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