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Blauberg KOMFORT Roto EC DE250 S17

Air handling unit with rotary heat exchanger. Maximum air flow up to 310 m³/h.
  • 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 160 and 200 mm air ducts. Additional spigot for kitchen hood air duct connection.


The fan casing is made of galvanized steel soundproofed on the inside with mineral wool. The spigots are located at the sides of the unit and are rubber sealed for airtight connection to the air ducts. KOMFORT Roto EC D(2) – model without electric heater. KOMFORT Roto EC D(2)E – model with electric heater. The insulation of KOMFORT Roto EC D(E) is 40 mm, for KOMFORT Roto EC D2(E) is 20 mm. Unit maintenance is performed from the bottom panel side. The distinctive feature of KOMFORT Roto EC D2(E) is a low casing profile.


All the models are equipped with a fifth spigot for connection of the air duct from the kitchen hood.


Two built-in filters with G4 and F7 filtration class provide efficient supply air filtration. Optionally, a H13 supply air filter may be used. The G4 filter is used for extract air filtration.


High-efficient external rotor EC motors and centrifugal impellers 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 aluminium heat exchanger. The rotary regenerator is a short, rotating cylinder, filled with corrugated aluminium sheet layers. The air streams flow through them. The band layers of the heat regenerator 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 regenerator as compared to the plate heat exchangers include no condensate generation, maintaining comfort air humidity and high freeze resistance.


The KOMFORT Roto EC D(2)E units are equipped with the 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 KOMFORT Roto EC D... S17 units are equipped with the thTune control panel with an LCD display. The KOMFORT Roto EC D... S18 units are equipped with the pGD1 control panel with an LCD display.


The air handling unit is designed for wall, wand or floor mounting.

Control via a wired remote control panel
S17 control panel
S18 control panel
BMS (Building Management Systems) option option
option option
Speed selection + +
Filter replacement indication according to filter timer according to filter timer
Alarm indication full alarm description in the mobile application full alarm description in the mobile application
Week-scheduled operation + +
Cooler connection option option
Kitchen hood connection option option
Humidity control option option
CO2 controller option option
VOC controller option option
Fire alarm sensor connection option option
option: function is available when purchasing the appropriate accessory (see the "Accessories" section).
Parameter KOMFORT Roto EC DE250 S17 Measurement unit
Voltage 230 V
Phase 1 ˜
Frequency 50/60 Hz
Max. power without electric heater 135 W
Max. unit power 835 W
Reheater power consumption 700 W
Electric heater current 3.1 A
Max. unit current without electric heater 1.0 A
Max. unit current 4.1 A
RPM 2200 min-1
Maximum air flow 310 m³/h
Maximum air flow 86 l/s
Sound pressure level at 3 m 21 dBА
Insulation 40 mm mineral wool mm
Transported air temperature -25...+40 °С
Extract filter G4 -
Supply filter G4 + F7 (Option: H13) -
Heat recovery efficiency 71–87 %
Heat exchanger type rotary -
Heat exchanger material aluminum -
Weight 56 kg
Connected air duct diameter 160 mm
Casing material painted 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
KOMFORT Roto EC D - user's manual (pdf 3.95Mb)
KOMFORT Roto EC D S17 - image (png 324.72Kb)
KOMFORT Roto EC DE250 S17 - energy label (pdf 133.75Kb)
KOMFORT Roto EC DE250 S17 - specification (pdf 118.42Kb)
S21 - user's manual (pdf 611.32Kb)
pGD1 S18/th-Tune S17 - user's manual (pdf 7.92Mb)
Designation key
Designation key
Series Unit type Motor type Mounting type Modification Heater type Nominal air flow [m³/h] Service side Control
KOMFORT Roto: rotary heat exchanger EC: electronically commutated motor D: suspended mounting, horizontally oriented spigots _: standard (insulation 40 mm)

2: low-profile (insulation 20 mm)
_: no heater

E: electric heater
250; 350; 650 R: right

L: left

  KOMFORT Roto EC DE250 S17
G4 panel filter FP 260х260х48 G4
F7 panel filter FP 260х260х48 F7
H13 panel filter FP 260х260х48 H13
Internal humidity sensor FS2
Humidity sensor HR-S
VOC sensor DPWQ30600
External CO2 sensor DPQW40200
Humidity sensor DPWС11200
Kitchen hood DAH 251-13
Backdraft air damper VRV 160
Air damper VKA 160
Electric actuator LF230
Electric actuator TF230
Module for Modbus connection PCOS004850

Model Overall dimensions [mm]
ØD B B1 H H1 L L1
KOMFORT Roto EC DЕ250 S17 160 643 688 308 345 1003 1100
Additional characteristics
Additional characteristics
Point Total power of the unit [W] Sound pressure level at 3 m (1 m) [dBA]
1 101 21 (31)
2 115 21 (31)
3 80 20 (30)
4 45 18 (28)
5 42 17 (27)
6 40 17 (27)
7 17 16 (26)
8 17 16 (26)
9 16 16 (26)


Sound power level, A-weighted Total Octave frequency band [Hz] LpA 3 m [dBA] LpA 1 m [dBA]
63 125 250 500 1000 2000 4000 8000
LwA to supply inlet [dBA] 58 21 42 45 56 53 42 32 21    
LwA to supply outlet [dBA] 59 21 43 45 56 53 42 32 21    
LwA to exhaust inlet [dBA] 53 20 38 42 52 44 36 29 18    
LwA to exhaust outlet [dBA] 54 20 38 43 53 44 36 29 18    
LwA to environment [dBA] 43 10 28 39 38 35 32 31 29 23 33

* 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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