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Blauberg KOMFORT Ultra L250-H S12 white

Compact heat recovery air handling units. Maximum air capacity up to 250 m³/h.
EAN codeEAN4058448022395
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Designation key
  • Accessories
  • Dimensions
Air handling units for efficient supply and exhaust ventilation in flats, houses, cottages and other buildings.Heat and humidity recovery reduces ventilation heat losses in the cold season and the load on the air conditioners in the hot season.Heat recovery minimises ventilation heat losses.Control of air exchange for creating comfortable indoor microclimate.Compatible with round Ø125 mm air ducts.
The casing of KOMFORT Ultra L250-H(E) S12 white is made of double-skinned aluzinc panels, internally filled with 20 mm, mineral wool layer for heat and sound insulation.The casing of KOMFORT Ultra L250-H(E) S12 white is made of double-skinned white painted metal panels, internally filled with 20 mm, mineral wool layer for heat and sound insulation.The spigots for connection to the air ducts are located at the side of the unit.The hinged panel of the casing ensures easy access to the unit internals for service works including cleaning, filter replacement, etc. Asynchronous external rotor motors and centrifugal impellers with backward curved blades are used for air supply and exhaust.Integrated motor overheating protection with automatic restart.Dynamically balanced impellers.Equipped with ball bearings for longer service life.Reliable and quiet operation.
The KOMFORT Ultra L250-H S12 (white) unit is equipped with a plate cross-flow polysterene heat exchanger that recovers heat.
The drain pan under the heat exchanger block of the KOMFORT Ultra L250-H S12 (white) is used for condensate collection and drainage.
The KOMFORT Ultra L250-E S12 (white) unit is equipped with a plate enthalpy cross-flow heat exchanger made of polymerized cellulose that recovers heat and humidity.
Due to humidity recovery the enthalpy heat exchanger produces no condensate. The air flows are fully separated within the heat exchanger. Odours and contaminants contained in the extract air are not transferred to the supply air flow.Heat recovery is based on heat and/or humidity transfer through the plates of the heat exchanger. 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 heat losses, which reduces the cost of space heating. In summer the heat exchanger performs reverse and intake air is cooled in the heat exchanger by the cool extract air. This reduces load on air conditioners and saves electricity.When the indoor and outdoor temperature difference is small heat recovery is not reasonable. In this case the heat exchanger can be temporary replaced with a summer block for warm seasons (available separately).           FREEZE PROTECTION The electronic freeze protection system is used to prevent the heat exchanger freezing in cold seasons. In case of freezing danger communicated by the temperature sensor the supply fan is stopped to let warm extract air warm up the heat exchanger. After that the supply fan is turned on and the unit reverts to the normal operation mode.
The built-in G4 supply filter and G4 extract filter provide air filtration.A F8 supply filter (specially ordered accessory) may be used for efficient supply air filtration.
Smooth motor speed control from 0 up to 100 % by means of the thyristor speed controller SGS E1 (included in the delivery).
The units can be fixed to the wall or mounted on the floor using the mounting brackets. The KOMFORT Ultra L250-E S12 (white) unit is also suitable for ceiling mounting.
While mounting provide free access to the service panel for filter replacement and servicing.
The KOMFORT Ultra L250-H S12 (white) unit mounting position must provide condensate collection and drainage.
Due to universal casing design both left and right mounting is possible. It requires swapping the service and the back panel.
Parameter KOMFORT Ultra L250-H S12 white Measurement unit
Voltage 220-240 V
Phase 1 ˜
Frequency 50/60 Hz
Power 148 W
Total unit current 0.78 A
RPM 2700 min-1
Maximum air capacity 250 m³/h
Maximum air flow 69 l/s
Sound pressure level at 3 m distance 28...47 dBА
Temperature of transported air -25...+40 °С
EC motor no -
Insulating material 20 mm mineral wool mm
Filter: extract/supply G4 -
Replaceable filter G4 (F8 PM2.5 81 %)* -
Heat recovery efficiency 55...78 %
Heat exchanger type cross-flow -
Heat exchanger material polystyrene -
Connected air duct diameter 125 mm
Outdoor mounting no -
Sound-insulated casing yes -
Air duct for round air ducts -
Type Supply and exhaust -
SEC class B -
Mounting wall mounting, floor mounting -
ErP 2016 -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air capacity:
  • Pressure:
Operating point
  • Air capacity: --
  • Pressure: ---
Documents archieve
Documents archieve
KOMFORT Ultra L250 - data sheet (pdf 963.23Kb)
KOMFORT Ultra L250 - user's manual (pdf 7.46Mb)
KOMFORT Ultra L250 - image (png 347.98Kb)
KOMFORT Ultra L250-H S12 white - energy label (pdf 54.41Kb)
KOMFORT Ultra L250-H S12 white - specification (pdf 28.23Kb)
SGS E1 - user's manual (pdf 697Kb)
CDT(E) E1.8 - user's manual (pdf 412.19Kb)
Designation key
Designation key
Series Unit type Spigot modification Nominal air flow [m³/h]   Heat exchanger type Control Casing
KOMFORT Ultra: compact unit L: horizontal spigot orientation 250 Н: heat recovery
Е: energy recovery
S12: speed controller SGS E1 _: aluzinc
white: white-painted steel
    KOMFORT Ultra L250-H S12
KOMFORT Ultra L250-H S12 white
KOMFORT Ultra L250-E S12
KOMFORT Ultra L250-E S12 white
G4 panel filter FP 240x184x40 G4
F8 panel filter FP 240x184x40 F8
Silencer SD 125
Silencer SDF 125
Backdraft air damper VRV 125
Air damper VK 125
Summer block SB C4 200/240

Model Dimensions [mm]
D B H H1 L L1
KOMFORT Ultra L250-H S12 white 125 300 443 43 713 810