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Northvent KOMFORT Ultra D105/D105-A


Single room heat recovery air handling units. Maximum air flow up to 106 m³/h.


FEATURESAir handling units for efficient supply and exhaust ventilation in flats, houses, cottages and other buildings. Heat recovery minimises ventilation heat losses. Controllable air exchange for creating the best suitable indoor microclimate. Compatible with round Ø 125 mm air ducts.
DESIGNThe compact casing is made of double-skinned aluzinc panels, internally filled with 15 mm PE foam film layer for heat and sound insulation. The casing has mounting angles for easy installation. The spigots for connection to the air ducts are located at the side of the unit and are rubber sealed for airtight connection to the air ducts. The supply and exhaust spigots are equipped with backdraft dampers. The hinged side panel of the casing ensures easy access to the internals for cleaning and other maintenance operations. FANSAsynchronous motors are used for air supply and exhaust. Centrifugal impeller with forward curved blades ensures high pressure and low noise level. Integrated overheating protection. Dynamically balanced impellers. Equipped with ball bearings for longer service life.
HEAT RECOVERY The KOMFORT Ultra D105-A unit is equipped with a plate cross-flow polystyrene heat exchanger for heat recovery. In the unit condensate is collected and drained to the drain pan under the heat exchanger. The KOMFORT Ultra D105 unit is equipped with an enthalpy plate cross-flow heat exchanger for enegry (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).

FROST PROTECTIONThe integrated electronic frost protection system in KOMFORT Ultra D105-A is used to prevent the heat exchanger freezing in cold seasons. In case of heat exchanger 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 the supply fan is turned on and the unit reverts to the normal operation mode.

AIR FILTRATIONThe built-in G4 supply filter and G4 extract filter provide air filtration.

CONTROL AND AUTOMATION The unit has three speeds. Air flow control by the external speed switch CDP-3/5.

MOUNTINGIndoor installation in horizontal position. Mounting in a false ceiling is possible due to compact casing size. A small air distribution network for central ventilation may be arranged based on the unit. The correct mounted unit must provide free access to the hinged side panel for servicing and filter replacement.


KOMFORT Ultra D105 KOMFORT Ultra D105-A
G4 panel filter FP 240x202x8 G4 FP 205x198x8 G4
Silencer SD 125 SD 125
Silencer SDF 125 SDF 125
Backdraft air damper VRV 125 VRV 125
Air damper VK 125 VK 125
Summer block SB C4 200/190 SB C4 200/190


Parameter KOMFORT Ultra D105
(1 speed)
KOMFORT Ultra D105
(2 speed)
KOMFORT Ultra D105
(3 speed)
Measurement unit
Voltage 220-240 220-240 220-240 V
Phase 1 1 1 ˜
Frequency 50 50 50 Hz
Power 30 38 56 W
Current 0.18 0.23 0.34 A
RPM 1300 1950 2500 min-1
Air capacity 16 22 29 l/s
Air capacity 57 78 106 m³/h
Sound pressure level at 3 m distance 24 32 41 dBА
Temperature of transported air -25…+40 -25…+40 -25…+40 °С
Insulating material 15 mm PE foam film 15 mm PE foam film 15 mm PE foam film mm
Filter: extract/supply G4 G4 G4
Heat recovery efficiency 65…76 65…76 65…76 %
Moisture recovery efficiency …45 …45 …45 %
Heat exchanger type cross-flow cross-flow cross-flow
Weight 10 10 10 kg
Heat exchanger material enthalpic membrane enthalpic membrane enthalpic membrane
Connected air duct diameter 125 125 125 mm
Casing material aluzinc aluzinc aluzinc
SEC class D D D
Mounting ceiling mounting ceiling mounting ceiling mounting


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