Vent Axia HR300 Heat Recovery Unit (370394)

Vent Axia HR300 Heat Recovery Unit (370394)

In stock
QS Code: QS3196

Vent Axia HR300 Heat Recovery Unit (370394)

Ducting Size Guide View Table
QS Code: QS3196

List Price: £765.00 £752.92 Excl. VAT

2 To 7 Days What's this?


    The HR300 unit incorporates 2 specially developed mixed flow fans for low noise and efficiency, with up to 70% heat recovery. Effectively lowering internal relative humidity the HR300 unit controls condensation and eliminates mould growth. Designed for through the wall mounting.

    Fresh, pre-warmed air from outside is continually provided to the room with simultaneous extraction of stale moist air and smells. Heat is transferred via a unique plastic heat exchanger from outgoing air to the fresh air supply with no cross contamination, maintaining internal temperatures and providing a fresh environment. The unit is fully controllable for speed using a small dedicated speed controller. Automatic ON/OFF control or switching to boost is easily achieved using sensors/timers e.g. humidistat. For summer operation the heat exchanger can be removed and replaced with a plastic divider board to provide positive cooling to rooms.

    Available in three speeds: 20, 58 and 83 l/s. It is ideal for light commercial applications including function rooms, offices and classrooms.


    The HR300 unit requires a 380mm x 280mm hole. Units should be level and square in the wall. The unit should be fitted so that it overhangs by a minimum of 50mm on the inside, and a minimum of 70mm on the outside. An extension sleeve is available for walls up to 650mm thick.


    Extract Performance


    Supply Performance


    Trickle Medium Boost Trickle Medium Boost
    20 58 83 19 52 75

    Power Consumption

     Maximum    108.0W
    Performance: l/s l/s
    Max ventilation rate 83 83.33
    Low Supply Rate 19 19.44
    Low Extract Rate 20 20.83
    Normal Supply Rate 52 52.78
    Normal Extract Rate 58 58.34
    Boost Supply Rate 75 75.0
    Boost Extract Rate 83 83.33
    N° speed settings 3

    Efficiency: The unit should retain up to 70% of the temperature differential of out going air.

    Heat exchanger: Should be of a multi plate cross-flow type constructed out of a polymeric plastic with ultra sonic welded joints.

    Motor: Should be a 240V 50Hz A/C with sleeve bearings and greased for life. It shall operate up to an ambient temperature of 40°C and be fitted with a manual reset thermal overload protective device.

    Fan: The 2-N° polymeric fan impellers should be of a mixed flow type, dynamically balanced mounted on a fixed stator housing.

    Controls: The unit should be operated via a remote 3 Position switch, humidistat or a humidiswitch.

    Back Draught Shutter:
    The unit should have the option back draught shutter operated via a thermal actuator set to close when unit is powered down.

    Filter: Should be a washable reticulated foam type coarse filter.

    Construction: The unit outer case should be a rigid ABS moulding. The internal/external grille should be a cream coloured ABS moulding.

    Sound Levels: dB(A) @ 3m
    Trickle: 37
    Medium: 40
    Boost: 44

    Mains electrical supply: 230VAC 50Hz.

    Complies to the following approvals/directives: LVD, EMC and CE.





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    • HR300 Datasheet