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Warm Air Curtain N709

The Bush Nelson range of warm air curtains are specifically designed to be mounted over doorways to counteract the draughts associated with frequently opening doors.

The recommended mounting height is 2-3 metres from the floor, whilst not intended to be used in areas containing flammable and/or explosive materials these heaters are ideal for shops, offices, hotels and similar applications.

Powerful 3kW output
Simple ‘drop on’ mounting
Soft oyster grey colour
Three position selection off/heat/fan only
PTC safety overheat cut out
Optional angle mounting bracket set (N709WB)


List No. kW Volts Dimensions (mm) db(a) Weight
Length X Width Y Depth Z Fixing A
N709 3 230 552 172 105 460 47 3.8


LOCATION - The heater is designed for wall mounting and is normally positioned over a door so that the discharge forms a warm air flow over the doorway. DO NOT COVER THE HEATER as this can cause overheating, and may damage the unit and COULD ALSO CAUSE A RISK OF FIRE. The heater is intended to be used in areas which are free from any excessive dust and should not be used in areas containing flammable and or explosive material.

POSITIONING - The heater must NOT be located below a fixed socket. For optimum performance, the heater should be mounted as close to the top of the door opening as possible, not more than 3m from the floor. Ensure the heater is clear of any door mechanism. Minimum distance from the ceiling is 300mm.

WALL MOUNTING N709 - The heater must only be mounted horizontally and simply drops on to a bracket. To fix the bracket, drill two holes 460mm apart from screw centres and secure the bracket firmly and level. Slide the heater into position.

CONNECTIONS N709 - The heater is supplied with a convenient length of suitable flex. Connection to the mains should be made by way of a suitable switch, plug or other device and in accordance with current regulations and protected by an appropriate fuse or circuit breaker. Connect the heater using the Live cable, usually brown to the terminal marked L, connect the Neutral cable usually blue to the terminal marked N, and connect the earth cable usually green/yellow to the terminal marked E, and having the symbol . THIS UNIT MUST BE EARTHED.

CONTROLS N709 - Heater control is achieved by means of a three position switch. The central position marked O is off. Position marked I is fan only no heat, position marked ll is full 3kW heat output.


Prior to commencing any periodic cleaning or servicing always ensure the supply to the heater Is completely isolated.

Bush Nelson Electric heaters are factory assembled and tested they are non user serviceable.

The heaters are intended to operate for many years, problem free.

All moving parts are factory lubricated and therefore should require no service.

Maintenance is limited to keeping both the inlet and outlet areas free from any accumulation of dust or any other foreign materials. This is especially important immediately before the heating season. Any dust build up can be loosened using a brush and a vacuum cleaner applied to the airways to ensure completed removal of any dust . When the heater is first turned on after cleaning an unusual odour may be noted this is due to the dust particles which inevitably will be disturbed and will be burnt off from the heating element.

If in any doubt always consult a qualified electrician for advice.

WARRANTY. Your Bush Nelson Heater is guaranteed for the period of one year from the date of purchase. We will repair or replace at our discretion any part found to be defective.
Bush Nelson cannot assume any consequential liability. This guarantee in no way prejudices your rights under common law and is offered as an addition to consumer liability rights.