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© COPYRIGHT Weiss Ltd 2020.  All rights reserved 

Weiss Limited reserves the right to alter designs and specifications 

without notice and without obligation 

FV604 

Revision 03.0 210520 

 

heat will then be moved through the transfer system to other parts of the house. In a typical installation, it 
will take approximately one hour to warm rooms with transferred heat. 
 
1.

 

When mounting the inlet vent make sure it’s far enough from the flue to avoid excess heat on the fascia 

and will not ingest too much smoke when the firebox is opened, (Between one and two meters from the 
flue.) The fascia mounting body must fit freely in the hole 

2.

 

Finally, attach the ducting to the rear of the fascia body, secure with provided cable tie, repeat step for 
outlet vents. 

**SEE PLACEMENT OF OUTLETS 

3.

 

Slide the outlet vent fascia mounting back into place and screw into place using the four 6x¾ pan head 
screws provided.  Press the fascia ring onto the body and then screw the centre diffuser into position 

4.

 

In the ceiling cavity suspend the motor junction from the rafters. There is a directional arrow on the main 
fan body showing the flow of air through the inline fan unit. When fitting the ducting, ensure that the 
arrows on the motor housing are pointing in the direction of the outlet vent. 
 

DIGITAL CONTROLLER 

The enclosed Weiss 

Heat Transfer System

 comes complete with a wall-mounted controller. Weiss 

Heat 

Transfer Systems

 MUST ALWAYS be wired through the included controller.  The best placement is in a 

convenient location within the room with the heat source, around light switch height, this can vary 
depending on room layout 

 but use this as a guide. The controller needs to be fitted in accordance with 

the instructions enclosed with the controller unit. Ensure the controller is located in the same room as the 
heat source, approximately 3-4 metres away at wall switch height.

 

 

FINAL STEPS 

Finally, connect the wiring as illustrated in the included wiring diagram.   

Note:

  Approximate means of disconnection are required to be incorporated in the fixed wiring. This product 

must be installed by registered Electrician. 
 

Important mounting information 

1.

 

Use no more than 3 metres of ducting from the inlet to the fan motor and 3 metres to the junction. 
(This will allow enough supplied cable to connect the controller to the fan) 

2.

 

Suspend the motor and keep it at least 150mm above the ceiling or insulation. 

3.

 

Keep the ducting as short as possible from the junction to the outlet vents  

4.

 

Ensure the ducting to each outlet is the same length to ensure equal airflow to each room. 

5.

 

Ensure all ducting is at least 1.5 meters away from the flue in the ceiling cavity 

 

CLEANING AND MAINTENANCE 

Isolate the unit from the mains before cleaning.

 

To clean the fascia, simply wash it by hand with a damp 

cloth and warm soapy water.  Do not use abrasives or solvent cleaners.  

The fan unit needs to be wiped clean internally every 2 years to remove dust and residue from the fan 
blades and motors

 

and the terminal connections also need to be checked and tightened at this time. 

All this maintenance work must be undertaken by a registered Electrician

.  

 

LENGTH OF DUCT 

Have the 

Heat Transfer System

 fan and junction-to-room lengths as short as possible, 1x length (3mtrs) of 

ducting must be fitted between the inlet grill and the fan motor.  Have the duct stretched out and as 
straight as possible.  Be sure to cut off any excess.  Support duct and bends from the rafters as necessary. 
 

**PLACEMENT OF OUTLETS 

Keep the outlet ducting lengths as short as possible - this increases efficiency.  It is not necessary, to put 
outlet in the centre of the room.  The outlet vent needs only to be in the corner of the room. 
 

Note:

 Initially, the fire or 

heat source needs to be running at maximum.

 It takes a while to heat a room and is 

dependent on humidity and on the moisture content of the furnishings.  We recommend that the door to 
the room with the heat source is left ajar to ensure that air can circulate through the room. We also 
recommend that the house is aired out occasionally in fine weather. High studs, or badly insulated homes 
will remain more difficult to heat than low ceiling 

 well insulated homes. 

 

 

 

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