Installation Instructions
Specifications are subject to change without notice.
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MultiVent Continuous Extract Ventilation
INSTALLATION
Position the unit, taking into consideration the position of the rooms to be ventilated, the exhaust position and the electrical services.
Ensure there is adequate access for installation and maintenance.
If the unit is sited in the heated void of the dwelling a condensate drain should not be necessary. When sited in a roof cavity, consideration should
be given to fitment of a condensate drain. Alternatively the unit and ducting can be externally insulated to minimize condensation within
the units housing.
To reduce the system resistance in your duct system, and therefore lower the speed, power consumption and noise of the fan,
follow these guidelines:
• Keep the length of duct runs to a minimum, particularly the exhaust duct run.
• When using the flexible ducting in the kit, make sure that it is fully extended and not crushed, sagging or torn.
• Try to minimize the use of diffusers/valves by having similar length duct runs to the inlets.
• The bend radius (measured to the inside of the bend), should be at least 1x the duct diameter.
• Avoid having any bends, filters or other obstructions within 250mm of the fan inlets and outlet.
Securely mount the unit through the mounting holes on the casing using appropriate fixings (not supplied) for the mounting substrate.
Fixings to be capable of securing 4x the weight of the unit. Unit weight: 4.1kg. Anti-vibration mounts, acoustic mats or rubber bushes
can also be used. Installation example shown below.
To maintain the IPx2 rating of the unit, the unit must not be mounted with the cover removal slots facing upwards (as indicated by the red arrows),
or at an angle where they are visible from above. All other orientations are acceptable.
Duct Supports
Exterior Grille
Airflow
Airflow
Interior Grille
Sealant
Cavity
Sleeve
Maximum length of
flexible ducting
Minimum radius =
diameter of ducting
Preferred flexible
ducting route
Peaks and troughs
Restrictions
Main power
connections
Low voltage
connections
