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nuaire.co.uk 

029 2085 8400

19. 02. 19. Document Number  671881

Installation Manual

NOXMASTER - PIV with Carbon Filtration

Ceiling Vent

Two Air Dams (supplied) can fit on any of the diffuser sides to guide 

airflow away from a smoke detector and/or obstructions as required.

Diffuser Cap

Airflow

Airflow

 
 

4.2 Diffuser Installation

4.2.1 Positioning the Diffuser

The diffuser has a unique air throw pattern and it is essential that it is 
located correctly in the central hallway in single storey properties or in 
the ceiling of the top floor landing on two or more storey dwellings. 
The diffuser discharges air evenly in all directions along the underside of 
the ceiling. 

Note: SMOKE ALARMS -It is also important to ensure that the 
diffuser is NOT placed within 1 metre of a smoke alarm.

If the diffuser cannot be repositioned, two sides of the diffuser must 
be closed off using the air dams supplied to encourage the air through 
the remaining open sides that faces at least 1.5 metres of unobstructed 
area away from the smoke alarm sensor.

4.2.2 Fitting the Air Dams (if Required) 

Air dams should be fitted where needed in order to alter the direction 
of airflow. Two air dams are supplied and will fit on any of the diffuser 
sides to guide airflow away from a smoke detector and/or obstructions.

4.2.3 Fitting the Ceiling Diffuser

To install the diffuser, use the tear-out template from the lid of the unit 
packaging and trace the shape onto the ceiling between two convenient 

The heater unit must be connected to the ceiling vent and fan unit 
using the 3 looms that protrude from the heater module. Connect 
the ceiling vent control loom to the circuit board on the ceiling vent 
and insert the heater module into the ceiling vent. Connect the 
interconnecting loom into the control output and the mains power 
loom into the heater output (Figure 4). The flexible duct (maximum 
length 2m) is connected to the base unit by inserting the duct over the 
outlet duct and held in place using the supplied cable tie. 

Finally when installing the duct to the heater unit, insert the duct over 
the back of the heater, over the protruding screw heads (3mm from the 
face of the duct) and fasten the cable tie below the screws. This ensures 
that the duct will be held on securely, check all duct joints are air tight. 

FURTHER MEASURES MAY BE REQUIRED.

4.3 NOXMASTER Installation

4.3.1 Connecting Sections

The unit is delivered in two sections, pod A (Carbon filter) and pod B 
(blower) which require connecting, refer to the layout drawing (Figure 
1).

Remove the nut and bolt from the black connectors on either side 
of the unit and store safely to one side.

Position the pods 1 – 1.5M away from the desired location of 
the ceiling vent. Align the two pods with both spigots facing 
out, leaving a space between the pods to make the electrical 
connection (Figure 5).

Release the free end of the fly lead from pod B and align the flats 
on the male connectors with the flats on the fixed connector in 
pod A. Push the connectors together until the outer clips have fully 
engaged and the connection is secure.

Pull the pods together and re-insert the nut and bolt back into 
the black connectors. Tighten the connectors evenly, when fully 
tightened ensure the foam gasket has been evenly compressed.

4.3.2 Fitting the NOXMASTER

Connect the two ‘L’ shape fixing brackets to the short sides of the unit 
with the M5 screws (provided), then lower the unit with the “L” shape 
fixing brackets attached, onto the joists. Mark 4 holes through the 
brackets so that the holes will be centrally positioned over a joist.

Locate anti-vibration mounts (supplied) above and below each bracket 
fixing joint hole and, using the fixings provided, fix the unit to the joists. 

Note: Do not overtighten the fixings.

Connect the flexible duct (maximum length 2m) to the blower unit 
by placing the duct over the spigot. Secure the duct in place by drilling 
through the duct and spigot (at the 2 O'clock and 10 O'clock position) 
and securing with screws (provided). Finally secure the duct to the 
heater/ceiling diffuser. Secure with a with a cable tie fitted between the 
screws and outlet face of the unit. To connect to the ceiling vent place 
the duct over the vent and secure with cable tie. Ensure all duct joints 
are airtight.   

Please note: The flexible ducting should NOT be installed 
in a compressive state, as this will negatively impact on the 
performance of the unit.

Figure 3. Ceiling Diffuser

joists. The shape is elliptical to allow space for the PCB of the controls 
and this should be positioned for ease of access (i.e. NOT facing over 
a stairwell). Once the shape has been cut out, position the ceiling vent 
and secure it in place using the 4 screws and plugs provided. After 
fitting, the fan unit must be connected to the diffuser using the loom 
provided. The connectors are located on the rear of the ceiling vent and 
the side of the POD B below the controls.  

Finally, attach the diffuser cap to the frame using the four built-in, press 
on clips provided.

4.2.4 Fitting the Heater (if Applicable) 

IMPORTANT

In the event of an ESD to the back of the control PCB on the 

diffuser the heater may switch off. The heater can be switched 

back on by pressing the button in the normal way for enabling 

the heater. Care therefore should be taken not to touch the 

back of the PCB during installation/commissioning.

Speed Setting

Minimum distance of diffuser from wall

1

100mm

2

155mm

3

400mm

4

625mm

5

850mm

6

1000mm

IMPORTANT

The unit must be situated in a dry environment that avoids 

dripping water and installed fully level in the horizontal plane.

Summary of Contents for NOXMASTER

Page 1: ... is important to ensure that the diffuser is NOT placed within 1 metre of a smoke alarm If the diffuser cannot be repositioned two sides of the diffuser must be closed off using the air dams supplied to encourage the air through the remaining open sides that faces at least 1 5 metres of unobstructed area away from the smoke alarm sensor If the unit is required to switch off in the event of smoke C...

Page 2: ...Nuaire s NOXMASTER range has been specifically designed to improve the indoor air quality and provide a whole home ventilation solution Combining the principles of positive input ventilation PIV and carbon filter technology the unit provides cleaner fresher filtered air into the a dwelling at a continuous rate encouraging the movement of air from inside to outside To achieve this the unit is mount...

Page 3: ...on of the ceiling vent Align the two pods with both spigots facing out leaving a space between the pods to make the electrical connection Figure 5 Release the free end of the fly lead from pod B and align the flats on the male connectors with the flats on the fixed connector in pod A Push the connectors together until the outer clips have fully engaged and the connection is secure Pull the pods to...

Page 4: ... screws provided and seal with silicone to eliminate air leakage Duct to the outside using ridged ducting Spigot Guard Punched out and removed 150mm inlet duct to outside Soffit grille Part No 775229 fixes over rectangular ducting which has been pulled through the rectangular hole 220mm X 80mm cut in soffit and folded flat up against the surface of the soffit Note that a minimum soffit width of 13...

Page 5: ...it Green yellow 5 2 2 NOXMASTER HEAT All Versions With Heater Heater Enable LED 7 3 Change Carbon Filter Alert The carbon filters are required to be changed every five years the display on the ceiling diffuser will show the letter C once this time has elapsed New filters can be purchased direct from Nuaire please refer to Section 8 0 below for further details To reset the change filter message on ...

Page 6: ...rol panel is illuminated the heater is active in autoheat mode and is controlled by the temperature setpoint When the orange LED is not lit the heater is off In order to enable the heater press the DOWN button for five seconds and release The orange LED will illuminate indicating that the heater is active and in auto heat mode To turn the heater off press the DOWN button for five seconds and relea...

Page 7: ... the equipment is modified without authorisation is incorrectly applied misused disassembled or not installed commissioned and maintained in accordance with the details contained in this manual and general good practice The product warranty applies to the UK mainland and in accordance with Clause 14 of our Conditions of Sale Customers purchasing from outside of the UK should contact Nuaire Interna...

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