NuAire MRXBOX-AV4 Installation And Maintenance Download Page 2

2

28. 07. 20. Document Number  671814

Nuaire | 

Western Industrial Estate 

Caerphilly 

CF83 1NA 

|

 

nuaire.co.uk

MRXBOX-AV4

Installation Manual

Support Tray

MVHR Unit & Support Tray

MVHR Unit & Support Tray Dimensions (mm)

Floor Mounted Unit

Wall Bracket Dimensions (mm)

4x Rubber stand offs

Support tray

4x Anti-vibration mounts

2x Fixing points

Support tray

MVHR unit

Rear hanging bracket 
supplied with MVHR 
should not be used

9 dia.

25

25

585

33

49

49

03

3x Fixing positions per bracket

Left hand bracket

Cross brace

2x Fixing positions

Right hand bracket

MVHR unit should be made at this point as this is situated on the 
rear panel and access may be restricted when in place.

3.2 Floor Mounting

If floor mounting, the assembly is now complete and can be secured to 

41

0

79

640

=

=

Standard Configuration Shown, 
For Opposite Handed Units (OH) The Condensate Drain Is Located On Opposite Side

Bottom View

18

666

25

25

30

12

1

12

1

33

3

9

3x Fixing positions per bracket 

the desired frame/plinth (not provided) using the 4x M10 screws with a 
plain and serrated washer for each of the threaded AV mounts (Figures 
3 & 4).

3.3 Wall Mounting

The unit is designed for wall mounting on a solid wall only, a gypsum 
block/plasterboard wall will not suffice.

If it is not practical to use a solid wall, the unit should be fixed to a stud 
partition with a 25mm minimum thickness MDF panel solidly fixed 
behind the plasterboard.  If fixing to a stud wall the MDF panel should 
extend, width wise, over a minimum of 3 vertical studs with centres of 
no more than 400mm. A vertical stud should be located to correspond 
with the position each mounting bracket is to be fixed to provide 
additional support.  Add additional vertical supports if necessary. 
Height wise, the MDF panel should extend from floor to ceiling.

Fit the two angle brackets (Figure 5) to solid mounting structure (fixings 
not supplied) and secure cross brace using M5 screws.

The unit and AV mounts sub-assembly can then be placed on the wall 
brackets and secured in place using the 4x M10 screws with plain and 
serrated washers supplied for each of the threaded AV mounts  
(Figures 6 & 7).

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