Vent-Axia HR300, Installation And Maintenance Instructions Manual

3.0   Installation

Blind Grommet

280mm

380mm

3.3 

Installing the Appliance

From Inside

1. Slide the unit into the mounting hole and 
ensure that the minimum overhang requirements 
are achieved inside and out (Fig. 4).

2. The HR300 requires an overhang internal and 
external (Fig. 5):

Internal 50mm

External 55mm

Fig. 4

55mm

Internal 

External

3. Ensure that the unit is square and true with the 
outside wall face. If firmer fixings are required, 
secure the unit in place with the two fixing screws 
provided.

NOTE: 

Ensure the fixings DO NOT inhibit 

removal or replacement of the heat exchanger.

4. Make good around the case.

5. Fit the bezel on the inside to cover the making 
good by pressing the bezel over the case (Fig. 6).

3° Min 

CAUTION: 

Ensure the case does not distort 

during fixing and making good.

For Drainage

50mm

Fig.5

From Outside

1. Slide the panel flange (flange first) on to the 
unit and press the flange firm against the outer 
wall (Fig. 6).

2. Secure the panel flange to the wall using the 
fixing screws provided. If necessary the panel 
flange can be secured to the case by self-tapping 
screw 25mm long maximum.

Bezel

Fig. 6

Panel Flange