Hoxton Stove User Guide
BK755 Page 13
5.1.4 Secondary Air Control
The control has an internal rotary plate with slots housed inside the body of the appliance,
and is located below the left hand corner of the fire door assembly, when looking at the
front of the appliance.
Sliding the control knob to the right as far as it will go, achieves the fully open position, see
Figure 3. Sliding it to the left will reduce or shut down the air as shown in Figure 4.
NOTE : If your stove installation is within a smoke control area, it will be fitted with a
restrictor plate acting as a mechanical stop for the secondary air control. This will not
fully close, thus allowing a bleed of air to the fire box to reduce smoke
emissions.
5.1.5 Tertiary Air
All models have tertiary air supply that can be seen working in certain conditions during the
burning period. The outlet for the tertiary air is at the rear of the fire box chamber, located
below the throat plate on the rear of the firebox.
Air is emitted through a series of small holes within this metal chamber.
Tertiary air is employed to provide additional air to the upper areas of the fire box, to
promote additional burning of the unburnt combustion gases and thus ensuring a cleaner
burn emission.
Generally there is no user adjustment required, however if a high flue draw is measured
upon installation, then a slider is fitted to provided control, this would be set by the
installation engineer.
PLEASE NOTE: The tertiary slider is factory set to maximum open (Lever fully to left when
looking at the rear of stove). To adjust, remove the rear heatshield and slacken the 4x nuts,
just enough to allow the slider to move, adjust & retighten nuts and replace the heatshield.
Figure 3. Fully Open Position Figure 4. Reduced / Closed Position
Tertiary Air Inlet
Reduce Tertiary Air
Retaining Nuts X4
