PHOENIX OVENS Installation & Operation Manual 9
Exhaust Design
NOTE: Because of residual build-up in the flue, it is highly recommended that the flue be
inspected after three (3) months and a cleaning schedule be implemented as required.
Failure to properly maintain the flue, may result in flue failure and fire hazard.
Exhaust Design
The following section is for your guidance in establishing a design to suit your
Exhaust duct design requirements.
Oven exhaust design should be carried out by a qualified, engineering consultant
with knowledge of local authority requirements. The following information is
supplied as a guide. only.
Whichever exhaust system is to be used it is a primary consideration to al-
low access to the complete system that will allow regular cleaning and ser-
vice to the whole exhaust system.
In the case of solid fuel (wood burning) ovens, this is critical consideration
as there may be buid up of creosote and ash which can become a fire haz-
ard.
All Phoenix Ovens utilize a proprietary exhaust design which under normal
operation runs cooler than more conventional oven systems, This eliminates
the need for water sprays and additional “make up air”).
Additionally, Phoenix Ovens are fitted with a mesh filter at the entry to the
exhaust transition. This can be easily accessed by kitchen personal for regu-
lar cleaning. The performance of the filter is monitored by the interlock
system.
Flue Material
Check your local authority requirements. (Generally min 0.9mm Galv. steel or
min 0.55mm S/S). Seams should be triple folded or fully welded.
Also available and highly recommended are a variety of specialised proprietary flue systems including stainless steel
twin and triple skinned products. (Your local mechanical contractor should advise you of available systems)
Phoenix Ovens advices to use best available material and ensure it is installed correctly to comply with local codes.
(for construction, mounting, joining and clearances to combustible materials .
Recommended Flue size
300mm square or equivalent cross-sectional area in round or rectangular section. This can vary depending on fan ca-
pacity etc. Engineering principals should be adhered to. Some jurisdictions will specify exhaust velocity which will
require different calculations to obtain correct sizing.
Nominal airflow required.
150Pa Static Pressure (available at oven transition)
Maximum total flue airflow - 700 litres / second for a single opening.
Maximum total flue airflow - 1000 litres / second for multi-door ovens.
The oven flue can be connected to any exhaust system with a much higher flow rate by controlling the suction utilising
a damper.
Connection to common or community systems should be carefully planned so that solid fuel exhaust is not common
with grease duct. Local authority approval should be obtained.
PHOENIX TRANSITION
WITH ADJUSTABLE
DAMPER
STD. COMMERCIAL
FLUE SYSTEM TO
EXHAUST FAN
BY OTHERS
PHOENIX LINTEL
WITH SPIGOT CONNECTION
AND FOLD DOWN DOOR
AND MESH FILTER
