Mcz AirSystem 70 DX User Manual download pdf (Page 9)

Chapter 2

INSTALLATION AND USE MANUAL

page 9

2.5.1. Examples of flue pipes

Square or rectangular section flue pipes must have rounded internal

corners with radius not less than 20mm. For the rectangular section,

the ratio between internal dimensions must be ≤1.5.

The recommended section for a flue pipe according to its length is

listed in the table below:

Height (m) Section (cm²)

From 3.5 to 5 m

900 (30x30 cm or ∅ 30 cm)

From 5 to 7 m

625 (25x25 cm or ∅ 25 cm)

Over 7 m

400 (20x20 cm or ∅ 20 cm)

N.B. Too small or too large a section reduces draught and insulation.

For special sections, or section or path variations, functional smoke

exhaust inspections must be conducted as per UNI 9615.

The smoke duct should be equipped with a solid material collection

chamber at the mouth of the smoke duct to be easily opened with an

airtight door.

IMPORTANT !

If in doubt about your flue pipe operations or if its

dimensions are different from those recommended,

we highly suggest an authorised MCZ technician

inspect and measure flue pipe performance (via

micro-gauge measurements)

MCZ s.p.a. shall not be held liable for poor operation

of the fireplace stove that is due to a flue pipe of

improper size or installation that does not comply

with provided requirements.

AISI 304 stainless steel flue

pipe with dual chamber

insulated with ceramic wool

or equivalent resistant to

400°C.

EXCELLENT

Flue pipe in refractory brick

with insulated double wall and

external coat of cement mix

lightened with honeycomb

material such as clay.

GOOD

Traditional square section

clay flue pipe with insulating

hollow inserts.

GOOD

Avoid flue pipes with internal

rectangular sections whose

larger side is double the smaller

such as 20x40 or 15x30.

AVERAGE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 36 37

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Mcz AirSystem 70 DX User Manual Page 9

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