L’ARTISTICO SRL |
EN
28
Cod. 40580 | Rev. 01 | 04/2021
16. SMOKE EXHAUST SYSTEM
The entire smoke exhaust system must comply
with the provisions of the UNI 10683 standard currently
in force in Italy. For all other countries, national and
European regulations must be respected.
IMPORTANT: the type of flue gas exhaust and
its dimensioning (diameter and height) must be
evaluated, built and certified by the qualified
installer on the basis of precise calculations in
relation to the appliance data and the technical
sheets of the flue supplier, in the compliance
with the regulations in force and the indications
of this instruction booklet. It is imperative to
ensure a natural draft (even when cold) so that
in the event of a temporary power failure, the
evacuation of fumes is ensured. Check the data
sheet of each appliance to respect the minimum
necessary draft in Pascal at the rated power and
at the reduced power.
The heat generator works in depression and is equipped with an
outlet fan for the extraction of fumes.
The exhaust system must be unique for the generator, no
discharges into the flue shared with other devices are allowed.
Each appliance must have its own flue with a section equal to or
greater than the diameter of the flue gas exhaust pipe of the
chimney insert.
The flue gas discharge can be realized through a connection to a
traditional flue (chimney) or to an internal or external duct with
insulated or double-walled pipe.
It is necessary to use certified pipes and fittings with adequate
gaskets that guarantee tightness.
The smoke duct and the relative smoke fitting must be equipped
with a regular sign indicating the characteristics as indicated in
the Italian standard UNI 10683.
Clean the smoke duct and its smoke connection at least once a
year.
Below are listed definitions and requirements for the correct
installation of a smoke outlet according to the Italian standard
UNI10683.
CHANNEL or SMOKE FITTING
Definition:
duct or connecting element between the appliance and
the chimney for the evacuation of combustion products.
Technical requirements:
Must not cross rooms where the installation of combustion
appliances is prohibited.
It must be hermetically connected to the heat generator but its
weight must not rest on it.
The use of counter-slope elements is prohibited.
The length of the horizontal section must be minimum and in any
case not greater than 3 m, with a minimum slope of 3% upwards.
The number of direction changes, without the T-piece (in this
case already included in the insert device), must not be greater
than 3.
The smoke duct must have a constant section and allow the
recovery of soot.
It is necessary to provide a "T" fitting with a condensate
collection cap at the base of the vertical section.
If the exhaust does not fit into an existing flue, a vertical section
with a windproof terminal (UNI 10683) is required.
The vertical duct can be internal or external to the building.
If the smoke duct is outside the building, and / or in unheated
attics or attics, it must be strictly insulated.
If the smoke duct is inside the building and its length is> 4
meters, it must be strictly insulated.
The smoke ducts must be prepared with at least one airtight
socket for possible smoke sampling.
All sections of the smoke duct must be accessible for inspection.
Inspection openings must be provided for cleaning.
CHIMNEY
Definition:
vertical duct with the purpose of collecting and expelling
the combustion products coming from a single appliance at a suitable
height from the ground.
Technical requirements:
Be certified for solid fuels.
Be sealed against combustion products, insulated and insulated
according to use.
Be adequately spaced from flammable materials with an air gap
or insulation.
Have preferably circular, constant, free and independent internal
section.
Have walls that are as smooth as possible and without
constrictions; the regular curves and without discontinuity.
It is mandatory that the chimney is equipped with an inspectable
chamber for the collection of solid materials and any
condensation placed under the entrance to the smoke channel.
No other fireplace, stove, boiler, or extractor hood of any kind
must be connected.
It is forbidden to allow other air supply channels and pipes for
plant engineering to pass inside the flue, even if oversized.
The connection in chimneys with a hydraulic diameter greater
than 150 mm is prohibited, in this case an internal ducting must
be performed.
CHIMNEY POT
Definition:
device placed at the top of the chimney to facilitate the
dispersion of the combustion products into the atmosphere.
Technical requirements:
Be shaped to prevent rain, snow and foreign bodies from entering
the chimney / ducted system.
Be built in such a way that, even in the event of winds from any
direction and with any inclination and in all weather conditions, the
evacuation of combustion products is still ensured (windproof
chimney pot).
It must be placed outside the reflux area.
Any buildings or other obstacles that exceed the height of the
chimney pot must not be close to the chimney itself.
It must be free of mechanical suction means.
Examples of correct flue gas exhaust connection: