{"id":160426,"date":"2025-12-12T14:58:31","date_gmt":"2025-12-12T14:58:31","guid":{"rendered":"https:\/\/poliformlucernari.com\/lucernari\/evacuatori-di-fumo-e-calore\/sdf-smaltitore-di-fumo-e-calore\/"},"modified":"2026-02-04T18:45:33","modified_gmt":"2026-02-04T18:45:33","slug":"sdf-smoke-and-heat-ventilator","status":"publish","type":"page","link":"https:\/\/poliformlucernari.com\/en\/skylights\/smoke-and-heat-exhaust-ventilators\/sdf-smoke-and-heat-ventilator\/","title":{"rendered":"SDF – SMOKE AND HEAT VENTILATOR"},"content":{"rendered":"

[vc_row unlock_row_content=”yes” row_height_percent=”40″ override_padding=”yes” h_padding=”7″ top_padding=”0″ bottom_padding=”0″ back_color=”color-xsdn” back_image=”159686″ overlay_color=”accent” overlay_alpha=”20″ gutter_size=”3″ column_width_percent=”100″ shift_y=”0″ z_index=”0″ mobile_visibility=”yes” css_animation=”scroll-trigger” animate_el=”bg” animation_scale_val=”150″ animation_opacity=”100″ animation_x=”0″ animation_y=”0″ animation_blur=”0″ animation_rotate=”0″ animation_perspective=”0″ animation_offset_top=”100″ animation_offset_bottom=”100″ content_parallax=”1″ front_end_with_slider=”true” uncode_shortcode_id=”111989″ back_color_type=”uncode-palette” row_height_pixel=”800″ overlay_color_type=”uncode-palette”][vc_column column_width_percent=”100″ position_vertical=”middle” align_horizontal=”align_center” gutter_size=”2″ override_padding=”yes” column_padding=”4″ font_family=”font-955596″ overlay_alpha=”20″ shift_x=”0″ shift_y=”0″ shift_y_down=”0″ z_index=”0″ medium_width=”0″ mobile_width=”0″ width=”1\/1″ uncode_shortcode_id=”146862″][vc_empty_space empty_h=”5″][vc_empty_space empty_h=”3″][vc_custom_heading text_color=”color-jevc” heading_semantic=”h1″ text_font=”font-150259″ text_size=”custom” text_weight=”900″ text_transform=”uppercase” text_height=”fontheight-161249″ css_animation=”alpha-anim” animation_speed=”1000″ animation_delay=”200″ uncode_shortcode_id=”574335″ heading_custom_size=”clamp(30px,8vw, 50px)” text_color_type=”uncode-palette”]SMOKE AND HEAT VENTILATOR[\/vc_custom_heading][\/vc_column][\/vc_row][vc_row unlock_row_content=”yes” row_height_percent=”40″ override_padding=”yes” h_padding=”7″ top_padding=”0″ bottom_padding=”0″ back_color=”color-xsdn” back_image=”160186″ back_position=”center center” overlay_color=”accent” overlay_alpha=”20″ gutter_size=”3″ column_width_percent=”100″ shift_y=”0″ z_index=”0″ desktop_visibility=”yes” medium_visibility=”yes” css_animation=”scroll-trigger” animate_el=”bg” animation_scale_val=”150″ animation_opacity=”100″ animation_x=”0″ animation_y=”0″ animation_blur=”0″ animation_rotate=”0″ animation_perspective=”0″ animation_offset_top=”100″ animation_offset_bottom=”100″ content_parallax=”1″ front_end_with_slider=”true” uncode_shortcode_id=”207646″ back_color_type=”uncode-palette” row_height_pixel=”800″ overlay_color_type=”uncode-palette”][vc_column column_width_percent=”100″ position_vertical=”middle” align_horizontal=”align_center” gutter_size=”2″ override_padding=”yes” column_padding=”4″ font_family=”font-955596″ overlay_alpha=”20″ shift_x=”0″ shift_y=”0″ shift_y_down=”0″ z_index=”0″ medium_width=”0″ mobile_width=”0″ width=”1\/1″ uncode_shortcode_id=”146862″][vc_empty_space empty_h=”5″][vc_empty_space empty_h=”3″][vc_custom_heading text_color=”color-jevc” text_font=”font-150259″ text_size=”custom” text_weight=”900″ text_transform=”uppercase” text_height=”fontheight-161249″ css_animation=”perspective-words” animation_speed=”1000″ animation_delay=”200″ uncode_shortcode_id=”466327″ heading_custom_size=”clamp(30px,8vw, 50px)” text_color_type=”uncode-palette”]SMOKE AND HEAT VENTILATOR[\/vc_custom_heading][\/vc_column][\/vc_row][vc_row row_height_percent=”0″ override_padding=”yes” h_padding=”2″ top_padding=”3″ bottom_padding=”3″ back_color=”accent” back_image=”160085″ overlay_alpha=”50″ gutter_size=”3″ column_width_percent=”100″ shift_y=”0″ z_index=”0″ content_parallax=”0″ uncode_shortcode_id=”185891″ back_color_type=”uncode-palette”][vc_column column_width_percent=”100″ position_vertical=”middle” align_horizontal=”align_center” gutter_size=”3″ override_padding=”yes” column_padding=”1″ overlay_alpha=”50″ shift_x=”0″ shift_y=”0″ shift_y_down=”0″ z_index=”0″ medium_width=”0″ mobile_width=”0″ width=”1\/1″ uncode_shortcode_id=”165113″][vc_custom_heading text_color=”color-xsdn” text_font=”font-150259″ text_size=”custom” text_weight=”900″ text_transform=”uppercase” text_height=”fontheight-161249″ uncode_shortcode_id=”965964″ heading_custom_size=”clamp(30px,8vw, 50px)” text_color_type=”uncode-palette”]SDF<\/p>\n

[\/vc_custom_heading][\/vc_column][\/vc_row][vc_row unlock_row_content=”yes” row_height_percent=”0″ override_padding=”yes” h_padding=”7″ top_padding=”4″ bottom_padding=”5″ back_color=”color-xsdn” overlay_alpha=”50″ gutter_size=”3″ column_width_percent=”100″ shift_y=”0″ z_index=”0″ content_parallax=”0″ uncode_shortcode_id=”168874″ back_color_type=”uncode-palette” row_height_pixel=”300″][vc_column column_width_percent=”100″ position_vertical=”middle” gutter_size=”3″ override_padding=”yes” column_padding=”3″ expand_height=”yes” back_color=”color-xsdn” overlay_alpha=”50″ shift_x=”0″ shift_y=”0″ shift_y_down=”0″ z_index=”0″ medium_width=”0″ mobile_width=”0″ width=”1\/1″ uncode_shortcode_id=”119566″ back_color_type=”uncode-palette”][vc_custom_heading text_color=”color-jevc” text_font=”font-150259″ uncode_shortcode_id=”102594″ text_color_type=”uncode-palette”]DIFFERENCES BETWEEN SMOKE AND HEAT VENTILATORS[\/vc_custom_heading][vc_column_text uncode_shortcode_id=”220144″]Fire protection measures for smoke and heat control are implemented through design and, consequently, through the application of systems for Smoke and Heat Evacuation or Smoke and Heat Venting, as well as for the removal of combustion products.<\/p>\n

Essentially, there are three types of approaches:[\/vc_column_text][vc_column_text text_lead=”yes” uncode_shortcode_id=”131866″]EMERGENCY SMOKE AND HEAT VENTING
\nNATURAL EVACUATION
\nFORCED EVACUATION[\/vc_column_text][vc_column_text uncode_shortcode_id=”649419″]The designer, in accordance with the provisions of Chapter S8 of the \u201cNew Fire Prevention Code \u2013 Ministerial Decree 18\/10\/2019,\u201d may, depending on the required performance class, request the application of:<\/p>\n

Natural or forced smoke and heat exhaust ventilators,or<\/p>\n

Smoke and heat ventilators.<\/p>\n

Performance classes:<\/p>\n

Performance level I \u2013 No requirements<\/p>\n

Performance level II \u2013 Smoke and heat generated by a fire must be removable from compartments in order to facilitate the operations of rescue teams.
\nPerformance level III \u2013 A smoke-free layer must be maintained within the compartment to allow:<\/p>\n

protection of occupants and rescue teams;<\/p>\n

protection of assets, if required;<\/p>\n

prevention of the spread of smoke and heat generated within the compartment to adjacent compartments.
\nA. Natural Smoke and Heat Exhaust Ventilator (ENFC) (CE marking required)<\/p>\n

Within a natural smoke and heat exhaust system, an ENFC may feature a hinged opening up to 165\u00b0 or louvered blades.
\nThe certified smoke exhaust capacity, expressed in square meters, is known as SUA (Aerodynamically Effective Area).<\/p>\n

The application of a natural smoke exhaust ventilator designed in accordance with UNI 9494-1\/2017 allows the creation of a smoke-free layer and therefore the control of the spread of smoke and hot gases during a fire, primarily ensuring the safety of occupants and subsequently the protection of property.
\nB. Forced Smoke and Heat Exhaust Ventilator (EFFC) (CE marking required)<\/p>\n

This is essentially a propeller fan; performance is calculated volumetrically, i.e. in cubic meters per hour (m\u00b3\/h) extracted.<\/p>\n

The application of a forced smoke exhaust ventilator designed in accordance with UNI 9494-2\/2017 allows the creation of a smoke-free layer and therefore the control of smoke and hot gas spread during a fire, ensuring first the protection of occupants and then the safeguarding of assets.
\nThis system is typically used in small retail spaces or in locations not connected to roofs and walls.
\nC. Smoke and Heat Ventilator (SDF)<\/p>\n

The smoke and heat ventilator in accordance with Annex G of UNI 9494-1\/2017 is fully comparable to an ENFC.
\nThis type of ventilator is used when the creation of a smoke-free layer is not required, but rather to allow fire brigades (VV.FF.) to vent smoke during intervention in order to access the premises and extinguish the fire.<\/p>\n

The smoke ventilator category originates within Chapter S8, which defines the following types of use:
\nTYPE OF USE<\/p>\n

SEa Permanently open<\/p>\n

SEb Equipped with an automatic opening system activated by a fire detection system (IRAI)<\/p>\n

SEc Provided with closing elements (e.g. windows, frames, etc.) with controlled opening from a marked and protected position<\/p>\n

SEd Provided with non-permanent closing elements (e.g. windows, frames, etc.) that can also be opened from an unprotected position
\nSEe Provided with permanent closing elements (e.g. PMMA polymer sheets, polycarbonate, etc.) allowing opening under actual fire conditions (e.g. thermal conditions generated by a natural fire sufficient to melt the closing element) or immediate demolition by rescue teams.
\nIf we analyze, for example, type SEc, the description allows for the use of virtually any type of window or frame.
\nOver time, the market has seen the development of \u201csmoke ventilators\u201d measuring up to 2.50 \u00d7 10.00 m (obviously not CE-marked), as the interpretation by designers and fire brigades has been that it is sufficient to guarantee the geometric air passage area in plan view of the opening.
\nIt should be noted that a smoke ventilator is not dimensioned according to a specific standard or design calculation, but rather based on a table contained within the decree (Chapter S8), where the designer simply verifies the fire load of the environment and demonstrates that the chosen smoke ventilators\u2014whether windows, pseudo-exhaust units, large openings, etc.\u2014are suitable to expel smoke during fire brigade intervention.
\nTherefore:
\nA smoke and heat ventilator, intended exclusively to expel smoke and combustion gases only during fire brigade intervention, may simply be (depending on the type of use) a window or a basic plastic skylight.<\/p>\n

Under these conditions, market demand often refers\u2014at best\u2014to the type of use (see table above, e.g. SEc, SEb, etc.), with dimensions that usually exceed those that can be certified.
\nFor this reason, it would always be advisable to refer to smoke ventilators as exhaust ventilators, both in terms of dimensions and certification.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

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