Komfovent Multi Smoke Ducts Installation Manual

Introduction

The smoke duct and valve system is designed for smoke, hot air, and gas extraction during a fire. This creates a safe zone for evacuation and facilitates firefighting operations. Komfovent smoke ducts are used for smoke protection in one or more rooms (fire zones) and can be part of a general smoke extraction system.

Komfovent smoke ducts comply with the following standards:

• LST EN 12101-7:2011 “Smoke and heat control systems. Part 7: Smoke duct sections.”
• LST EN 1366-9:2008 “Fire resistance tests for building components – Part 9: Smoke control ducts for single compartments.”

Smoke ducts are classified according to LST EN 13501-4:2007 “Fire classification of construction products and building elements – Part 4: Classification using data from fire resistance tests on components of service installations.”

Technical Data:

• EI 60 – fire resistance 60 minutes.
• EI 120 – fire resistance 120 minutes.
• ve – suitable for vertical use.
• ho – suitable for horizontal use.
• i↔o – meets criteria when fire is inside or outside the duct.
• o→i – meets criteria when fire is outside the duct.
• S1500 – smoke tightness tested under vacuum at a pressure of -1500 Pa.
• Maximum overpressure: +500 Pa.
• Made from non-combustible materials conforming to A1 fire class.

Cold-rolled and chemically passivated DX51D+Z275 steel is used for manufacturing rectangular duct components. Both sides of the sheet are coated with a zinc layer of 275 g/m². The thickness of the galvanized steel sheet is 0.9 mm. Rectangular sections have flanges with pre-drilled holes for screw connections. The flange profile is 30 mm high. Connection points are sealed with fire-resistant mastic certified for fire resistance. To ensure rigidity, a special fastening and stiffening method is used. All smoke ducts are insulated with 60 mm thick fire-resistant wool.

Smoke Duct Installation

General Installation Guidelines:

• Each smoke system element must be secured with separate brackets and installed so that its weight is not transferred to other connected devices or components.
• Use galvanized screws, nuts, and supports to avoid galvanic corrosion between metal parts.
• Installation of any duct system must be performed by a qualified installer. Qualified specialists are individuals with sufficient professional experience and knowledge of smoke extraction systems, their installation, and project requirements, who can work safely without endangering themselves or others.

2.1. Connecting Smoke Ducts

Rectangular smoke ducts are connected using "L" profile flanges. The flange height is 30 mm and is marked as L-30. Kerafix 2000 gasket (30 × 6 mm) must be used between the flanges to ensure airtightness. It is recommended to use the gasket in one piece. The gasket should be applied to both flange connections. Corner connections are tightened with screws, and side connections are secured with universal clamps.

Figure 1: Example of flange connection tightening and sealing: 1 – screw with washer M10, 2 – glued Kerafix 2000 gasket (30 × 6 mm), 3 – nut with washer M10

Universal clamps are used for connecting smoke ducts. The distance between the wool insulation and the flange at the ends of the smoke duct sections is not uniform, which is intended for phased system installation where a place for the clamp screw is provided in one section. To ensure airtightness, clamps should be placed no more than 180 mm apart. The distance from the clamp to the flange corner (max. 150 mm) should also be considered.

Figure 2: Example of using universal clamps

Flanges at corners are tightened with M10 screws. All connecting nuts should be on one side of the flange. In hard-to-reach areas where universal clamps cannot be used, smoke ducts are connected using C-profiles attached to the flange edges.

Figure 3: Connecting smoke ducts using C-profile: 1 – screw, 2 – C-profile for flange connection, 3 – adhesive gasket

The connection points of the smoke ducts must be insulated with fire-resistant wool. 60 mm wide strips are placed around the flange perimeter, and 180 mm wide strips are placed on top and secured with special spring screws.

Figure 4: Insulation of smoke duct connection points

2.2. Installing Smoke Ducts

The smoke duct system can be attached to ceilings, walls, columns, beams, etc. The mounting system must be designed so that the weight of the smoke ducts is not transferred to the duct connections (flanges). Various fasteners are used depending on the suspension method and the size of the smoke duct.

Figure 5: Smoke duct mounting elements: 1 – profiles, 2 – support brackets

All smoke duct elements must be hung on profiles (e.g., U-profile 30 × 30 × 3 mm) or brackets. Profiles are used for attaching ducts to horizontal surfaces (e.g., ceilings), and brackets are used for attaching to vertical surfaces (e.g., walls). Profiles are attached to ceilings with threaded rods M10, and brackets are fixed with anchor screws. When installing horizontal duct systems, the distance between support points/brackets must not exceed 1150 mm. Only one smoke duct element can be between support points/brackets.

Figure 6: Example of smoke duct fastening

Vertical smoke ducts are installed in floor slabs (see "Installing Smoke Ducts in Floor Slabs"), provided the distance between slabs does not exceed 5 meters. Longer vertical smoke duct systems must also be secured to walls, columns, or other designated building structures.

2.3. Installing Smoke Ducts in Partitions

Figure 7: Installation in a partition

Prepare an opening in the wall (8) and insert the smoke duct segment (1). Seal the gap around the perimeter with 60 mm fire-resistant wool strips (2), with the same width as the partition thickness. Apply expanding fire-resistant sealant (10) (e.g., “Promaseal-LPC” 2×20) to the edges of the mineral wool along the entire outer and inner perimeter. If the opening edges cannot be sealed with fire-resistant wool due to the building's structural properties, fire-resistant sealants or mortars can be used.

Cut the wool insulation along the entire perimeter of the smoke duct at a distance of 60 mm from the partition. Remove the cut wool insulation part (3).

Apply fire-resistant adhesive to the wool seal (heat resistance up to 1000 °C, class A1).

Use horizontal metal profiles (DSKP) (4) for fastening the smoke duct.

Attach the metal profiles (L30x30x2) (4) to the inner part of the smoke duct with self-tapping screws. Screw vertical corner profiles (5) to the edges of the smoke duct.

Attach the horizontal metal profiles (4) to the partition with screws intended for the respective wall structure.

Further insulate the opening from all sides with 60 mm thick wool strips (6) (the insulation must completely cover the metal profiles).

Attach the insulation to the partition with screws and washers intended for the appropriate wall structure.

Place 60 × 60 mm fire insulation strips (7) around the entire perimeter of the smoke duct.

Attach the insulation strips with specialized spring screws.

Cover the exposed edges of the insulation with black 110 mm wide tape (9). Install the construction frame (8) so that its top edge almost aligns with the top of the smoke duct insulation.

Place the metal mounting profiles (3) onto the construction frame and under the flange connection. Place another duct segment onto the secured segment (2). Connect the segment flanges as described in the “Connecting Smoke Ducts” section and screw the mounting profiles to the connection corners with screws (3). Do not insulate the connection yet.

Adjust the height of the construction frame so that the mounting profiles (3) can support the weight of the smoke duct system. Screw the profiles (3) to the construction frame with screws.

Insulate the flange connections above and below the slab as described in the “Duct Connections” section.

If the distance between the slab panels exceeds 5 m, additionally secure the vertical smoke duct system similarly to walls, columns, or other structures using suspension beams or brackets.

Flange connections of smoke ducts must be located above or below the slab. Connecting duct segments directly in the slab opening is prohibited.

2.4. Installing Smoke Ducts in Floor Slabs

Prepare an opening in the slab (1) and insert the smoke duct segment (2).

Insert mounting profiles under the flange connection between segments (3). Connect the flange connections as described in the “Connecting Smoke Ducts” section and screw the mounting profiles to the corners of the flange connection with screws (3). Do not insulate the connection yet.

Attach the mounting profiles (3) to the slab using anchor screws and threaded rods (4).

Insulate the gap around the smoke duct from all sides with 30 mm fire-resistant wool strips (5), with the same width as the slab thickness. Apply expanding fire-resistant sealant (10) (e.g., “Promaseal-LPC” 2×20) to the edges of the mineral wool along the entire outer and inner perimeter. If the opening edges cannot be sealed with fire-resistant wool due to the building's structural properties, fire-resistant sealants or mortars can be used.

Apply fire-resistant adhesive to the wool seal (heat resistance up to 1000 °C, class A1).

Further insulate the opening from all sides with 180 mm thick wool strips (6) (the insulation must completely cover the metal profiles).

Attach the wool insulation strips to the smoke duct with special spring screws.

2.5. Connecting Fittings, Bends, and Offset Pieces

Various accessories such as bends, transitions, and offsets are used to change the direction or orientation of smoke ducts. Fittings are attached to smoke duct sections using flange connections, as described in the “Connecting Smoke Ducts” section.

Figure 7: Smoke duct modifications: 1 – T-piece, 2 – bend, 3 – side transition

2.6. Installing Smoke Extraction Openings

Smoke extraction openings are installed in locations where they are most effective in case of fire. Bends and transitions are used to create smoke extraction openings, installed at the end of the smoke duct. If the smoke duct does not continue beyond the extraction opening, it must be tightly sealed (e.g., with a blind flange).

• Smoke extraction openings and valves must be installed no closer than 500 mm from obstacles that may obstruct smoke extraction (partitions, columns, or similar building structures).
• A smoke valve (with the same or higher fire resistance than the smoke duct) must be installed in the smoke exhaust, connected to the duct with a flange connection.
• Smoke valves must be installed according to the manufacturer's installation instructions.
• Smoke valves and their flange connections must be insulated with fire-resistant mineral wool strips up to the vertical or horizontal boundary structure where the valves are installed.

Figure 8: Example of a smoke extraction opening: 1 – smoke duct, 2 – T-piece, 3 – end cap, 4 – smoke valve, 5 – partition

All component flange connections are connected and insulated as described in the “Duct Connections” section.

3. TRANSPORTATION AND STORAGE

Smoke ducts are transported using standard transport vehicles, loaded and secured to prevent deformation or damage during transport. The vehicle must be covered to protect the ducts from weather conditions or dust.

For long-term storage, smoke ducts should be stored in a dry place, additionally protected from direct sunlight and dust (e.g., covered with film).

Before installation at the construction site, sections must be unloaded onto a prepared base or structures located at least 20 cm above the ground. The product must be protected from environmental influences until installation (rain, snow, debris, dust).

4. MARKING AND DOCUMENTATION

Each certified smoke system element is marked with a CE label.

Figure 9: Smoke duct marking

The installation company that installs the smoke extraction system guarantees that the smoke extraction system is installed in accordance with the installation instructions and completes the installation certificate.

Installation Certificate Example

Object:

Address:

Installer/Company (name, address, phone number):

Identification data of the installation site(s) (building part, floor(s), room(s), etc.):

Separate installation certificates can be filled out for building parts, slabs, etc.

Installation Date (start/end) (YYYY-MM-DD/YYYY-MM-DD):

Smoke System Duct Classification:

Smoke ducts are installed according to the installation instructions (check the correct option): [ ] Yes [ ] No

Materials Used:

Smoke Duct System (manufacturer, dimensions, airtightness, class, other data):

* Notes on products used:

Installer/Company:

Technical Supervision Representative:

*If there are no comments, indicate “No comments”.

5. INSTALLED SYSTEM INTERNAL INSPECTION CHECKLIST

The installed smoke ducts are subject to periodic inspection once a year. During the maintenance, the smoke duct system is checked according to the table below.

Other notes:

Smoke Extraction Duct System Identification:

Inspection Date:

Maintenance Performed:

Company:

Address:

Phone Number:

Signature:

Service and Support Partners

LITHUANIA

UAB KOMFOVENT
Phone: +370 5 200 8000
service@komfovent.com
www.komfovent.com

FINLAND

Komfovent Oy
Muuntotie 1 C1
FI-01 510 Vantaa, Finland
Phone: +358 20 730 6190
toimisto@komfovent.com
www.komfovent.com

GERMANY

Komfovent GmbH
Konrad-Zuse-Str. 2a,
42551 Velbert, Deutschland
Phone: +49 0 2051 6051180
info@komfovent.de
www.komfovent.de

LATVIA

SIA Komfovent
Bukaišu iela 1, LV-1004 Riga, Latvia
Phone: +371 24 66 4433
info.lv@komfovent.com
www.komfovent.com

SWEDEN

Komfovent AB
Ögärdesvägen 12A
433 30 Partille, Sverige
Phone: +46 31 487 752
info_se@komfovent.com
www.komfovent.se

UNITED KINGDOM

Komfovent Ltd
Unit C1 The Waterfront
Newburn Riverside, Newcastle upon
Tyne NE15 8NZ, UK
Phone: 0191 429 4503
info_uk@komfovent.com
www.komfovent.com

PARTNERS

AT
J. PICHLER Gesellschaft m. b. H.
www.pichlerluft.at

BE
Ventilair group
ACB Airconditioning
www.ventilairgroup.com
www.acbairco.be

CZ
REKUVENT s.r.o.
www.rekuvent.cz

CH
WESCO AG
SUDCLIMATAIR SA
CLIMAIR GmbH
www.wesco.ch
www.sudclimatair.ch
www.climair.ch

DK
Øland A/S
www.oeland.dk

EE
BVT Partners
www.bvtpartners.ee

FR
ATIB
www.atib.fr

HR
Microclima
www.microclima.hr

HU
AIRVENT Légtechnikai Zrt.
Gevent Magyarország Kft.
Merkapt
www.airvent.hu
www.gevent.hu
www.merkapt.hu

IE
Lindab
www.lindab.ie

IR
Fantech Ventilation Ltd
www.fantech.ie

IS
Blikk & Tækniþjónustan ehf
Hitataekni ehf
www.bogt.is
www.hitataekni.is

IT
ICARIA
www.icaria.srl

NL
Ventilair group
DECIPOL-Vortvent
CLIMA DIRECT BV
ForClima BV
www.ventilairgroup.com
www.vortvent.nl
www.climadirect.com
www.forclima.nl

NO
Ventilution AS
Ventistål AS
Thermo Control AS
www.ventilution.no
www.ventistal.no
www.thermocontrol.no

PL
Ventia Sp. z o.o.
www.ventia.pl

SE
Nordisk Ventilator AB
www.nordiskventilator.se

SI
Agregat d.o.o
www.agregat.si

SK
TZB produkt, s.r.o.
www.tzbprodukt.sk

UA
TD VECON LLC
www.vecon.ua