LPCB LPS 1531 installer approval
Scope: Appendix 5 fire rated ductwork systems; Appendix 6 fire resisting dampers.
- Certificate
- 1654PI, issue 02
- Standard
- LPS 1531: Issue 1.2
- Issued
- 27 Feb 2024 (first 14 May 2021)
- By
- BRE Global Ltd
Cover sheet
Technical submission · Q20293-IFS-DS-TS-001 · Rev 00
60 Queen Victoria St
Fire Resistant Ductwork to BS EN 1366-8 & 9. To supply and install fire resistant smoke extract ductwork for 120 min integrity & insulation.
Phoenix MEclient
25 Aug 2026date of issue
P. Fachoriginator
IFS-DSsystem, BS EN 1366-8 & 9
Accredited & certified
Document transmittal
- From
- Imperial Ductwork Services Ltd
- To
- Phoenix ME
- Equipment
- Fire Resistant Ductwork
- Ref
- Q20293-IFS-DS-TS-001
- Date
- 25 August 2026
- Manufacturer
- Imperial Ductwork Services Ltd
To supply and install Fire Resistant Smoke Extract Ductwork manufactured to BS EN 1366 Part 8 & Part 9 for 120 min Integrity & Insulation.
- Specification ref
- Not stated on the transmittal
Note: In the absence of technical submittals being returned within 15 days from issue indicating a formal approval status, IDSL will proceed to mitigate any further delay based on acceptance of this technical submittal.
Supporting documentation issued
(i)Equipment Specifying Schedule
(ii)Manufacturers Data
(iii)Design Check Calculations
(iv)Certified Performance Levels
(v)QA / QC Documents
(vi)Sample Enclosed
(vii)Builders Work Requirements
(viii)Assembly & Installation Details
(ix)O&M Instructions
(x)List of Recommended Spares
(xi)Deviation Schedule
(xii)Other
Approvals
| Party | Sign | Date |
|---|---|---|
| M&E Contractor | ||
| Main Contractor | ||
| Services Consultant |
Use the approval response at the end to return your status.
02 · Product description
The IFS-DS system
Following a substantial investment programme, Imperial Ductwork Services Limited are delighted to propose the IFS-DS fire resistant ductwork system, for single compartment smoke control ducts, multi-compartment duct systems and ventilation ducts, including kitchen extract systems.
Single compartment ducts are tested to BS EN 1366-9:2008. They passed at pressure level 3 (−1500 Pa ambient, −500 Pa under fire), achieving a 2 hour classification (E600 120) without losing cross-sectional area or exceeding a leakage rate of 5 m³/h/m³.
Multi-compartment ducts give the same level of performance but are tested to BS EN 1366-8, achieving EI 120.
Tested with a range of components, the systems cover a direct field size range up to 1250 × 1000 mm or Ø1000 mm under BS EN 1366-1 and BS EN 1366-9, classified to BS EN 13501-4.
IDSL hold third party accreditation for installing fire-resistant ductwork and dampers under BRE LPS 1531, and Warrington Fire FIRAS for installing fire-resistant ductwork systems.
The system supplied and installed by IDSL with Imperial Fire Solutions will be classified to BS EN 13501-3 for ventilation ducts and BS EN 13501-4 for smoke control ducts. Where applicable, ducts will carry the relevant CE / UKCA mark.
1250×1000mm smoke control ducts
2500×1250mm ventilation ducts
Ø1000mm circular
Level 3−1500 Pa ambient, −500 Pa fire
EFR-2501-0452 · 1812-CPR-2293 · 2822-UKCA-CPR-0235Formal test & performance criteria
| Test standard | Duct type | Field (size) | Classification | Classification standard |
|---|
Reading a classification: tap each part.
03 · Project scope
60 Queen Victoria St
Cundall mechanical services drawings, marked up by IFS to show the fire resistant smoke extract ductwork in scope.
04 · Test classifications
Test classifications
Two Efectis France classification reports (notified body 1812) to EN 13501-4:2016.
Classification · horizontal & vertical smoke exhaust ducts
E I 120 (ve ho) S −1500/+500 Pa Multi
Rectangular four-sided smoke exhaust ducts in galvanised steel insulated with ISOVER mineral wool. Inner section 0 × 0 up to 1250 × 1000 mm (w × h), vertical and horizontal.
- Delivered
- 24 March 2025
- Sponsor
- Imperial Ductwork Services Ltd
- Laboratory
- Efectis France, Maizières-lès-Metz
- Signed
- C. Salsi / R. Stouvenot
Reference of the fire tests
| Test number | Lab | Date | Standard |
|---|---|---|---|
| EFR-22-003538 | Efectis FR | 06/10/2023 | EN 1366-1:2014 |
| EFR-22-003497 | Efectis FR | 08/06/2023 | EN 1366-1:2014 |
| EFR-22-003559 | Efectis FR | 10/01/2024 | EN 1366-1:2014 |
| EFR-22-003554 | Efectis FR | 17/11/2023 | EN 1366-1:2014 |
| EFR-22-003562 | Efectis FR | 04/04/2024 | EN 1366-8:2004 |
Horizontal duct: galvanised steel§6.2.1
- Galvanised steel sheet, max. segment length 1340 mm, 1 mm thick. Leakage class C to EN 1507.
- Slide-on flanges or continuous girth flanges (30 mm), Ø10 mm holes in the corners. Slide-on flanges fixed with HENROB R50743CH06 self-pierce rivets Ø5 × 7.5 mm at 150 mm centres; CGF fixed by stitching.
- Joined with M10 × 30 mm screws and nuts in the corners and joint bolt clamps at max. 150 mm centres.
- Flange face: TPIN153SWH (ARBOSEAL) intumescent tape 15 × 3 mm plus a bead of Product 58 acrylic mastic.
Horizontal duct: reinforcement§6.2.2
- Segments ≥ 800 mm: external L stiffeners 50 × 40 × 1.6 mm at mid-length, Ø4.8 × 16 mm rivets at max. 150 mm.
- Internal stiffeners: M10 rod in a Ø21 mm conduit sleeve through the full height, with 75 × 3 mm plate washers inside and out.
- ≥ 800 mm: one stiffener at each extremity (330 mm from edge), two at mid-length, one at each quarter length and mid-width. ≤ 800 mm: one at each extremity and one at mid-length/mid-width.
Horizontal duct: supports & insulation§6.2.3–6.2.4
- Unprotected hangers at max. 1100 mm: L 50 × 50 × 5 mm bearer under the duct, two M10 rods at Lduct + 50 mm.
- Two layers of ULTIMATE U Protect Slab 4.0 Alu1 (ISOVER), 60 mm each at 65 kg/m³ (120 mm total), 175 mm joint offset.
- Stud-welded pins Ø3 × 64 mm (1st layer) and Ø3 × 132 mm (2nd layer), Ø30 mm washers, max. 285 mm spacing. ISOVER Fire Screws 200 mm at corners, max. 285 mm. 90 mm aluminium tape on edges and joints.
Horizontal duct: wall penetration§6.2.1 (wall)
- Opening (w + 100) × (h + 100) mm through a group A plasterboard wall to EN 1363-1:2020, EI 120: 130 mm thick, 2 × 15 mm type F boards each side, 70 mm mineral wool at 90 kg/m³, steel studs.
- Gap max. 50 mm filled with ISOVER slab 65 kg/m³, 60 mm, covered with Protect BSF; first insulation layer glued to the wall with Protect BSK.
Vertical duct§6.3
- Same 1 mm galvanised construction and flanges as horizontal. Exposure i→o: TPIN153SWH tape plus Product 58; exposure o→i: KERAFIX 2000 (CH Materials) tape 20 × 3 mm.
- Segments ≥ 800 mm: external 50 × 40 × 1.6 mm stiffeners at mid-length; one internal M10 stiffener at mid-height/mid-width per segment and two per segment junction.
- Insulation: one layer of ULTIMATE U Protect Slab 4.0 Alu1, 100 mm, 65 kg/m³, pins Ø3 × 114 mm at max. 260 mm (largest sides) and 190 mm (smallest sides). Cover strips 300 × 40 mm, or a 40 mm × 1500 mm sleeve each side of the slab, pinned with Ø3 × 155 mm at max. 285 mm.
- Slab penetration: opening (w + 100) × (h + 100) mm through 150 mm aerated concrete at 550 kg/m³; 50 mm gap filled with 60 mm ISOVER slab and Protect BSF; glued with Protect BSK. Fixed both sides with 40 × 40 × 4 mm steel corners, rivets at max. 100 mm and Ø7.5 × 120 mm concrete screws at max. 100 mm.
- Connection between two ducts made as the duct body; secondary duct fixed with Ø4.8 × 16 mm stainless rivets at max. 150 mm.
Direct field of application§8
- Rectangular four-sided ducts. Horizontal results apply to vertical ducts with ho/ve classification to 13501-3, tested horizontally to EN 1366-8.
- Pressure: result at −500 Pa in duct A applies from −500 to +500 Pa if integrity is met in the duct B test.
- Sizes up to 1250 × 1000 mm (EN 1366-8:2024 §13.3).
- Vertical ducts: any number of storeys if supports are ≤ 5 m apart and the 8:1 buckling ratio is met.
- Supports in steel, stressed no higher than the table below. Expect about 40 mm elongation for unprotected 1.5 m hangers. Flexible and rigid supporting constructions covered.
| Max. stress (N/mm²) | t ≤ 60 | 60–120 | 120–240 min |
|---|---|---|---|
| Tensile, vertical components | 9 | 6 | 3 |
| Shear, screws class 4.6 (EN ISO 898-1) | 15 | 10 | 5 |
Appendix drawings
Classification · horizontal single compartment smoke extraction ducts
E600 120 (ho) S Mono
−1000 / +500 Pa with access doors and/or VCDs · −1500 / +500 Pa without components. 0.8 mm galvanised steel, inner section 0 × 0 to 1250 × 1000 mm.
- Delivered
- 2 October 2025
- Sponsor
- Imperial Ductwork Services Ltd
- Laboratory
- Efectis France, notified body 1812
- Signed
- C. Salsi / R. Stouvenot
Reference of the fire tests
| Test | Lab | Date | Conditions | E | S |
|---|---|---|---|---|---|
| Pr-24-3.002-En | PAVUS | 14/05/2024 | EN 1366-9:2008, −300 Pa, 600 °C | 134 min | 134 min |
| Pr-24-3.004-En | PAVUS | 14/05/2024 | EN 1366-9:2008, −300 Pa, 600 °C | 134 min | 134 min |
Galvanised steel duct§6.2.1
- GALV-DX51D+Z275-M-A-CE (ArcelorMittal UK), 0.8 mm, max. segment length 1500 mm.
- 1500 mm: single sheet folded four times, grooved corner seam, beaded cross sections. 1340 mm: single sheet in CGF unit, notched seam flange. ≤ 1340 mm: two sections with a Pittsburgh lock seam. Product 58 inside along all lock forms.
- Slide-on: VM30 VerroMax flange (Doby Verrolec) 30 × 30 × 1 mm with VM30C corners 96 × 96 × 3 mm, HENROB rivets Ø5 × 7.5 mm at max. 150 mm, tack-welded corners, sealed with Product 58.
- Joined with M10 × 30 mm bolts and VGFC R5 type G clamps (4 mm, M8 bolts) at max. 200 mm; TPIN153SWH gasket 15 × 13 mm between flanges.
Reinforcement & compensator§6.2.2–6.2.3
- Segments over 750 mm: DVS2 'S' type stiffener frame (Doby Verrolec) 1.6 mm, L 20 × 30 mm, corners 106 × 106 mm, at mid-length with Ø4.8 × 16 mm rivets at max. 150 mm. Omitted on segments with an access panel.
- One FFDM compensator (MANDIK), 155 mm, at mid-length of the 9400 mm duct in the unexposed part.
Supports & wall penetration§6.2.4–6.2.5
- Unprotected hangers at max. 1500 mm: CSS41/S/2.5 channel 41 × 41 × 2.5 mm, length Wduct + 150 mm, open side down; two M10 rods 50 mm from each side, 40 × 40 × 3 mm lipped washers.
- Opening Øduct + 100 mm through aerated concrete, min. 450 kg/m³, min. 150 mm; max. 50 mm gap filled with 50 mm mineral wool at min. 100 kg/m³.
Optional components (−1000 / +500 Pa)§6.2.6
- Dampers: SEDS-L (MANDIK); HVC-VCD aluminium VCD (HVC Supplies) with VM30 flange; Advanced Air 1500 Series. All bolted M10 × 30 mm with VGFC R5 clamps at 200 mm and TPIN153SWH gasket.
- Access doors: FTDAD (Ace Filtration) 450 × 450 × 25 mm or ADTR45 (Doby Verrolec) 450 × 450 × 30 mm, edges sealed with Product 58.
Direct field of application§8
- All temperatures below 600 °C, same duration, same pressure level.
- Horizontal single compartment ducts up to 1250 × 1000 mm internal (EN 1366-9:2024 §13.2). For sizes over 1000 × 250 mm, hanger rod stress ≤ calculated test values.
- −1000 / +500 Pa with access doors or VCDs; −1500 / +500 Pa without components.
- Vertical parts in a single compartment are covered by the horizontal test; their weight must be allowed for in the suspension design.
Appendix drawings
05 · Certificate of Constancy of Performance
1812-CPR-2293
Efectis France · notified body 1812
Revision 25-0 · Regulation (EU) 305/2011 (CPR)
- Product
- Smoke and heat control systems: smoke duct sections
- Reference
- IFS-DS
- Placed on market by
- Imperial Ductwork Services LtdSargasso, Five Arches Business Estate, Maidstone Road, Sidcup, Kent DA14 5AE
- Manufacturing plant
- Dartford & Erith, UK
- Standard
- EN 12101-7:2011, Annex ZA, System 1
- First issued
- 8 July 2025Saint-Aubin · Y. Le Tallec, Certification director
Efectis performed initial type-testing, initial factory and FPC inspection, and carries out continuous surveillance. The certificate allows CE marking while test methods, FPC requirements, product and manufacturing conditions are unchanged.
06 · Declaration of Performance
DoP No. IFS-DS-002
- Product-type
- IFS-DS Rectangular Multi-Compartment Smoke Control Ductwork
- Intended use
- Fire resisting multi-compartment smoke control ductwork tested to BS EN 1366-8, incorporating grilles, access panels, attenuators and VCDs
- Manufacturer
- Imperial Ductwork Services LtdSargasso, Five Arches Business Estate, Maidstone Road, Sidcup, Kent DA14 5AE
- System of AVCP
- System 1
- Harmonised standard
- BS EN 12101-7:2011
- Notified body
- Efectis France, no. 1812Certificate 1812-CPR-2293
- Signed
- R W Chapman4 Copthall Avenue, London EC2R 7DA · 24 July 2025
- Reference
- DOP.002.12-25.V2.0
07 · Accreditations
Accreditations
FIRAS certification scheme
Application of passive fire resisting products using ducting, from 07/11/2023.
- Certificate
- GI8248, issue 1
- Issued
- 07/11/2023
- Valid to
- 07/11/2028
- By
- Warringtonfire
ASFP contractor member
Association for Specialist Fire Protection.
- Membership
- 3371/C
- Expiry
- 05/09/2025
- Signed
- Mike Ward, MD
Institution of Fire Engineers
Affiliate organisation.
08 · QA procedures
Quality assurance
ISO 9001:2015 certificate of registration
Provision of installation, and contracting of ductwork ventilation systems, and fire solutions within the UK.
- Certificate
- 253359
- Initial / latest
- 29 May 2024
- Expiry
- 28 May 2027
- By
- British Assessment Bureau (UKAS 8289)
Quality Procedure 15: Fire Rated Installation
Q-15000 Rev 7 · 08/2025
Objective & scope15.0–15.1
15.0 To ensure all projects under the control of IDSL follow the quality procedures and control required to maintain traceability through the installation period of all fire-resistant ductwork and dampers.
15.1 Applies to all contracts and site staff, without exception, for fire rated installations and standard DW144 / DW145 installations.
Definitions15.2–15.6
15.2 Estimating: refer to procedure 1.
15.3 Fire resistant ductwork performs smoke control and ventilation (e.g. kitchen extract); its primary function is fire compartmentation, meeting load-bearing, integrity and insulation criteria evaluated to BS EN 1366.
15.4 FDs, FSDs & SCDs maintain compartmentation and prevent the spread of fire and smoke; SCDs also help extract smoke from the room of incident.
15.5 VCDs control airflow and must match the fire resistance of the system they are installed in, evaluated to EN standards.
15.6 Manufacture: to DW144 (procedure 5); fire rated items per the specialist manufacturer, including DW172 kitchens and DW145 dampers. IDSL fire resisting ductwork is made at Imperial Ductwork Manufacturing.
Handover & technical submittals15.7
Project Handover Meeting before works start (Contracts Engineer, Manager, Director, Estimating Manager, CAD, QS and IFS), with a Contract Handover Document. IDSL must ensure any contractual agreements to the design are noted and corrected against the main contract document. Technical submittals are updated as the design changes.
Estimating issues drawings highlighted to the IDSL colour coding. The QS files the handover document with the Quality Control Manager on the "1.0 Fire Rated Schedule". All IDSL insulation is Isover, ordered via IDSL.
The Contracts Engineer prepares the submittal with data sheets, specification references, integrity and insulation durations, scope, drawings and the test standard basis. BS EN 1366 Parts 1, 8 or 9 are the primary standards; BS 476 Part 24 assessments should not be used. Submittals are reviewed by IFS, issued to the client and design team, and uploaded to Procore and the IDSL server.
Drawings, fixings & materials15.7
CAD reads the fire rated specification and Fire Strategy before drawing; issues outside IDSL control are raised with the client. FDs, MFSDs, FSDs and SCDs are labelled individually with a specification table; drawings carry an LPS number.
A project-specific pull test is arranged to select fixings and supports. Bespoke items such as fans, attenuators and risers are discussed with IFS.
Batch numbers and manufacture dates of all products are recorded with the QA Manager. The first tube of each box of curing product is checked; part-cured product is not used. An insulation sample is checked on each project for 65 kg/m³. Signed delivery sheets are returned to the QA Manager.
Labour, inspection & insulation15.7
All labour installing fire rated ductwork, FDs, FSDs and SCDs must be trained, with evidence issued to the Quality Control Manager on every project; all managers are inducted on IDSL fire resisting products (Fire Rated Installation Induction and Certificate).
Site inspections by the specialist manufacturer and internal team take place before and after insulation. Isover is fixed with welded pins, so RAMS include hot works. Insulation is 2 × 60 mm (120 mm), overlapped between sections.
| Application | Insulation | Rating |
|---|---|---|
| EN 1366 Part 1 Supply | 120 mm | 120 min |
| EN 1366 Part 1 Extract | 120 mm | 120 min |
| EN 1366 Part 1 Kitchen Extract | 120 mm | 60 min |
| EN 1366 Part 8 Smoke Extract | 120 mm | 120 min |
| EN 1366 Part 1 Smoke Make Up Supply | 60 mm | 120 min |
| EN 1366 Part 9 Smoke Extract | Uninsulated, only in the final compartment | |
The specification must always be checked. Penetration openings are insulated with Isover and fire batted before IDSL fit penetration seals both sides.
Leakage testing15.7
All fire-resistant systems are 100% leakage tested during installation (where of sufficient volume) to meet BS EN 12101-7:2011 Annex B Table B.1, as acknowledged in the IFS/Efectis email of 03/08/23, using Document 3001 Air Leakage Test Sheet with Form 5.
Testing follows BESA DW 145. Each file holds the witnessed test sheet, drawings and the test machine calibration certificate, flow rates to ISO 8501:2007 at 1.2 kg/m³.
09 · Construction & installation details
Ductwork & access doors
Manufacturing notes
- All dimensions in millimetres; 1.0 mm GSS sheet throughout; all fixings steel.
- All stiffening corners fixed with a mechanical fixing; HENROB fixings at 100 mm maximum spacing.
- All internal splitters welded in place; only Product 58 acrylic mastic for sealing.
- CGF flanges with G clamps at max. 150 mm centres, gasket and auto stitching.
- Stiffening: up to 670 mm length none; 671–1340 mm S4 four-sided stiffener. Ducts over 1000 mm high: see IFS-TS/DS-M/SE-8/200 series.
Access door sizes (insulated, IFS-TS_DS-T-012)
150 × 300 × 150200 × 200 × 150200 × 300 × 150300 × 300 × 150300 × 400 × 150400 × 400 × 150450 × 300 × 150450 × 450 × 150
IFS access panel with housing. The uninsulated version (T-013) uses an Ace Filtration access panel.
Sealants & intumescent products
Envirograf · AP058-01-2022
Product 58 AM intumescent mastic
Intumescent acrylic high pressure mastic: a permanent flexible joint against fire, smoke and toxic fumes. Over-paintable; fits a standard skeleton gun.
- Max. joint
- 40 mm
- Touch dry
- approx. 15 minutes
- Clean tools
- warm water
- Health
- Non hazardous; goggles and protective clothing; keep out of drains
Arbo · Fixmart data sheet V01
Arboseal intumescent tape
Preformed intumescent strip on synthetic rubbers; expands and chars under flame to block fire and smoke.
- Size
- 15 × 3 mm × 12 m reel
- Application
- +5 to +50 °C
- Service
- −25 to +50 °C · 20 years+
- Compliance
- BS 476-22:1987, Warrington C118002, TRADA IT349
- Storage
- 12 months unopened, cool and dry
Rolf Kuhn GmbH · SDS rev. 1.1, 25.03.2019
Kerafix 2000
Acrylic-latex bound AES-wool (alkaline-earth silicate fibre) paper for heat insulation, seals and expansion joints and fire protection systems.
- Hazard
- Not classified (EC 1272/2008); no warning label
- Melting point
- > 1200 °C; does not burn
- PPE
- Goggles EN 166, nitrile gloves EN 374, P2 mask if dust
- Handling
- Avoid dust; no compressed air or sweeping
- Storage
- Cool, dry, frost-free; away from acids
Product 58: metres of gap sealed per tube
10 · Fixings & supports
Fixings & supports
IFS-DS fire resistance duct support guide (IFS-DS-01-TS-05 Ver 2.0) and riser bracketry.
Hilti · technical datasheet, Sep 24
HUS3 screw anchor
High performance screw anchor for single point fastening in concrete. ETA-13/1038; design to EN 1992-4. Used in the fire stopping details as HUS3-H 6, 60 mm.
- Versions
- H hex · C countersunk · A external thread · P / PS / PL pan head · I internal thread · I-Flex
- Concrete
- C20/25, hammer drilled
- Size 6
- Ø6 drill · clearance Ø9 (PL Ø10) · SW 13
- Drill depth
- hnom + 10 mm (floor/wall), + 3 mm (ceiling)
- Min. spacing / edge
- 35 / 35 mm
- hnom 40 / 55
- Torque 20 / 25 Nm · hmin 80 / 100 mm
fischer · catalogue pp 228–231
ZYKON hammerset anchor FZEA II
Internally threaded undercut anchor with low anchoring depth for individual fixings in cracked and non-cracked concrete. Pre-positioned installation with the FZUB drill and FZED plus setting tool.
- Approved
- Concrete C20/25 to C50/60, cracked and non-cracked (ETA-06/0271)
- Also
- C12/15, dense natural stone
- Certificates
- CE, fire resistance R 120, FM approved from M10
- Versions
- Zinc-plated, stainless (A4), high corrosion-resistant (C)
- Uses
- Pipelines, ventilation, sprinklers, cable trays, ceilings
| Item | Art.-No. (gvz) | Drill FZUB | Setting tool | Length | Bolt pen. max/min | Unit |
|---|---|---|---|---|---|---|
| FZEA II 10 × 40 M8 | 047303 | 10 × 40 | FZED 10 plus | 43 | 17 / 11 | 100 |
| FZEA II 12 × 40 M10 | 047304 | 12 × 40 | FZED 12 plus | 43 | 19 / 13 | 100 |
| FZEA II 14 × 40 M12 | 047305 | 14 × 40 | FZED 14 plus | 43 | 21 / 15 | 50 |
Permissible loads, single anchor, C20/25. hmin 80 mm, hef 40 mm, spacing for max. load 120 mm. Partial safety factor γF = 1.4.
11 · Fire stopping details
Fire stopping details
+100mmopening: duct width + 100 × depth + 100
50mmgap packed with 60 mm Isover and 2 mm Protect BSF
200mmmin. between openings (300 mm between ducts)
75mmmin. to an adjacent wall or slab
12 · Fire insulation
Isover U Protect
Tested to EN 1366-1 and EN 1366-8 and assessed to BS 476 Part 24: up to 2 hours for HVAC ventilation and smoke extract ducts, and up to 1 hour for kitchen ducts.
Saint-Gobain Isover · 001-473, 02 Aug 2024
U Protect Slab 4.0 Alu1
High performance ULTIMATE mineral wool slab for fire protection of rectangular ductwork, faced one side with black aluminium foil.
- Reaction to fire
- Euroclass A1 (EN 13501-1)
- Max. service temp.
- 400 °C
- Certification
- UKCA / CE to EN 14303 · MW-EN-14303-T4-ST(+)400-MV2
- Quality
- ISO 9001 · ISO 14001 · EUCEB
- External use
- Not suitable
| Product code | Thickness | Size | Slabs/pack | m²/pack | kg/m² |
|---|
| Mean temp °C | 10 | 50 | 100 | 150 | 200 | 300 | 400 |
|---|---|---|---|---|---|---|---|
| λ (W/m·K) | 0.031 | 0.035 | 0.040 | 0.047 | 0.054 | 0.072 | 0.096 |
IFS-DS uses 60 mm slabs in two layers (120 mm), highlighted.
U Protect components
Isover · APR-2024
Protect Black Tape
- Reaction to fire
- A2-s1,d0 (EN 13501)
- Material
- Black aluminium tape, inorganic glue
- Tensile / adhesion
- 13 N/cm / 10 N/cm to steel
- Operating
- −40 to +130 °C
- Processing
- +5 to +30 °C, dry dust-free surface, use a spatula
- Pack
- 90 mm × 100 m, 12 rolls
Isover · DEC-2022
Protect BSF paint
- Fire
- B2 (DIN 4102-4); forms a micro-porous insulating layer
- Material
- Solvent free, pH neutral, VOC free water-based dispersion; not CLP classified
- Use
- Stir; dilute up to 10%; brush, roller or spatula
- Drying
- Touch dry 4 h; fully dry 24–48 h
- Processing
- +5 to +30 °C
- Pack / storage
- 15 kg bucket, 400 g cartridges ×12 · 18 months frost-free
Isover · DEC-2022
Protect BSK glue
- Reaction to fire
- Non combustible, A1
- Material
- Inorganic sodium silicate glue, VOC free
- Use
- Stir; dilute up to 10%; brush, roller or spatula
- Hardened
- ~12 h at 20 °C, 50% RH
- Processing
- +8 to +30 °C
- Pack / storage
- 8 kg bucket, 310 ml cartridges ×20 · 12 months at +15 to +25 °C
Rockwool · DBI Certification 2531
FIREPRO Ablative Coated Batt
Penetration seal, required as the first 60 mm layer in i8 (kitchen) systems.
- CoCP
- 2531-CPR-CXO10265
- Basis
- ETA-22/0157 (EAD 350454-00-1104), System 1
- Plant
- CPA50052, Pencoed, Bridgend
- Issued
- 21 Apr 2022 (first 10 Dec 2021)
13 · Volume control dampers
Volume control dampers
Advanced Air (UK) Ltd · ES-167 issue B
1500 Series volume control / smoke damper
A balancing damper for fire or smoke rated ductwork. Fully welded frame with enclosed linkage and bearings, so it can be covered by fire rated spray, boards or panels without affecting operation, or left unprotected. Integrity and stability for up to two hours when fully closed with no power to the actuator; the frame withstands a four hour exposure. Also a tested component in Efectis report EFR-25-002463.
- Blades
- 1.6 mm galvanised mild steel (430 stainless optional), parallel or opposed
- Frame
- 1.6 mm, 200 mm deep (180/195 optional), 30 mm flange (25/35 optional), button-locked corners
- Size
- 100 × 100 mm min. to 1200 × 1800 mm max. single section; larger as multiple sections
- Bearings
- 12.7 mm sintered bronze to 200 °C; stainless to 400 °C or 600 °C optional
- Linkage
- Fully enclosed, 90° operation, zinc electroplated
- Seals
- Semi or fully sealed; PVC to 80 °C or silicone to 175 °C optional
- Operation
- Hand locking quadrant, 230 V / 24 V actuator, pneumatic; RH drive standard
Installation drawing
14 · Attenuators
Attenuators
Allaway Acoustics · data sheet A10H
Rectangular attenuator, loose splitter elements
Allaway fire-rated pods fitted into an attenuator casing manufactured to the IFS-DS specification. Read with the project attenuator technical submittal.
- Models
- SP: central splitters and side linings · SL: side linings only
- Lengths
- Nominal 600–3000 mm in 300 mm steps (actual 570–2940 mm)
- Size
- Width above 199 mm, height above 99 mm; made to order
- Infill
- Sound absorbent, encapsulated in glass cloth and perforated steel, aerodynamic fairings
- Suffixes
- G galvanised · S 316 stainless · H1 high temperature (2 hour / 300 °C) · K paint · J horizontal · M Melinex · F fitted at works · Z modular
- Fitting
- Elements 5 mm under height; fitted tight with equal airways. Casing: 4.9 × 16 mm pop rivets at max. 150 mm, stiffener if required
- Performance
- Tested to ISO 7235; tolerance < 1.0%
Installation drawing
15 · Maintenance recommendations
Maintenance
Fire resistant ductwork is a passive fire-resistant system. The ASFP and BS 9999:2017 recommend scheduled periodic inspection, and article 17 of the Regulatory Reform (Fire Safety) Order 2005 requires it to be kept in efficient working order and good repair. The inspection period may vary by project and specification.
Annual visual inspection
Without a contract-specific regime, carried out by others to the specified regime or the fire safety manual:
- Have post-handover services been supported from the suspension system designed solely for the fire-resistant ductwork?
- Does the external fire insulation show any signs of damage?
- Dust or debris must be prevented from accumulating on the insulation or duct surface.
- Are all access panels installed correctly and still accessible?
- Kitchen extract systems need a dedicated cleaning regime to BESA TR19 and DW 172.
BS EN 12101-7:2011, Annex A, Table A.1
Annual, or more often if the specification demands. The whole smoke control system should be checked under its O&M requirements; inspection provision sits in the contract documentation.
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Imperial Fire Solutions is a division of Imperial Ductwork Services Ltd.Registered office: Numeric House, 98 Station Road, Sidcup, Kent, DA15 7BY. Registered in England No. 03402613.
Q-15008 Rev 7 | 06/2025 · Originator: Ben Stocker & Mark Crafter