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Franzen Feuerschutztüren
Zechenring 23
D-41836 Hückelhoven

phone +49(0)2433/93919‑0

Franzen multi purpose doors

Single-leaf multi purpose steel door ISN-1

Franzen internal steel door ISN-1 "System Schröders"
Single-leaf internal hinged door according to DIN ENV 14351-2 (draft)

Combinable with additional performance characteristics:

Air tightness

up to class 4 according to EN 12207 (up to 600 Pa)

expert opinion no. 11-000082-PR01
Thermal transmittance

UD-value ≥ 1.3 W/(m²K) according to EN ISO 10077-1

Resistance to wind load

up to class C5 (up to 2,000 Pa) according to EN 12210

expert opinion no. 11-000082-PR01

up to class 8A according to EN 12208

expert opinion no. 11-000082-PR01
Resistance to positive and negative pressure

up to 5.000 Pa according to DIN EN 12211

expert opinion no. 16-003037-PR01
Behavior between different climates

class 2 (d + e) according to EN 12219 (deflection)

Ability to release
according to DIN EN 14351-1

proven for doors in escape and rescue routes

Flush with surface

flush-mounted design FLAT

Explosion protection
Logo ATEX For installation in potentially explosive areas, please see confirmation letter Explosion protection ATEX for Franzen hinged doors (in German language) System Schröders (PDF)

Performance characteristics combinable with further Franzen door types:

Fire resistance

T90 (fire door T90 Franzen TSN-11)
T30 (fire door T30 Franzen TSN-1)

according to. allgemeine bauaufsichtliche Zulassung (German approval)

Smoke control

tested Sa / S200 (e.g. fire door Franzen TSN-1 CE)

according to EN 1634-3

Burglar resistance

up to RC4 (z.B. burglar resistance door Franzen ESN-1)

according to DIN EN 1627 ff

Acoustic performance

up to RW (C;Ctr) = 53 (-1;-5) dB (z.B. Schallschutztür Franzen SN-1)

according to EN ISO 10140-1 / EN ISO 10140-2 / EN ISO 717

Technical data
(rough building dimension)

for performance characteristic airtightness, resistance to wind load, watertightness or resistance to positive and negative pressure limited to

width from 500 mm up to 1,350 mm
height from 500 mm up to 2,500 mm
with overhead panel height max. 3,000 mm
Overhead panel
  • optional with fixed overhead panel
Door leaf

leaf thickness 68 mm to 69 mm - smooth double-walled
plate thickness 1.0 mm to 1.5 mm

  • thin rebate design
    • optional thick rebate design
  • frame-system "ZNG" with flush clipped in profile strips
  • or
  • frame-system "ZG"
  • (see installation variants)
  • corner frame
  • optional enclosing frame
  • optional block frame

with elastic rubber seal
(seal type depending on performance characteristic)

Floor seal

depending on performance characteristic

  • optional lowerable floor seal or
  • sliding seal
  • stop seal
Glass inset

glass dimensions variable

minimum frieze width: 90 mm

  • optional with intermediate glass inset bars
  • optional with port-hole
  • optional in overhead panel

glass inset bars with concealed screw connection (for rectangular glass inset)


2/3-part KO door hinges
with patented easy-running bearings as easy running doors

  • optional door hinge with 3D adjustment

various fittings possible


various locking systems possible
profile cylinder prepared (cylinder on-site)


door closer according to DIN EN 1154

  • optional spring hinge for smaller doors / flaps
  • optional hold-open system according to DIN EN 14637
  • in masonry
  • in concrete
  • in aerated concrete
  • in mounting walls
  • in encased steel columns
  • optional blunt installation in soffit
  • optional installation on the wall plate

CE-Zeichen marking only possible after publication of the standard DIN EN 14351-2

  • lock control
  • automated opening
  • motor locks ( also in 3-way locking)
  • powder coating in RAL colors
  • prison cell doors (special locking and food flap)
  • special solutions according to request and customer requirements

The information given refers to the usual configurations. Individual configurations may be required when combining different performance characteristics.

Our team will be happy to assist you with the individual planning of your requirements.

  • multi purpose door ISN-1
    Franzen ISN-1single-leaf multi purpose door

ISN-1 Downloads