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Franzen Feuerschutztüren GmbH
Gerhard-Welter-Str. 7
D-41812 Erkelenz

phone +49 (0) 2431-80070

Franzen - ceiling flaps

Single-leaf multi purpose ceiling flap DKN-1

Franzen ceiling flap DKN-1
Single-leaf multipurpose ceiling flap
Installation in internal ceilings

according to DIN ENV 14351-2 CE-Zeichen marked

Installation in external ceilings

according to DIN EN 14351-1 CE-Zeichen marked

Combinable with additional performance characteristics:

Burglar resistance

RC4 - classification report no. 22-5/15.119, PIV-Velbert
RC3 - classification report no. 22-4/15.117, PIV-Velbert

according to DIN EN 1627 ff

(fire ceiling flap T90 Franzen THF)

Acoustic performance

up to RW (C;Ctr) = 42 (-1;-3) dB

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

test report 81 16 48 52 29 -10, TÜV Nord

*Due to the approved dimensional range of the ceiling flap, the maximum acoustic performance value of RW (C;Ctr) = 45 (-1;-3) dB listed in the measurement report is reduced by 3dB to the above-mentioned value of RW (C;Ctr) = 42 (-1;-3) dB.
See expert opinion SEII-16-0211-Hrd, TÜV Nord

(fire ceiling flap T90 Franzen THF)

Thermal transmittance

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

Air tightness

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

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
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 ceiling flap types:

Fire resistance

(fire ceiling flap T90 Franzen THF)

Allgemeine bauaufsichtliche Zulassung Nr. Z-6.20-2061, DIBt Berlin
Smoke control
tested according to DIN 18095 RS-1

(fire ceiling flap T90 Franzen THF)

Allgemeine bauaufsichtliche Zulassung Nr. Z-6.20-2061, DIBt Berlin
Technische Beschreibung
(rough building dimension)

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

width up to 1,350 mm
height up to 2,500 mm
Flap leaf

leaf thickness 67 mm - smooth double-walled
plate thickness 1.0 mm

  • thin rebate design
    • optional thick rebate design
    • insulating insert
      • optional insulation inlet full-face glued and pressed with cover plate
        thus particularly plane and smooth door leaf
  • frame-system "ZNG" with flush clipped in profile strips
  • or
  • frame-system "ZG"
  • frame four-sided surrounding
  • (see installation variants)
  • corner frame
  • optional enclosing frame
  • optional block frame

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


concealed door hinges
thus smooth surface without tripping edge


Top side: embedded folding ring shell
Lower side: handle


single locking according DIN 18250

  • optional profile cylinder prepared (cylinder on-site)

various locking systems possible

  • with grating cover made of steel or aluminium
  • with checker plate 3 mm made of steel or aluminium
Opening assist

gas spring
- adjusted to the flap weight
- easy opening

  • in concrete ceilings
  • in special ceilings on request
  • optional blunt installation in soffit
  • optional installation on the wall plate

external ceiling flaps CE-Zeichen marked according to EN 14351-1

  • lock control
  • powder coating in RAL colors
  • 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.

  • Deckenklappe DKN-1
    Franzen DKN-1single-leaf ceiling flap 

DKN-1 Downloads