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NEXT SD 121 security door

The NEXT SD 121 is suitable for use as an exterior security entry door for a house. We offer this model in numerous modern designs. It can also be manufactured as a security replica of historical doors. The SD 121 is installed in a special two-piece NEXT SF 2A security doorframe. Thanks to its robust construction in combination with this doorframe, the SF 121 fulfils the highest requirements for security and thermal insulation.

Security class

Thermal insulation

U = 1.4

Warranty

Up to 20-year*

DETAILS OF DOOR

Door Surfaces

Door surfaces form the character of the entire house or interior. You can choose veneer, laminate, wooden surfaces or varnished in a wide RAL range.

23 locking points

The house entry door is controlled by a robust security lock.
The door is further secured by three steel hinges on the hinge side.

Hardened lock-cylinder cover

The lock is controlledby a security cylinder,
which is protected by a solid cover of hardened steel
against brute-force attacks.

Dual solid steel pins

The door’s main security element comprises 19 reinforced steel pins on the lock and hinge sides of the door.

Secure partial door opening

House doors are equipped with a steel security lever, which enables secure partial door opening.

Certified transoms and sidelights

Transoms and sidelights also providenatural light in your entryway.
Glazed entry doors for houses have class-3 security certification.

Motorised door control

You will never again forget to lock your door. You can work in your garden and not have to worry about unintentional closing of your home’s entry door. You can always unlock it electronically with a fingerprint, keypad or contactless chip, for example.

Automatic sealing rail

The automatic lower sealing rail ensures sealing of the door while preserving barrier-free access.

Thick mineral-wool insulation

Mineral-wool insulation not only ensures the fire resistance of doors, but also provides increased sound and thermal insulation. Entry doors with this insulation are thus suitable also for energy-efficient houses.

These doors are intended for interior and exterior use and thus have increased resistance to the effects of weather.

Veneer, solid wood, stainless steel and RAL painted surfaces.

Suitable for installation of a concealed door closer

Rigid steel skeletonwith frame, ribbing and two-side full-area armouring.

For the steel skeleton and metal locking mechanism, we providea 36 months quality guarantee, which can be extended to up to 20 years.

*Certified qualities of components with extra cost.

NEXT SD 121 security door

Security class

Thermal insulation

U = 1.4

Warranty

Up to 20-year*

DETAIL:

1. chemical anchors
2. insulation in doorframe
3. security doorframe NEXT SF2A
4. doorframe sheathing with sealing
5. sound and thermal insulation
6. steel skeleton
7. two-side armouring
8. security hinges with bearings
9. double locking points
10. stainless-steel edges
11. Multipoint mortise lock
12. door surfaces
13. sealing rail
14. threshold with integrated sealing

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Bezpečnostní certifikáty

tt_459_2017_certifikat_shody_sd121_a_sd121f_platnost_od_2_1_2018_do_2_1_2021.pdf.pdf

Fire-resistance and other certificates (cz documents)

dvere_next_sd102_102f_102_f_45_protipozarni_certifikat_platnost_do_31_07_2021.pdf.pdf

Installation manuals (cz documents)

Instalační manuál bezpečnostní dveře NEXT SD 102, SD 121 (cz).pdf

Instalační manuál bezpečnostní zárubně NEXT SF1 (cz).pdf

Price list (cz documents)

cenik_sd_2024.pdf.pdf

cenik_sd_2024_eur.pdf.pdf

Comparison table of security doors

TYPE	SD 101	SD 111	SD101 (2015)	SD 102	SD 121	SD 102D	SD 104
Recommended usage	The bestselling entry doors for apartments	For outward opening from a protected space	Zabezpečení bytových dveří větších rozměrů	The most robust entry door for houses in this category on the market	the highest requirements for security and thermal insulation	The most robust double-wing entry door in this category on the market	Represents a completely new generation of concealed security doors in concealed security doorframes
Suitable door hardware	the original a metal or SF1	the original a metal or SF1	SF1	SF2A	SF2A	SF2A	SF4
Security class (ENV 1627) for opening to inwards	BT 3	BT 4	RC 3	BT 3	BT 4	BT 3	RC 3
Security class (ENV 1627) for opening outwards	-	BT 3	-	-	-	-	RC 3
Fire resistance (označení F)	EI 30, EW 30		EI 30, EW 30	EI 45, EW 45	EI 30, EW 30	EI 30, EW 30	EI 45, EW 60
Thermal resistance	R = 0,32	R = 0,32	R = 0,32	R = 0,5	R = 0,55	R = 0,55	R = 0,54
Heat transfer coefficient	U = 2,0	U = 2,0	U = 2,0	U = 1,4	U = 1,4	U = 1,4	U = 1,4
Acoustic attenuation	Rw 33-39dB	Rw 33-39dB	Rw 36dB	Rw 33-42dB	Rw 33-42dB	Rw 33-42dB	Rw 38dB
Smoke resistance Sm, Sa	Yes	Yes	No	Yes	No	No	No
Air permeability	2	2	4	4	4	4	4
Water tightness	1A	1A	X	1A	1A	1A	3A
Resistance to wind load	1	1	C4	3	3	3	C5
Standard dimensions of door	bespoke	bespoke	bespoke	(800, 900) x (1970, 2100, 2200)		bespoke	(800, 900) x (1970, 2100, 2200)
Maximum dimensions of door (with security certificates)	1100x2100	1100x2100	1100x2100	1000x2500	1100x2200	2200x2500	1100x2540
Maximální rozměr křídla (with security certificates and fire resistance)	900x1970	900x1970	900x2200	900x2400	-	2070x2415	900x2200
Door thickness (mm)	42	42	42	74	74	74	70
Weight (kg)	70	82	78	95	115	approx. 150	95
Interior surface	laminate, veneer, H-dex, solid wood			veneer, solid wood, H-dex
Exterior surface	laminate, veneer, H-dex, solid wood			veneer, solid wood, H-dex
Interior surface for use	H-dex			solid wood, H-dex
Number of locking points	17	21	17	19	23	34	18
TYPE	SD 101	SD 111	SD101 (2015)	SD 102	SD 121	SD 102D	SD 104

The Company NEXT, s.r.o. reserves the right to change of the products. Colours of samples and specifications in the catalog and on the website www.next.cz need not agree with reality.

NEXT SD 121 security door - Gallery

NEXT SD 121 security door - Accessories

Door hardware

Hardware NEXT S102 plate

(knob + lever or lever + lever) nickel – for interior use only

Security lock cylinders

Evva EPS

Security class 4, 6 active detection elements

Evva ICS

Security class 4, protection against copying of keys

Evva 3KS

Security class 4, functionality of springless tumblers

Hi-tech security systems

Fingerprint reader

In combination with a motorised lock cylinder, a fingerprint reader makes it possible to unlock a door without using a key.

Digital door view — with recording function

New, innovative door viewer with recording function — easy installation

EMZY – motorised lock cylinder

A special cylinder that can be operated with a key or electronically

Other accessories

Chain SK 66

High-quality door chain with child safety catch

Panoramatic door viewer

can be mounted in doors with thickness of 35-63 mm

Door stoppers

Door stoppers are used relatively rarely, even though they are very useful items.

Door closers

for exterior and interior doors with maximum weight of 120 kg

The Company NEXT, s.r.o. reserves the right to change of the products. Colours of samples and specifications in the catalog and on the website www.next.cz need not agree with reality.