U_W- value 1.2

WDS 7S — when the window becomes part of the interior. This series is created for those who don't want to choose between beauty and energy efficiency. The main feature of the system is the Soft Line design: rounded lines of the frame and sash give the window softness and sophistication, eliminating the "office plastic" feel.

Why WDS 7S is better than standard solutions:

Maximum thermal insulation in the 70 mm class: While competitors (Kömmerling EuroFutur, Rehau Euro) offer 5 chambers, WDS 7S has 6 chambers. This reduces the heat transfer coefficient to Uf=1.1 W/m²K, which is 10-15% more efficient than analogues.
Safety and hygiene: Rounded edges are not only beautiful but practical — less dust accumulates on them, and they're safer for children (no sharp corners on open sash).
Perfect for Spain: The system is designed for high wind loads and aggressive sun exposure, confirmed by ift Rosenheim certificates.

The ideal choice for bedrooms, children's rooms, and living rooms where coziness and visual harmony matter.

Technical Specifications

Details

Aesthetics without compromise. 6-chamber system with Soft Line design for refined interiors.

Energy rating

Profile chambers

6 chambers

Profile depth

70mm

Profile height

113mm

Glass unit

up to 40mm

Thermal protection

Uw ≤ 1.2 W/(m²·K)

Sound insulation

≈42 Rw(dB)

System Design Parameters:

Installation depth: 70 mm.
Profile construction: 6 chambers (in frame and sash).
Outer wall thickness: Class B compliant, providing excellent balance between cost and weld seam strength.
Reinforcement: Use of closed or reinforced U-shaped reinforcement (up to 2.0 mm), critical for large-area structures.
Sealing: 2 circuits of durable TPV gasket, maintaining elasticity at temperatures down to -40°C.
Surface: Smooth high-gloss plastic resistant to static electricity accumulation (attracts less dust).

Glazing Options:

Maximum filling thickness: up to 40 mm.
Filling types: Double-chamber glass units using special glasses (multifunctional, energy-saving) with argon filling.
Glazing bead: Classic or modern rounded option.

Maximum Structure Dimensions:

Maximum sash width: up to 1000 mm.
Maximum sash height: up to 2350 mm.
Application: Windows, balcony doors, entrance groups (using specialized door sash).

Certified Characteristics:

Thermal resistance coefficient (Ro): up to 0.90-1.04 m²°C/W (depends on reinforcement and glass unit configuration).
Profile thermal insulation (Uf): ~1.1 W/m²K.
Sound insulation (Rw): up to 36-38 dB.
Air permeability: Class 4 (high airtightness in strong wind).
Water tightness: Class 8A (DIN EN 12208).

Documentation

WDS 7S Technical Catalog

PDF. 4.1Mb

WDS 7S System Passport

PDF. 0.7Mb

WDS 7S (70 mm)

Aesthetics without compromise. 6-chamber system with Soft Line design for refined interiors.

Average market price:

For a standard 2-sash tilt-and-turn window (1200 × 1400 mm) with basic double-glazed unit.

Calculate your window

Comfort Index

Compare with Similar Profiles

Alternative solutions from other manufacturers

U_W- value 1.4

WDS 5S

Best price. 5-chamber 60mm system for glazing cottages, balconies, and utility rooms.

Energy rating

Profile chambers

5 chambers

Profile depth

60mm

Profile height

107mm

Glass unit

up to 32mm

Thermal protection

Uw ≤ 1.4 W/(m²·K)

Sound insulation

≈38 Rw(dB)

More details

U_W- value 1.3

WDS 6S (70 mm)

Gold standard of glazing. 6-chamber 70mm system with improved sound insulation.

Energy rating

Profile chambers

6 chambers

Profile depth

70mm

Profile height

113mm

Glass unit

up to 40mm

Thermal protection

Uw ≤ 1.3 W/(m²·K)

Sound insulation

≈40 Rw(dB)

More details

U_W- value 1.1

WDS 76 AD (76 mm)

New European standard. 76 mm system allowing powerful glass units without paying premium prices.

Energy rating

A+

Profile chambers

5 chambers

Profile depth

76mm

Profile height

113mm

Glass unit

up to 48mm

Thermal protection

Uw ≤ 1.1 W/(m²·K)

Sound insulation

≈46 Rw(dB)

More details

U_W- value 1.3

Rehau Euro-design 70

Classic 5-chamber system with 70 mm depth, reliable and economical for standard construction. HDF surface.

Energy rating

Profile chambers

5 chambers

Profile depth

70mm

Profile height

108mm

Glass unit

up to 40mm

Thermal protection

Uw ≤ 1.3 W/(m²·K)

Sound insulation

≈43 Rw(dB)

More details

U_W- value 0.94

Rehau Synego

7-chamber system with 80 mm depth, providing high thermal and sound insulation for comfortable living. HDF.

Energy rating

A++

Profile chambers

7 chambers

Profile depth

80mm

Profile height

117mm

Glass unit

up to 51mm

Thermal protection

Uw ≤ 0.94 W/(m²·K)

Sound insulation

≈46 Rw(dB)

More details

U_W- value 1.2

Rehau Brillant-Design 70

Premium 70 mm system with elegant design, smooth HDF surface and good thermal insulation properties. HDF

Energy rating

Profile chambers

5 chambers

Profile depth

70mm

Profile height

116mm

Glass unit

up to 42mm

Thermal protection

Uw ≤ 1.2 W/(m²·K)

Sound insulation

≈43 Rw(dB)

More details

Side by side

Head to Head: Closest Competitors

How WDS 7S (70 mm) stacks up against the closest matches from other brands.

Specification	WDS 7S (70 mm)This profile	Rehau Brillant-Design 70	Kömmerling EuroFutur Elegance	Cortizo A 70
Brand	WDS	REHAU	Kömmerling	Cortizo
Material	PVC	PVC	PVC	PVC
Profile depth	70mm	70mm	70 mm	70 mm
Chambers	6 chambers	5 chambers	—	—
Glass unit, max	up to 40mm	up to 42mm	up to 39 mm	up to 40 mm
Thermal (Uw)	1.2	1.2	≤ 1.1	≤ 1.1
Sound (Rw, dB)	≈42 Rw(dB)	≈43 Rw(dB)	≈ 40 Rw(dB)	≈ 46 Rw(dB)

See all window profiles compared.

Open full comparison

Leave a Review

Customer Reviews

Find out what people are saying about it

0.0

Average rating

0 reviews

5 ★

4 ★

3 ★

2 ★

1 ★

No reviews yet. Be the first!

FAQs

Frequently Asked Questions about WDS 7S (70 mm)

What's the difference between WDS 6S and WDS 7S?

Technically, both systems have 70 mm and 6 chambers. The main difference is design. WDS 6S has classic beveled edges (geometric style), while WDS 7S has smooth rounded lines (Soft Line). Also, 7S has slightly higher thermal insulation values (Uf 1.1 vs 1.2).

Is this window suitable for "Passive House"?

WDS 7S has very high characteristics, close to Passive House standards, especially when using energy-saving glass units with argon. It's an excellent choice for energy-efficient renovation.

Can this profile be laminated?

Yes, the rounded forms of WDS 7S look especially impressive in "wood" lamination (Golden Oak, Walnut) or trendy Anthracite color, imitating aluminum or wooden windows.

How secure is this window?

The 13 mm hardware groove allows installing reinforced strike plates and mushroom cams, providing burglary resistance class up to RC2/RC3, which is important for ground floors and villas.

Is the window compatible with Spanish roller shutters?

Absolutely. The frame construction allows easy integration of shutter guides (guias de persiana) and connecting the window to the shutter box (cajon de persiana) without thermal bridges.

Are WDS 7S windows easy to maintain?

Very easy. The smooth glossy profile surface doesn't absorb dirt and cleans easily with soap and water. Soft Line rounded forms have no sharp corners where dust accumulates. We recommend lubricating gaskets with silicone once a year, and hardware with machine oil.