construction technology · • advantages of double glazed upvc windows & doors ... south...

WEEDOO - SA CONSTRUCTION TECHNOLOGY

www.weedoo-sa.co.za

• Advantages of Double Glazed uPVC Windows & Doors

WEEDOO – SA

Technical Support

by

Jason Jorgensen

Advantages of uPVC Windows and Doors

Heat and

Cold insulation

Sound insulation

Water tightness


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Dust proof

and air tight

High impact

resistant and

robust

Easy

maintenance


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Burglar Resistant


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Galvanised Steel Reinforcing

encapsulated in the main

reinforcing chamber.

Multi-Point locking systems on

all opening sections

All glass used in our sealed

units are Toughen Safety glass.

Always 2 layers of Toughened

glass = double security


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Energy Loss with Glass

Single Glazing

Insulated Double Glazing

Specially Coated Glazing


www.weedoo-sa.co.za Thermal Conductivity U-Value in Accordance to DIN 4108

1,0

1,2

5,8

414,0

1.428,0

0,0 200,0 400,0 600,0 800,0 1.000,0 1.200,0 1.400,0 1.600,0

RATIO

Wood

uPVC

Glass

Steel

Aluminium

Thermal Conductivity k in accordance to DIN 4108

NOTE: Aluminium has the highest thermal conductivity


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Thermal Transmittance U-Value in accordance to DIN 4108

1

2

3

0 0,5 1 1,5 2 2,5 3

RATIO

Energy Loss in W/m2K per hour

Aluminium with single glazing, 5,1-5,6

Aluminium with double glazing, 3,2-3,8

uPVC with double glazing, 1,7-2,1

1

2

3

0 0,5 1 1,5 2 2,5 3

RATIO

Energy Loss in W/m2K per hour

Aluminium with single glazing, 5,1-5,6

Aluminium with double glazing, 3,2-3,8

uPVC with double glazing, 1,7-2,1

U value

Aluminium with single glazing 5.1 – 5.6

Aluminium with double glazing 3.2 - 3.8

uPVC with double glazing 1.7 – 2.1 :-

3.0 used as the Default Value

NOTE: uPVC with double glazing has the lowest U value


www.weedoo-sa.co.za Isothermal Representation

as per European Standard EN 10077 for Thermal Transmission Coefficient

inside: 20°C

outside: 0°C outside: 0°C

inside: 20°C

Frame Uf-value: 1.4 W/(m²K)

without steel

Frame Uf-value: 1.8 W/(m²K)

with steel

Blue line: 10°C, Red line: 13°C


www.weedoo-sa.co.za Thermal Transmission Coefficient Calculation for Uw-value (glazed window value):

Window Sample With Ug= 5.7

10

1.0

86

103

.15

8

58

116

Standard Window Size 1.8m x 1.8m Total Area =3.24m²

Profile System: SOFTLINE AD 58 Uf = 1.8

Single Glazing 6mm Ug=5.7

Double Glazing Spacer Yg = N/A

formula: Uw = (Uf x Af) + (Ug x Ag) + (Ῠg x lg)

= W / m² K (Af + Ag)

formula: Uw = (3.24 x 0.72) + (5.70 x 2.57) + (0.00 x 12.52)

= 5.16 (0.72 + 2.57)

Therefore the Window U-Value (EN 10077):

Uw = 5.16 W/(m²K)


www.weedoo-sa.co.za Thermal Transmission Coefficient Calculation for Uw-value (glazed window value):

Window Sample With Ug= 2.7

101.

08

6

103

.19

6

123

.5

58

Sandard Window Size 1.8m x 1.8m Area =3.24m²

Profile System: SOFTLINE AD 58 Uf = 1.8

Double Glazing 4mm-16mm (air gap)-4mm Ug=2.7

Double Glazing Spacer Yg =0.06

formula: Uw = (Uf x Af) + (Ug x Ag) + (Ῠg x lg)

= W / m² K (Af + Ag)

formula: Uw = (1.80 x 0.61) + (2.70 x 2.50) + (0.06 x 12.52)

= 2.75 (0.61 + 2.50)

ENERGY SAVING

47% more energy saved by using double glazing

Therefore the Window U-Value (EN 10077):

Uw = 3.0 W/(m²K)

Default Setting


www.weedoo-sa.co.za 1. Outward Opening Casement with Single Glazing – Heat Transmission

Surface temp.:

27.4°C Surface temp.:


34.8°C

Outside 30°C / Inside 20°C Outside 35°C / Inside 20°C

Glazing: Ug-Value = 5.7 W/(m²K)

Outside 40°C / Inside 20°C


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2. Outeard Opening Casement Window with Double Glazing – Heat Transmission

Outside 30°C / Inside 20°C Outside 35°C / Inside 20°C Outside 40°C / Inside 20°C

Surface temp.:

23.6°C

Surface temp.:


27.2°C

Glazing: Ug-Value = 3.0 W/(m²K), no layer - Default Value


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ENERGY SAVING

3000 mm

22

00

mm

Total window area 3000 x 2200 = 6.6 m2

Glass area 5.4 m2

Frame area 1.2 m2

U-value single glazing 5.8 W / m2 K

U-value double glazing 3.0 W / m2 K

5.8 – 3.0 = 2.8 W / m2 K

U-value aluminium profile 7.5 W / m2 K

U-value uPVC profile 1.7 W / m2 K

7.5 – 1.7 = 5.8 W / m2 K

Temperature difference between inside and

outside = 20°K

Average air conditioner running time in summer

= 8.5 hours/ day

( 2.8W x 5.4m2 + 5.8W x 1.2 m2 ) x 20°K x 8.5 hours = 3.754 KW Saving / Day


www.weedoo-sa.co.za 10

1.0

97

10

3.2

14

96

55

67

13

58

Profile System:

Overview:

Casement Windows & Shutters Sliding Windows & Shutters Tilt & Turn Windows Single Doors & French Doors & Shutters Slinding Doors & Shutters


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System Features

Profile width: 58 mm

* 3 chamber frame and sash profiles with galvanised steel reinforcement

* 2 sealing levels (inside + outside)

* Uf-value: 3.0 W/m²K

* Wide range of profiles


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76

82.5

132.5

55mm and 67mm

frames with recessed

sashes

76mm frame with half

flush sash

82mm frame with flush

sash

Frame & Sash Combinations:


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South Africa needs double glazed uPVC Windows & Doors

for all their inherent advantages.

SANS 204 WEEDOO-SA, is a reliable partner for high quality

extrusions for uPVC Windows & Doors.

You as our partners, and we as your technical associates,

can make it happen.


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