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Xtreme™ Low E Double Glazing
Description

Xtreme™ combines strong thermal insulation and solar control with a clear, neutral appearance. It is suited to large or sun-exposed windows where overheating needs to be managed without significantly reducing natural light.

Xtreme™ provides up to 61% better heat retention and reduces solar heat by up to 48% compared with standard double glazing, while allowing 74% of visible light through

Key Features
  • Clear, neutral appearance
  • Up to 61% better heat retention than standard double glazing
  • Reduces solar heat by up to 48% compared with standard double glazing
  • Lets in 74% of visible light, supporting naturally light-filled spaces
  • Low E coating, argon gas and thermal spacer
  • Suitable for residential and commercial windows and doors
  • Can be combined with laminated, tinted or obscure glass
  • 1.1 U value complaint with the latest H1 requirements nationwide
  • Locally processed and available nationwide
LBC Declare Red List Free
LBC Declare Red List Free
Scope of Use

Suitable for residential, multi-residential and commercial windows and doors where both thermal insulation and solar control are required.

Xtreme™ is particularly suited to:

  • Projects requiring both thermal insulation and solar control
  • Large windows and glazed doors
  • Sun exposed living areas and regularly occupied spaces
  • North, east and west facing elevations
  • Projects with a high window to wall ratio
  • Rooms where overheating may be a risk
  • Projects requiring solar control without strongly tinted or reflective glass
  • Double glazed window systems designed to meet H1 requirements
  • Buildings within NZS 3604 wind zones up to and including Extra High, subject to appropriate glass and frame selection
Limitations on Use
  • Xtreme™ reduces solar heat gain and may affect passive solar heating during cooler months.
  • Must be glazed in accordance with Metro Performance Glass glazing instructions and to the current NZ building code.
Statement of Building Code Compliance

When specified as part of an appropriately designed and installed window or door system, Xtreme™ Low E Double Glazing complies with or can contribute to compliance with relevant provisions of the New Zealand Building Code, including:

  • B1 Structure
  • B2 Durability
  • E2 External Moisture, as part of the complete window or door system
  • F2 Hazardous Building Materials
  • F4 Safety from Falling, where specifically designed for this purpose
  • G7 Natural Light
  • H1 Energy Efficiency
Other Performance Attributes

Performance data is based on a nominal 4-14-4 double-glazed unit with argon gas and a thermal spacer:

  • U-value, Ug centre of glass: 1.1
  • Solar control, solar factor or g-value: 40%
  • Visible light transmission (VLT): 74%
  • Fading protection (Tdw-ISO): 0.58
  • Appearance: Neutral tone
  • Double glazed units are manufactured and tested in accordance with BS EN1279
  • Safety glass options are manufactured in accordance with AS/NZS 2208
  • Glass selection and installation are undertaken with reference to NZS 4223

Warranty and maintenance

  • 10 year double glazing warranty
  • Refer to the attached Metro Performance Glass warranty document and registration link
  • Maintain in accordance with the attached Metro Performance Glass care and maintenance guide

Xtreme™ Low E double glazing - performance data

Make-up mm

Heat Loss

Visibility

Heat Gain

 

Fading

           
 

Ug

U Value
Insulation value,
lower is better

VLT

Visible Light Transmission
Higher % means
more daylight
transmitted

SF

Solar Factor (g)
Lower number
means less solar
heat coming in

LSG

Selectivity
Higher number
means more
natural light and
less solar heat

Tdw-ISO

Damaged
Weighted Transmission
Lower value means better
fading
protection

4-8-4

1.6

74%

41%

1.80

0.58

4-10-4

1.4

74%

40%

1.85

0.58

4-12-4

1.2

74%

40%

1.85

0.58

4-14-4

1.1

74%

40%

1.85

0.58

4-16-4

1.0

74%

40%

1.85

0.58

4-18-4

1.1

74%

40%

1.85

0.58

Documents
Double Glazing Technical Brochure

2024

Metro Glass Double Glazing Technical Data
Declare Red List Free
Glass Care & Maintenance
Metro Performance Glass Warranty Information
Warranty

Metro Performance Glass delivers locally made, high performance glass and glazing solutions, supported by nearly 40 years’ experience and New Zealand’s largest installation capability.

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