Cosy bedroom with bed, chair, and floor to celling windows overlooking a garden

Low E Glass

Low E Glass

Super charge your homes energy efficiency with Metro's Low E double and triple glazing.

What is Low E Glass?

  • What Low E means: It's short for "Low Emissivity" glass.

  • Energy efficient: Low E glass is very energy efficient with a special coating that lets in light while retaining heat inside to help maintain indoor comfort levels.

  • Reduce power bills: Metro Low E glass can reduce heat loss by up to 61% compared to standard double glazing which will help save you money on your power bills.

  • Helps reduce risk of overheating: If overheating is an issue for your home in the hot summer months, choose from our two solar control glass options - Xtreme™ Low E or SunX™ Grey Low E, both help reduce solar heat by up to 58% when compared to standard double glazing. They also keep your home warmer in the colder winter months.

  • Lets in natural light: Visible Light Transmission also called "VLT" is a measure that tells you how much natural light is coming through the glass. Each of our Low E glass lets in different levels of light, from Xcel™ Low E that lets in 80% of visual light, to Xtreme™ Low E that lets in 74% visual light - both are perfect for creating naturally light filled spaces.
    SunX™ Grey Low E is our highest solar control glass, letting in 42% of visual light - this specialist solar control glass is great for hot and sunny locations, and rooms that experience glare.

  • Crafted for New Zealand conditions: Our selection of Low E glass is tailored to suit New Zealand conditions, offering a variety of performance benefits to cater to your specific priorities.

How Low E double glazing works

Benefits of Low E double and triple glazing?

  • Warmer home in winter - Low E glass gives your home up to twice as much heat retention as standard double glazing, keeping the heat inside and the cold outside.

  • A cooler house in summer when you choose a Low E glass with solar control, it helps reduce heat gain from the sun, that can overheat your house, while also insulating your house from the temperature outside in winter. And because there is less need for cooling systems, you'll be reducing energy consumption, which saves on your power bills and helps the environment.

  • Lower power bills - because there is less need for heating and cooling power use, you'll be reducing energy consumption, which saves on your power bills and helps the environment.

  • Reduced condensation. Condensation is that “crying look” that single glazed windows get. This is a serious problem, it causes mould and mildew, and damage your family's health.

  • Better resale value of your home. Having a more thermally efficient home, will improve the feel of the home and reduce its energy usage.

Warranty & glass care

To register a warranty or find out more about the warranties we offer.


For handling, care and maintenance information.

Glass Care & Maintenance

Benefits of Low E Glass

High Thermal Performance

Keeps you warm and cozy in winter

Solar Control

Helps protects from overheating in summer

Reduce Power Bills

Use less power for heating and cooling

Fading Protection

Help protect furnishings from fading

Reduce Condensation

For a warmer, drier and healthier home