What is a low-emissivity (low-e) glass?

Low-emissivity (low-e) glass is a type of energy-efficient glass coated with a microscopically thin, transparent metallic layer that reflects infrared (heat) radiation while allowing visible light to pass through freely.

How Low-E Glass Works

The low-e coating reflects long-wave infrared radiation the form of heat emitted by warm objects indoors and by solar-heated surfaces outdoors. In hot climates like India, solar control low-e glass blocks heat from outside. In cold climates, it reflects interior heat back inside, acting like a thermal mirror.

Types of Low-E Glass

  • Hard-coat (Pyrolytic) Low-E: Applied during manufacturing; durable but slightly less effective. Used in single-pane and double-glazed units
  • Soft-coat (Sputtered) Low-E: Applied in a vacuum after manufacturing; superior performance; must be used within sealed double or triple-glazed units
  • Solar Control Low-E: Blocks solar heat gain; ideal for Indian tropical climates
  • Low-Solar-Gain Low-E: Minimises heat entry; suited for warm climates

Low-e glass is an essential component of modern energy-efficient facades and fenestration. It delivers the best of both worlds excellent transparency and natural light combined with superior thermal control.

0 People have found this helpful

Similar Blogs

A letter from Albert Einstein in 2024 to young Albert

Digital Transformation

A letter from Albert Einstein in 2024 to young Albert

Aurum Logo
PropTech Pulse Editorial

15th March 2024

Evolution of Customer Relationship Management tools

Technology and Innovation

Evolution of Customer Relationship Management tools

Aurum Logo
PropTech Pulse Editorial

12th April 2024

REITs: What They Are and How to Invest

Investment Opportunities

REITs: What They Are and How to Invest

Aurum Logo
PropTech Pulse Editorial

13th November 2024

Pexo Icon

Ask Pulse Ai anything about real estate

Unlock the Latest in Real Estate

News, Infographics, Blogs & More! Delivered to your inbox.

Proptech Pulse Logo

Data that drives action.
Insight that inspires action.
Technology that empowers action.“

Made with Love

Statue

© PropTech Pulse 2026, All rights reserved.

Terms of Use and Privacy Policy