HVAC
Building Control
Fire Safety
Your friend in indoor comfort & safety systems
Home Company Services Case Studies References Agencies Daikin-Vrv Handbook Fires / Hotels Links Save Energy Contact Us
Eco Homes

Solar Water Heeating

Solar Electric Systems
Wind Turbines
Passive Solar Heating
Passive Solar Cooling
Water Conservation
Building Material
Ground Source Heat Pumps
Eco Cases
Save Energy
Solar Water Heating
Solar Electric Systems
Wind Turbines
Passive Solar Heating
Passive Solar Cooling
Building Material
Water Conservation
Ground Source Heat-Pumps
Green Hotels

Glass &Windows Selection

Standalone Systems
Grid Connected Systems
Hybrid Systems
Back-up Systems
Solar Cells
Solar Arrays
Inverters
Change Controller
Direct Systems
Indirect Systems
Thermosiphons
Draindown Systems
Pool Heating Systems
Turbines
Hybrid Systems
Grid Systems
Water Pumping
Using Wind Energy
Enviromental Aspects
Buyer's Guide
Solar Collectors
Flat Plate Collectors
Evacuated Tube Collectors
Concentrating Collectors
Transpired Collectors
Solar Control Systems
Big Hotel Fires
Hotel Fire Cases
Fire Hazard Classification
Hotel Sprinkler Systems

Hotel Fire News

Ask The HvacMan
Air Handling Units
Cooling Towers
Heat Recovery
Psycometry

Steam Generation

LowE Glass

LowE Glass

What is Low-E?
Low-E is the clear low-emissivity coating on one side of the glass that is microscopically - thin and has optically transparent layers of silver sandwiched between layers of metal oxide coatings. This specific process is known as "sputter coating" and is also referred to as softcoat. Low-E filters the suns energy in the summer and reduces heat loss in the winter. Low-E lets in visible sunlight while blocking infrared and reducing ultraviolet solar energy that fades carpet and furniture.

Low-E glass has been used for nearly two decades. Until now, Low-E has been a product usually recommended for cold climates. With our introduction of SunCoat Low-E we can use this product in the heat of Southern Nevada Desert or in the cold climate of Alaska.

What Low-E does

Winter Time TOP
The sun's energy is "short wave radiation" that passes through the window and is absorbed by carpet, furniture, etc. The energy is then transformed into long wave radiation. The long wave radiation wants to flow from warm to cool. Naturally it will try to escape through the glass. At night the radiant heat produced from furnaces, wood stoves, etc. will also want to escape out. The Low-E coating prevents this when the radiant room side heat is reflected back in to the home. This results in a lower winter U-value. For winter comfort, the higher the indoor glass temperature, the better the product is for comfort.

Summer Time
The Low-E coating manages the suns heat in the summer by reducing the amount of heat transferred through the window in the summer. The Low-E coating filters the suns short wave radiation which cuts down on the amount of solar heat gain into your home. For summer comfort, the lower the indoor glass temperature, the better the product is for comfort.

Throughout the year, Low-E reduces Ultraviolet rays which can damage curtains, flooring, furniture, etc.

What Low-E does

The Low-E allows most natural light to enter freely but reflects a significant portion of short-wave heat energy.
In the summer, long-wave heat energy radiating from objects is reflected back outside, lowering cooling cost.
In winter, internal long-wave heat energy is reflected back inside, lowering heating cost.

When heat or light energy is absorbed by glass, it is either convected away by moving air or reradiated by the glass surface. The ability of a material to radiate energy is called its emissivity. All materials, including windows, emit (or radiate) heat in the form of long-wave, far-infrared energy depending on their temperature (see Chapter 2). This emission of radiant heat is one of the important components of heat transfer for a window. Thus reducing the window's emittance can greatly improve its insulating properties.

The solar reflectance of low-E coatings can be manipulated to include specific parts of the visible and infrared spectrum. This is the origin of the term spectrally selective coatings, which selects specific portions of the energy spectrum, so that desirable wavelengths of energy are transmitted and others specifically reflected. A glazing material can then be designed to optimize energy flows for solar heating, daylighting, and cooling.

A glazing designed to minimize summer heat gains, but allow for some daylighting, would allow most visible light through, but would block all other portions of the solar spectrum, including ultraviolet and near-infrared radiation, as well as long-wave heat radiated from outside objects, such as pavement and adjacent buildings. These low-E coatings still maintain a low U-factor, but are designed to reflect the solar near-infrared radiation, thus reducing the total SHGC while providing high levels of daylight transmission

Back to Glass&Windows

 

 
 
Google
 
Web www.iklim.com
  Discuss on the Message Board
   
 
  http://www.iklimnet.com
 
Book & Magazine
Interstate Bank Fire
Beverly Hills Club Fire
MGM Fire
Firehause Magazine
Special Fires
Hotel Fires
Ship Fires
Industrial Fires
Warehouse Fires

Restaurant/Nightclub Discotheque-Fires

High Rise Fires
Fires
Fires ABC
Big Building Fires
Book About Fires
Fire Stats
Fire Board

Books About Fires

Hotels
Enviroment
Energy Save
Hotels & Legionella
Green Hotels
Hotel Design Books
Control Software