What is Energlaze?
Energlaze is a new generation of energy efficient window glass that uses an advanced coating to retain more internal heat and to absorb free energy from the sun, designed for use in a double glazed unit.
Using the latest technology, Energlaze has a unique combination of metallic layers, which reflect heat back into a room, to keep heat within a building. At the same time maximising the amount of natural light. As more heat is retained, it means less is required to warm up the home to the desired ambient temperature, in turn lowering energy costs.
What causes External condensation on Windows?
From time to time, we receive enquiries about the appearance of external condensation on glass. This is a naturally occurring phenomenon which is more prevalent the more highly insulating your windows are and is not a fault in the glass or window.
Moisture condenses out of the air onto a cold surface that is said to be below the dew point. The dew point varies with the air temperature and the amount of moisture it contains. Particularly in spring and autumn, the glass temperature can fall to a low level during the night and the dew point can be comparatively high in these seasons. The glass temperature can be below the dew point under these conditions and moisture can condense onto the surface.
In order to save energy, maintain a comfortable internal environment and satisfy building regulations requirements, the windows we fit in our homes are much more thermally efficient than in the past. With single glazing and older style double glazing, a large proportion of heat was lost to the outside through the glass. With modern low emissivity glass, more of the heat is kept inside and the outer pane is not heated as much.
The more thermally insulating the glass is, the lower the outer pane temperature is likely to be and the greater the risk of condensation on the external surface. In northern European countries, where levels of thermal insulation are higher than in the Ireland, the phenomenon is understood and accepted.
There is not much that can be done to avoid the risk of condensation to the outside. In many cases the condensation does not last long. A little heat from the sun warms the outer glass enough to evaporate the moisture and a gentle breeze or wind will help.
You may notice that not all of the panes are affected by early morning condensation, even in the same window. Subtle differences in orientation and the position of objects outside the window can change the surface temperature of the glass to the point that one pane suffers and another does not. Any object such as a canopy or tree blocking off the window to a clear night sky will also reduce the effect.
The plus point is the knowledge that your windows are keeping the heat in as they are designed to do, proving that you have a superior insulating glass product.
This is a naturally occurring phenomenon which is more prevalent the more highly insulating your windows are and is not a fault in the glass or window.
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Why should I have Energlaze installed in my windows?
There are a number of reasons why you should have Energlaze installed in your windows. Firstly, Government Building Regulations require us to use energy efficient products that help to reduce CO2 emissions and protect the environment. Energlaze technology ensures that your new glass will be the most energy efficient window glass available. Using Energlaze is an easy and efficient way of complying with these regulations whilst offering a number of other benefits:
- Free Solar Gain – Energlaze uses advanced coating technology to capture free energy from the sun to help heat the home.
- Thermal Insulation – The advanced inner coating reflects heat back into the room, meaning less energy is needed to heat the home to the desired temperature.
- Eliminate Condensation – Energlaze helps to virtually eliminate internal condensation, reducing draughts and cold spots in and around the windows.
I have double glazing; does this mean my windows are energy efficient?
Of course all old, uncoated, double glazing offers a limited level of heat retention. However, Building Regulations now state that an energy efficient window glass must be used in the replacement windows and a double glazed unit containing Energlaze double glazing units is up to 70% more thermally efficient than standard non-coated double glazing
Is the coating on the glass permanent?
Yes, the coating is permanent and hermetically sealed with the glass unit so will last the lifetime of the window.
If Energlaze lets the sun in, does it let anything out?
The glass has a very thin, transparent metallic coating that reflects heat back into the room, rather than allowing it to escape through the windows. At the same time it allows heat from the sun to pass through the glass to warm the room, meaning it takes less energy to maintain a warm, comfortable home.
Will the coating effect the appearance of the glass?
No, the coating on Energlaze IGU’s is completely transparent and microscopically thin. It is designed to match the rest of the glazing in your house.