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Glass Options



Laminated IG







NOTE: Tested units include argon. The

laminate has 1/4" inner pane. Based on

Lawrence Berkeley Lab (LBL) Window

5.2 © 2003 analysis for classical UV

transmission data.

Kolbe offers numerous options to achieve the optimum energy efficiency for the geographic region in which you live.

To improve thermal efficiency, microscopically thin coatings are applied to the glass that is used in the insulated glass units

incorporated into our windows and doors. The state-of-the-art application of the LoE coating is known as sputter coating.

There are a number of coating options available, and the appropriate one should be chosen for either the specific geographic

region or building construction design required to help achieve the highest level of energy performance possible. As

standard, we use double-pane insulating LoE


-270 glass. In energy zones with a warmer climate, LoE coatings can be used

to significantly block the amount of heat transfer, reducing the load of air conditioning systems. In colder climate zones, LoE

coatings can be used to allow for high solar heat gain, resulting in reduced heating and cooling costs throughout the year.

LoE coatings also reduce the potential for condensation, as well as provide protection against fading of furniture, fabrics

and carpeting. Numerous glass options and combinations are available for different applications and various geographic

regions. Special glass requests are also welcomed.


When the weather turns frigid, LoE-180 glass is the perfect cold remedy.

It keeps homes warmer and more comfortable by blocking heat loss to

the outside and letting the sun’s heat stream in to increase solar heat





Wherever glare is a problem, LoE²-240 glass is a solution to maintain

year-round comfort in warmer climates. In summer, it blocks oppressive

solar heat gain and maintains cool glass temperatures. When winter

rolls around, it keeps inside glass temperatures warm.




LoE²-270 glass delivers year-round comfort in most types of weather.

Offering a balance of high clarity and low solar heat gain, LoE


-270 is

standard in most Kolbe products. In summer, it rejects the sun’s heat

and damaging UV rays. In winter, it reflects heat back into the room.




For warm climates, LoE³-366 delivers a balance of solar control and

high visibility. This coating helps provide protection of fading, blocking

up to 95% of the sun’s damaging rays.



ThermaPlus LoE is an additional interior coating applied to help meet the strictest energy requirements and provide

protection against heat loss and UV damage.

LoE Coatings

Argon gas is a colorless, odorless, non-toxic, naturally-occurring element that is inert, meaning it will not react with other

elements or gasses. Because argon gas has a thermal conductivity 30% lower than air, the use of argon gas in a LoE coated

insulated glass unit allows it to provide for an incremental improvement to the overall U-factor of the unit. For increased

energy efficiency, argon is supplied, at no additional cost, in all LoE coated insulated glass units, with the exception of those

units when glass dimensions are less than 14" x 14" or units that require capillary/breather tubes due to being shipped over

or installed in high altitude elevations. Units constructed without argon gas will have higher U-values.

High altitude situations occur when Kolbe double pane insulated glass units are shipped over or installed in areas that begin

at 5000 feet above sea level. For triple pane insulated glass units, high altitude begins at 3500 feet above sea level. To find

the energy performance for units in high altitude situations, use our energy database at and select



the fill option for double or triple pane glass.

Argon Gas


Kolbe Latitude