Try here http://www.aamanet.org/

Leads only to their sparse home page. Did you intend to link to something more specific?

I got interrupted to look at a problem. Just now getting back to it.

I know k for glass is 1.04. As a manufacture of windows there are a lot of variables. Are we talking IGU's(Insulated Glass Units). The thickness of the glass, the space between the panes, the atmosphere between the glass panes, the material used to space the glass apart, is the glass treated, whats it treated with.

Was going to ask for more info.

Heat through glass is transferred in two ways: conduction and radiation. Speaking only of radiation, how much of what passes into a room through a given window or glass wall depends on the temperature of the objects outside and the IR wavelengths at which they emit. Furthermore, the transparency of glass varies depending on the wavelength of the radiation. Moreover, different types of glass transmit better or worse at certain wavelengths than other types. There are a lot of variables.

Soda-lime glass is probably the most common type of glass used for window glazing. The diagram below shows the transparency of different types and treatments of glass to different wavelengths:

This doesn't fully answer your question, I know, but your question as framed cannot be fully answered without a great deal more information from you.

Is there a specific situation or design problem you're facing, or are you simply interested in a 'general' solution?

Just want to have relation between the of amount of heat generated passing thru window with respect to outside temperature.

Hello ustrux,

Here is a cople of sites which may help.

The second one 'Solar Design FAQS' is very plain but has some great detail!

Good luck..............

CBD-39. Solar Heat Gain Through Glass Walls - NRC-IRC Fortunately all of the transmitted solar radiation does not immediately act to ... Solar heat gain through a south facing window can be significantly ...
irc.nrc-cnrc.gc.ca/pubs/cbd/cbd039_e.html - 30k - Cached - Similar pages

• Solar Design FAQs How much sun energy comes through the window? A rule of thumb says that in clear sunshine the sun sends about 1000W of heat per m² perpendicular window area ...
  www.design-navigator.co.nz/DesignFAQs.html - 24k - Cached - Similar pages

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• [PDF] Let the Sun Shine In. But Keep the Heat Where it Belongs ... File Format: PDF/Adobe Acrobat - View as HTML
  heat allowed through the window. 0.77 (77 percent). 0.60 (60 percent). 0.36 (36 percent). 0.27 (27 percent). Visible Light. –. how much daylight is ...
  www.radcowindows.com/images/uploads/2008010411133556453_ClimaGuard55-27Brochure.pdf - Similar pages

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  Passive solar design uses sunshine to heat and light homes and ... Because much of a building's heat is lost through its windows, .... Designing a direct gain system includes calculating how much window area and how much ...
  www.minimumimpact.com/twinpines/passivesolar.htm - 69k - Cached - Similar pages

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  Take care...........................

Hello ustrux,

Are you writing about Glass as a product and utility? Or are you looking for something special in particular? Do you actually want glass to buy as an insulator from a furnace for instance?

Looking at the site several years ago there is not much about glass and glazzing they do NOT know.

Have a look at this. I am still looking. They have lituture you can download and you can always email them. They are very helpful or, I should say were last time I got in touch.

I can tel you that most 'Sealed Double glazing' has leaded glass on the outside. But I would think that was also likely to be on the more 'exclusive' and expensive makes?

There is so many pages on glass. So I went to THE main Glass Manufacturer in the UK and Europe. Pilkintons. They are actually owned by Nippon, who bought them in 2006.

http://www.pilkington.com/europe/uk+and+ireland/english/default.htm

Nippon Sheet Glass (NSG)

Information for
Architects & Specifiers

Information for Trade Customers

Information for Car manufacturers and drivers

• Pilkington energiKare™ - energy efficient glazing
• Pilkington Activ™ - Self-cleaning Glass
• Glass for your home

• Pilkington Spectrum
• Our Product Range
• Download Literature
• Case Studies

Hello ustrux,

I have pasted the Industry side of glass below. I have not looked at it but you can always download it and check it out. There seems to be something different round every corner of the site. Check under Glass for Architects.

• for Architects
• Latest
• Glass Reference
• Our Product Range
• Tools
• Pilkington Spectrum
• Standards & Regulations
• Help and Advice
• PEET

• Pilkington - First in Glass \
• English \
• Building Products \
• For Architects \
• Tools \
• Pilkington Spectrum

Pilkington Spectrum

Pilkington Spectrum is a Windows-based glass performance model which enables the key properties of insulating glass units to be calculated quickly and efficiently without the need to construct and measure them.

For single glazing, insulating glass units (double, triple and quadruple glazing) and secondary glazing or double window configurations, Pilkington Spectrum is able to provide the following information:

• Light and solar properties (transmittance, reflectance, absorptance, g value, etc.) in accordance with EN 410
• Centre pane U value in accordance with EN 673 (with an option to display the U value to two decimal places)
• Sound insulation values measured in accordance with EN ISO 140-3 or generally accepted values from EN 12758
• Ultra violet (uv) transmittance and colour rendering index (Ra) in accordance with EN 410
• Other properties (e.g. pendulum body impact resistance, fire resistance, resistance to manual attack, etc.)

The database includes a comprehensive range of Pilkington products, provided by benefit-led category (e.g. solar control, thermal insulation, self-cleaning, solar control, etc.). A print facility is provided for convenience and details of the relevant technical contact are given.

Pilkington Spectrum 'on-line' is an exciting new development by Pilkington, with the following added features and benefits:

• New registration process to stay informed on program updates as well as on new Pilkington products
• All users working with the same version of the program – no risk of some continuing to use an out-of-date version
• No need to keep downloading software or updates; no need to contact your IT administrator for permission to download software from the internet
• 'Live' database, regularly updated.

New version of Spectrum online now available!

Following feedback from regular users of Spectrum online, a new improved version has been introduced. Several new features have been added, including:

• A "Copy" link introduced with pop up explaining how to copy screen to clipboard
• Flipping of coated glass in some positions, where appropriate
• Ability to add free text (e.g. project name) to print outs
• Option to change language from default (country-dependent)

Important note. To access Pilkington Spectrum 'on-line' the registration form must be completed -
CLICK HERE TO REGISTER FOR THE ONLINE VERSION

Good luck and keep us updated on how you are doing.........Please.