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toaster oven glass

 
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Is the glass on a toaster oven door suitable for a looking glass into the front of a rmh? Can it withstand that much heat?
 
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Location: Kansas Zone 6a
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a 6x12 piece of woodstove glass is $30 at onedayglass.com (just the first google hit). That is the good 1200 degree ceramic stuff.

I am not sure if a fireplace door is that good of glass, but they can be had for $5 or less at garage sales and habitat re-stores (goodwill/salvation army for building materials).
 
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Location: Currently in Lake Stevens, WA. Home in Spokane
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I do not believe that a toaster oven glass door would work.

It is not so much the heat, as the direct flame that worries me.
Even Corning Ware tells you to avoid direct heat, and CW is probably a higher grade of glass than an oven door.

 
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Location: Livermore, CA
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Good advice R Scott. Point of information: fireplace glass doors are almost 100% tempered glass. I've never heard of ceramic being used in a glass door set. Tempered glass will abruptly and dangerously shatter when overheated. Customers have told me it sounds like a rifle shot, with glass pieces landing 15' - 20' away. Not a good situation if the kiddies or pets are in the way. I'm not sure what toaster oven glass is...it may even be like the Corning ware glass, which is not an approved material for what you are describing.
 
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McMaster Carr sells the glass. I used the one they sell for over two years now in rmh without any problems. Thanks Nick.
 
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