Do you want warmth, you can both feel and see? Sight glass by Irlbacher for stoves, open fireplaces and Dutch ovens, in all shapes and sizes.
A variety of glass products are used for ovens:

Glass Ceramics:
ROBAX® is a transparent, flat glass ceramic with extremely low heat expansion. It can be delivered in a variety of designs (flat, curved, printed, coated). For use as a viewing window for stoves, tiled stoves, heaters and ovens, etc.

Stove Housing:
a variety of glass products are used for ovens. Tempered safety glass is mainly used for stove closing plate, spark and ash protection, floor protector plates or as side section. But borosilicate glass is also used for over doors and float glass is used for door handles.

Stove Accessories:
base plates, spark protection, stove cutlery, timber depot of heat tempered float glass a variety of forming and dimensions

Sealings:
sealing cords and strips of special glass fibres