The production of this heat balance tempering furnace has already proved itself after it was installed in early 2007. The speed that it can temper glass is a real benefit to our clients. Up to 120 shower doors per day can be tempered due to its computerized controlled recipes and quick change overs for different thicknesses. The max sizes that can be tempered are 56" by 100". The minimum size is 12" by 16" and the thickness from 4mm to 19mm (3/4). This furnace allows Accurate Glass to temper our customers own glass with the proper timing.