{"id":3621,"date":"2015-11-09T23:40:58","date_gmt":"2015-11-09T21:40:58","guid":{"rendered":"http:\/\/glastory.net\/?p=3621"},"modified":"2025-11-13T16:15:01","modified_gmt":"2025-11-13T14:15:01","slug":"meet-glass-tempering-beloved-child-convection","status":"publish","type":"post","link":"https:\/\/www.glastory.net\/de\/meet-glass-tempering-beloved-child-convection\/","title":{"rendered":"Meet the glass tempering beloved child \u2013 convection"},"content":{"rendered":"

Think about your friends and colleagues. You can probably easily name the person everyone knows very well. Everybody has an opinion about him or her. That person in the glass tempering business, the kid everyone knows, is convection.<\/p>\n

For this reason, it\u2019s not surprising that we, and probably you too, hear people saying: \u201cI want a full convection furnace\u201d, \u201cIs that assisted convection?\u201d, \u201cWe want to buy a forced convection furnace\u201d, \u201cRecirculated-air convection provides the best quality\u201d, \u201cCompressed-air convection does not meet my requirements\u201d, \u201cIs this a high convection furnace?\u201d<\/p>\n

And the list of convection terms goes on\u2026 and on\u2026 and on\u2026<\/p>\n

We understand that convection is one of the most important things, and it is a good investment. But before we move forward, we have to clarify that there are two main types of convection in the industry:<\/p>\n

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  1. Compressed-air convection technology<\/b><\/li>\n<\/ol>\n
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    1. Recirculated-air convection technology<\/b><\/li>\n<\/ol>\n

      Splitting them into two sections gives you no indication of how they might perform. The titles might give a hint about the technology used to create the convection. But that\u2019s about it.<\/p>\n

      Rule of thumb? <\/span><\/h2>\n

      To be very clear, one technology is not better than the other. Which one to choose is merely an answer to the question: \u201cWhat do I want to achieve?\u201d<\/p>\n

      You see, glass does not know what technology is being used to create the convection; it only shows the efficiency of it. So, don\u2019t concentrate on the technology. Concentrate on the result since that\u2019s the only thing that matters to the glass in the end.<\/p><\/blockquote>\n

      The technology used to create the convection does not necessarily correlate with glass quality. Instead, the capability of the convection process does.<\/em><\/strong><\/p>\n

      Tempered glass quality and glass processing<\/span><\/h2>\n

      There is no direct correlation between the technology used to create the convection, regardless of whether it is recirculated or compressed air, and the glass quality. There is, however, a major difference between the different convection systems.<\/p>\n

      See the difference? The convection performance doesn\u2019t depend on the source of the convection but rather on the entire convection system \u2013 measurement, accuracy and control of the full heating system.<\/p>\n

      \u201cFull\u201d, \u201chigh\u201d or \u201cassisted\u201d are simply marketing terms for convection, which are created by tempering line manufacturers. For instance, there are no full convection furnaces because every tempering furnace in the world uses conduction and radiation alongside with convection.<\/p>\n

      Instead of the convection technology, you need to pay attention to the capability of the convection system \u2013 the repeatability, capacity, quality of the glass and reliability of the line.<\/p><\/blockquote>\n

      Learnings: <\/span><\/h2>\n