What is the HEATKITB82 and when should I use it?
The HEATKITB82 is a heater kit that must be purchased when appliances are installed less than 6 ¼" (160 mm) apart from one another but not connected side-by-side. This kit is also recommended for use with any installation in areas that are subject to extreme humidity.
From the official Bosch B36BT935NS Refrigerator manual, page 31
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