What is the HEATKITB80 and when do I need it for my installation?
The HEATKITB80 (Freedom Heater Kit) is a separate purchase required when appliances are installed less than 6¼" (160 mm) apart from one another but not connected side-by-side. This kit is also recommended for any installation in areas subject to extreme humidity. (Page 22)
From the official Bosch 800 Series B36IT900NP Built-In Refrigerator manual, page 22
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