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Sub-Zero Classic (BI) vs. PRO 48 and PRO 36 Series Refrigeration Comparison


  • What is the difference between a Classic (BI) unit and a PRO4850 and PRO3650?
  • Selling point differences between Classic and PRO models
  • Selling features of Classic vs PRO models
  • PRO 48 and PRO 36 versus Classic differences


The key differences between the PRO Refrigeration (PRO4850 and PRO3650) and the Classic lines are as follows:

  • PRO Refrigeration models have a more "industrial" look of a commercial kitchen than Classic models.
  • With PRO models, the presence of the refrigerator in the kitchen is more apparent.
  • If a freestanding unit is needed or the sides of the refrigerator will be partially exposed, Sub-Zero recommends the PRO line.
  • The Classic line expands on the traditional look that Sub-Zero has had for decades.

Feature and measurement differences:

FeatureClassic (BI)PRO
Available Widths30”, 36”, 42”, 48”36", 48"
Unit OrientationOver/under: One freezer drawer.
Side by side: One door each side.
PRO4850: Two doors, four drawers.
PRO3650 units: One door, two drawers.
Control PanelIlluminated touch control.Interactive touch screen control.
Compressor or Grille LocationTop of unit.
Flip up for easy access.
Top of unit.
Flip up for easy access.
Toe Kick4” toe kick.4" toe kick.
Rough Opening Depth24” for Standard.
26 3/16” for Flush Inset.
25” for Standard. Flush inset is not possible for PRO models.
RevealStandard has no reveal.
Flush inset has a ½” reveal.
No reveal.
Side PanelsStainless steel or custom option. Attachment instructions available.Stainless steel available as a sales accessory.
External DispenserAvailable on SD model.Not available.
Matching Wine Storage UnitWS-30, BW-30None.
Same Side Hinge for Dual InstallationMinimum 2" filler recommended.Dual installation kit is available as a sales accessory
Standard InstallationCan be installed standard.Standard install only.
Water FilterAll BI SeriesAll units
36" All Freezer Model?BI-36FNone.
Glass Door Model?BI-30UG, BI-36RG, BI-36RGPRO4850G, PRO3650G
Drawer Model?Not available.Not available.
Wrap-Around Stainless Steel DoorsAll /S models
(Unit comes from factory with stainless steel doors.)
All units. No custom panel option is available for PRO.
French Door Model?BI-36UFD, BI-42UFDNot available.
Spill-Proof ShelvesFramed glass contains small spills.Framed glass contains small spills.


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