Hi FORESTA,
For this model, the refrigerator is 35 3/4" wide, so a doorway of about 36" or wider is generally recommended. For the best fit and installation experience, a professional installer can help confirm the required clearances.
For complete dimensions and installation specifications, please see:
https://images.samsung.com/is/content/samsung/p6pim/us/rf28r7201sr-aa/specsheet/us-specsheet-rf28r7201sr-aa-550283818.pdf
Glad this helps.
Nicole
Samsung Care