Agree with Sonya, our fridges store reagent and blood products, so our range is 2.5-5.5 as well. I recall that autologous units that were "biohazard" because the donor was Hep C pos or something like that should be sequestered to their own area, and besides the BB knowledge of segregating certain things, I don't believe there is any rule about what can and cannot be in the same fridge.
If you're talking about utilizing a fridge in or near the OR to store blood products for these transplants, then you just need to be sure the fridge is rated for storing blood products. Any old Frigidaire may not hold temps accurately throughout the whole fridge, which is what our OR attempted to get! We bought them an actual BB fridge (Helmer undercounter), and kept it specifically for blood only.