Technically, I'm asking this on behalf of my wife.
She suffers from a condition called Raynaud syndrome, a medical condition where her toes, feet and sometimes fingers will turn ghostly white due to a restriction of blood flow to these members. The episodes are usually brought on by cold and stress, both of which are abundant at her office.
My wife wears wool socks at her desk to keep her toes warm, but often still suffers from feeling cold, and her Raynaud "attacks" are becoming more frequent and intense as of late. We've been to several doctors regarding this in the last few weeks and her Primary Care doctor just gave her a doctors note instructing that she keep a space heater at her desk to keep her feet warm.
However, her workplace has a strict no space-heater policy, and is already reluctant to allow her to have one. In fact it appears to be a policy enforced by the building owners (our company rents the building).
My question is, does her company have a legal obligation to allow her to have a space heater?
EDIT: We live and work in the state of Indiana, the United States.