Hair is not what people are allergic to. Dander is the problem. Heavy shedders can be fine for people with allergies. I suggest they try the dog on a different diet and maybe try a new dog shampoo before getting rid of the dog.

No specific breed is good for people with allergies. All people are different. I am fine around almost all dogs, but around shepherds and huskies I sneeze a lot. If they want a dog then he should ask to spend time with that breed or that dog to see if his allergies act up. Even individual dogs of a breed can cause different reactions. A poodle (supposedly a low allergy breed) fed a cheap brand of food might make him sneeze up a storm while another poodle fed a quality diet won't cause any reactions.