Hi vikasgoyal,
Patients that are transfusion dependent need 2 units of PRBC (packed red blood cells) during 8 weeks.
As I have written before a HGB of 7 is too low for a man.
"The link between anemia and heart disease is clear: Up to 48 percent of people who have had heart failure are anemic. And of people hospitalized for a heart attack, 43 percent were found to have anemia. People who are anemic are at a 41-percent greater risk of having a heart attack or needing procedures to treat heart disease as compared to those without anemia."
http://www.everydayhealth.com/heart-health/anemia.aspx
It is dangerous to try to reduce transfusions because you don't want to be transfusion dependent. Even if your father says that he feels OK his heart is working too hard.
Kind regards
Birgitta-A