How to control the hair..... everywhere?

I have a large male Shep about 4 years old. My question is how do I limit the amount of hair that falls off him?

He leaves fur balls all over the house every day. I have bathed him, combed him and varied his diet, to no avail. He still loses a lot of hair. It doesn't seem to affect his coat as he is still very full coated.

We have had him just over a year now and I think we can make winter coats out of the hair we sweep up everyday.

Rob