A 58-year-old man with a history of chronic heart failure presents to the clinic for follow-up. He reports that he gets short of breath when walking around the house or performing simple tasks like cooking and doing light chores. He no longer attempts activities like grocery shopping due to the severity of his symptoms. However, when resting or sitting down, he feels fine and does not experience shortness of breath. What is his NYHA Functional Classification for heart failure?
