The only time I've heard of anyone attempting to get all of these energy star credits was 5 years ago when my brother in law built his house. He did everything that was spelled out. Had an inspector come and validate the heat loss and ventilation even. The inspector was very impressed with his hydronic heat, extreme insulation and sealing of the house. Was all set to give him the OK until he saw the heat source aside from the downstairs oil boiler, a dreaded nasty OWB. Until that boiler was disconnected permanently there would be no tax credits.
Still isn't to this day but his house is pretty warm. Just more jumping through hoops, that control mentality.