To the best of my knowledge, this one is pre-TTI. Loaded model, all of the bells and whistles. Does a nice job with carpet cleaning, attachments are near useless. Hose fights and tips vacuum over. Mostly because the attachments restrict suction causing the hose to retract. In this video it has its factory installed paper Type-Y "allergen bag. Leaks rather badly so it shall be replaced with a HEPA "cloth bag. Should improve filtration issues.
