Lennox 7.5 ton RTU Model TGA090S2BS1Y SOLD Lennox 7.5 ton roof top unit, model TGA090S2BS1Y, 208/230 volt, 3 phase, with economizer, manufactured in 2008, working great when removed to reconfigure a retail space. Asking only $1500. Lennox model TGA series RTUs. By Direct | November 14, 2013 | Used Equipment | 1 Comment | Read more