Building retrofit. Old warehouse using hanging furnaces. New walls were added to the interior of this building. Equipment to replace furnaces included: (2) Energence LGH Sunsource roof top units, and (1) 2-stage variable speed 15GCSX roof top unit with Healthy Climate Filtration, complete with necessary ductwork. These Lennox Energence units are equipped with the option of adding up to 25 solar panels per unit, boosting efficiency to 34 SEER or better.