Manufactures ultra‑high‑efficiency vertical stacked fan coil units and unit ventilators for lodging, condominiums, student residences, assisted living, army barracks and K‑12 schools; provides air purification and positive‑pressure ventilation units for classrooms, boardrooms, 5G and industrial free‑cooling applications. Focuses on environmental stewardship and low total cost of ownership using integrated E/HRV counter‑flow energy‑recovery cores and ECM fans to minimize net energy consumption.