Bard 3.5 Ton (3 1/2 Ton) Straight Cool Three Phase Wall Hung Units provide rugged, dependable cooling for modular office complexes, telecom hubs, portable structures, and industrial spaces. These USA-made, 42,000 BTU self-contained systems are built to run on 208/230V or 460V three phase power and feature a bottom return and top discharge airflow layout to maximize space and simplify service access. Many models are also available with optional backup electric heat strips for supplemental heating needs. Bard’s consistent wall opening dimensions allow for quick, straightforward replacements of older units without structural changes. Family owned and operated for over 30 years, we proudly provide fast shipping, upfront honest pricing, and expert technical and warranty support.