Bard 4 Ton Straight Cool Three Phase Wall Hung Units deliver heavy-duty cooling performance for modular buildings, telecom shelters, portable classrooms, and light industrial facilities. Built in the USA, these 48,000 BTU self-contained systems operate on 208/230V or 460V three phase power and feature a bottom return and top supply airflow design for efficient operation and easy serviceability. Many Bard models also offer optional backup electric heat strips for supplemental or emergency heating needs. With consistent wall opening sizes maintained for decades, upgrading to a new Bard unit is straightforward and minimizes installation costs. Family owned and operated for over 30 years, we proudly offer fast shipping, transparent pricing, and expert technical and warranty support across all Bard HVAC product lines.