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Bard Blu4/2 is an OEM, hazardous location, wall mounted touchscreen programmable thermostat intended for precise temperature control in Class I, Division 2 (C1D2) environments where standard room thermostats are not acceptable. It is designed to provide dependable call signals for compatible Bard wall mount air conditioners and heat pumps while offering an easy on-wall interface for setup, scheduling, and day to day adjustments. For best results, confirm the exact control requirements and wiring for your specific Bard unit and jobsite classification before ordering, since hazardous area controls are selected by both equipment compatibility and the site rating.