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The Bard 8620-230 Enthalpy To Dry Bulb Kit is an OEM control conversion accessory used with Bard economizer-equipped wall-mount units to change the outdoor air changeover strategy from enthalpy-based decision making to dry-bulb temperature changeover. This kit is typically applied when you want economizer operation based on outdoor air temperature only, helping the unit allow free cooling when outdoor conditions are cool enough while locking out economizer when they are not. As a genuine Bard replacement kit, 8620-230 is built for proper fit with Bard economizer controls and is a solid choice when servicing an existing economizer system, standardizing controls across a site, or replacing a failed sensor setup. Confirm compatibility by matching your unit model, economizer type, and the Bard service literature before ordering.