4235 Braeburn 3 Heat / 2 Cool Programmable Premier Model Thermostat (Old 5220) The 5220 has been replaced by the 4235. Upgrade your comfort system with the Braeburn 4235, a versatile programmable thermostat designed for both residential and light commercial applications. Whether you’re controlling a heat pump, furnace, or hydronic zone system, this thermostat delivers serious flexibility in a sleek, user-friendly interface. The Braeburn 4235 is a versatile, feature-rich thermostat from the Premier Series, designed for both residential and light commercial applications. Here’s a breakdown of what it offers: 🔧 System Compatibility Supports 3 Heat / 2 Cool for conventional or heat pump systems Compatible with gas, oil, electric, and millivolt systems Works with 2- or 3-wire hydronic zone systems ⚙️ Features Programming Options: 7-day, 5-2 day, or non-programmable Display: Large 4.4 sq. in. bright blue backlit screen Power: Battery or 24VAC hardwired Auto or Manual Changeover Humidity Control: Built-in humidification and dehumidification with overcooling Dry Contact Input: For occupancy sensors, condensate switches, or door contacts Remote Sensor Ready: Indoor or outdoor SmartLimit™ temperature limits with installer lockout Adaptive Recovery Mode (ARM™) for efficient temperature transitions Programmable and Circulating Fan Modes Multi-level keypad lockout for tamper resistance 📏 Dimensions 4.25" H × 5.12" W × 1" D It replaces older models like the 5220 and 5320, making it a solid upgrade path.