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The Schneider Electric MK4-3121 is a commercial-grade pneumatic damper actuator engineered for precise proportional control in complex HVACR systems
This is an OEM replacement for specific Rheem-Ruud configurations
eliminating mounting guesswork
Secure Panel Mounting: Features a rugged design to prevent loosening from compressor-induced vibrations
Peco Controls TW180 Thermostat 321142-301 The Schneider Electric MK4-3121 isThe Peco Controls TW180 Thermostat is a high performance multi fan fan coil thermostat engineered for precise temperature management in PTAC and fan coil applications. Built for professionals, this controller handles line voltage and low voltage systems ranging from 24 VAC up to 277 VAC. Whether you are servicing 2 pipe or 4 pipe fan coil configurations, the TW180 provides the versatility needed for commercial retrofits and new installations in
