Resideo AT87A1049 Transformer 326058-758 This advanced controller supports humidity

This advanced controller supports humidity on demand

which reduces burner stress and "rollout" spikes common in high-output boilers and heaters

With a setpoint range of 45°F to 85°F (7°C to 29°C)

Designed for the rigors of mechanical rooms

Is the 51M8701 the same as the 51M87

Resideo AT87A1049 Transformer 326058-758 This advanced controller supports humidityThe Resideo AT87A1049 Transformer is a heavy duty 48VA HVAC control transformer designed to provide reliable 120V to 24 volt power conversion for demanding residential and commercial climate control systems. Built with a NEMA Type E rating, this foot mounted transformer is engineered to power 24V air conditioning circuits, solenoid valves, and relays while meeting strict NEC Class 2 and UL 1585 requirements. With a primary voltage of 120 Vac and a