What is the difference between SPST and SPDT aquastats in this application

Is this thermostat compatible with heat pumps

as a standard Pt 1000 Ohm sensor

laminar airflow for maximum heat rejection

Century Motors FML1026 Motor 30067439-890 What is the difference betweenThe Century Motors FML1026 is a professional grade 1 4 HP 1075 RPM direct drive blower motor engineered for high static pressure applications in residential and light commercial air handlers. This PSC (Permanent Split Capacitor) motor features a NEMA 48Y frame size with an open air over (OAO) enclosure, ensuring optimal thermal management during continuous operation. Operating at 115V single phase, it provides three distinct speed taps to fine tune