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What is the frame size of the 621720 motor
Dual Fuel Versatility: Fully rated for both natural gas and propane gas configurations
though it can function in other orientations depending on the application
What is the sensing bulb made of
the gate provides friction-free movement for sensitive draft stabilization
Lennox 21L91 Motor R-410A What is the frame sizeIf you are looking for a reliable 4 speed replacement for Lennox air handling units, the Lennox 21L91 blower motor is the specified OEM component for the job. This 1 4 HP 115V blower motor operates at a nominal 1075 RPM and utilizes a permanent split capacitor (PSC) design to maintain high electrical efficiency during continuous duty. Engineered as a Lennox 21L9101 direct replacement, this motor features a 48Y frame size, a standard 1 2 inch x 2. 2