Units in alphabetical order:
British Thermal Units / Hour --> Foot Pound / Hour --> Foot Pound / Minute --> Foot Pound / Second --> Horsepower --> Joule / Second --> Watt
 

Units in order of magnitude:
Foot Pound / Hour --> Foot Pound / Minute --> British Thermal Units / Hour --> Joule / Second & Watt --> Foot Pound / Second --> Horsepower