Model B f/b alpha/numeric characters, 0.1 to 70.0 kW, see the following for individual model designations and HVAC equipment compatibilityModel BSNY-
Duct Heater
MR f/b alpha/numeric characters, 0.5 to 432.0 kW
Duct Heater
Duct Heater, model C f/b alpha/numeric characters, 0.5 to 100.0 kW, approved for close coupled installations, 25 kW maximum per square foot of duct,