| Model No. | Switching | Included Relay | Transformer | Application | ||
| VA | Primary | Secondary | ||||
| R8239A1011 | SPDT | R8222B | 40 | 208/240V | 26.5V | For Single or Two Speed Fan. |
| R8239A1052 | 120V | |||||
| R8239B1019 | DPDT | R8222D | 208/240V | For system with F50 Electronic Air Cleaner, humidifier and blower motor. | ||
| R8239B1043 | 120V | |||||
| R8239B1076 | 50 | 120/208/240V | ||||
| R8239D1015 | DPST (One power rated, one pilot duty) | R8222U | 40 | 120V | For single speed fand and pilot duty circuit (24Vac or Millivoltage). | |