S-SERIES | 
| SR-SERIES | Model# | Wattage | Volts | Breaker | Temperature Increase |
| Model # | Wattage | Volts | Breaker | Temperature Increase | S-60I | 6000 | 208 | 30 | 41ºF | | SR-30 | 6240 | 208 | 30 | 42ºF | S-60I | 6000 | 220/240 | 30 | 41ºF | | SR-30 | 7200 | 240 | 30 | 49ºF | S-60I | 6000 | 277 | 30 | 41ºF | | SR-30 | 8310 | 277 | 30 | 57ºF | S-70I | 7000 | 208 | 40 | 48ºF | | SR-40 | 8320 | 208 | 40 | 57ºF | S-70I | 7000 | 220/240 | 40 | 48ºF | | SR-30 | 7200 | 240 | 30 | 49ºF | S-70I | 7000 | 277 | 30 | 48ºF | | SR-30 | 8310 | 277 | 30 | 57ºF | S-80I | 8000 | 208 | 40 | 54ºF | | SR-40 | 8320 | 208 | 40 | 57ºF | S-80I | 8000 | 220/240 | 40 | 54ºF | | SR-40 | 9600 | 240 | 40 | 65 ºF | S-80I | 8000 | 277 | 30 | 54ºF | | SR-30 | 8310 | 277 | 30 | 57ºF | S-90I | 9000 | 220/240 | 40 | 63ºF | | SR-40 | 9600 | 240 | 40 | 65º F | S-90I | 9000 | 277 | 40 | 63ºF | | TO REMAIN S-90I/277 |
MODEL NUMBER CHANGE : LOW FLOW - 0.5 GPM  Model Changes - Low FLow (12.11 KB)
S-SERIES | | SR-SERIES | Model# | Wattage | Volts | Breaker | Temperature Increase |
| Model # | Wattage | Volts | Breaker | Temperature Increase | S-23L | 2300 | 120 | 20 | 32ºF | | SR-20L | 2400 | 120 | 20 | 33ºF | S-23L | 2300 | 208 | 15 | 32ºF | | REMAINS S-23L/208 | S-23L | 2300 | 220-240 | 15 | 32ºF | | REMAINS S-23L/220-240 | S-30L | 3000 | 110/120 | 30 | 40ºF | | SR-30L | 3600 | 120 | 30 | 49ºF | S-30L | 3000 | 208 | 20 | 40 ºF | | SR-20L | 4160 | 208 | 20 | 57ºF | S-30L | 3000 | 220-240 | 15 | 40ºF | | REMAINS S-30L/220-240 | S-30L | 3000 | 277 | 15 | 40ºF | | SR-15L | 4150 | 277 | 15 | 57ºF | S-46IL | 4600 | 208 | 30 | 63ºF | | SR-20L | 4160 | 208 | 20 | 57 ºF | S-46IL | 4600 | 220/240 | 30 | 63 ºF | | SR-20L | 4800 | 240 | 20 | 65ºF | S-46IL | 4600 | 277 | 20 | 63ºF | | SR-20L | 5540 | 277 | 20 | 75º F |
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