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General| Model | RTHL221 Series |
|---|---|
| Type | Non-Programmable Thermostat |
| Power Source | Battery |
| Stages | 1 Heat / 1 Cool |
| Backlight | No |
| Programmable | No |
| Hold Feature | Yes |
| Filter Change Alert | No |
| Temperature Range | 40°F to 90°F |
| Display | LCD |
| Compatibility | Single Stage Heating and Cooling Systems |
| Battery | 2 AA batteries |
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