| Please identify the thermostat according to your need or just contact us! | 
| HTW-WF11-** | Code | Application | 
| -3A | Water Heating, 3A, NC+NO+Com output terminals | 
| -16A | Electric Underfloor Heating, 16A, L+N line voltage output terminals | 
| -NV | Water/Gas Boiler, 3A, 1 pair of Non-Voltage output terminals | 
| e.g. HTW-WF11-3A refers to application: Water Heating, 3A, NC+NO+Com output terminals |