Vitotrol 100 Wired Open Therm Programmer (LV), Rooms Stat, no lead

The Viessmann CM737 is a programmable heating controller designed to control your heating system efficiently, providing comfortable temperatures when you are at home and energy savings when you are away.

Features and benefits:

• Ergonomic user interface featuring an 'OK-button.'
• Large LCD (Liquid Crystal Display) screen.
• 7-day heating program to match your lifestyle whilst maximising energy savings
• 4 independent temperature levels per day (from 5 to 35 degrees centigrade).
• Holiday button savings energy by letting you reduce the temperature for 1 to 99 days
• Built-in memory holds the user program indefinitely

Fits: Vitodens 100-W B1KA B1HA