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Model Siemens RDH10
Mounting Surface-Mounted
Power Source Battery
Compatible Product Central Furnace
Voltage Type Line Voltage
Brand Siemens
Voltage 24-250

Check the listing for details. Siemens RDH10 Line Voltage thermostat Digital Room. Condition: Open box. Listed at 64.95 USD. Purchased new and never used. Box shows shelf wear. Thermostat is new. Never installed. Purchased in Europe. I purchased this specifically for heating system that sent full line voltage to thermostats. I could not use regular thermostat. This was only digital line voltage thermostat I could find at the time. I ended up rewiring thermostats to 24V and was able to put in programmable model. If you still have full line voltage to your thermostat. This is what you need.

$32.48
$64.95