From: forgetthismailbox@gmail.com   
      
   Hello, Olden!   
      
   On Tue, 16 Feb 2021 12:55:07 -0800   
   Olden  wrote:   
      
   > Best to ask here or ?   
   >   
   > My gas furnace is a Holly.   
   > It has an old mercury two wire thermostat.   
   >   
   > I want to change the thermostat so that I can set the same two   
   > temperature ranges, day / night, for every day.   
   >   
      
   Just an idea: you can use two thermostats and mechanical 24 hour timer to   
   switch them. Something like that: https://www.theben.de/en/syn-161-d-1610011   
   Timers can be different, with different outputs (output relay ty   
   e/voltage/current, etc), this is just    
   an example. If you do not need precision time keeping on power loss, it's   
   preferable to use a timer without battery (no potential battery leaking out).   
   I do not know your schematics and may be any safety limits, so it's just an   
   idea.   
      
      
   ------   
   With Best Regards,   
   Evgeniy   
      
   --- SoupGate-Win32 v1.05   
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