From: dannyb@panix.com   
      
   In <602c5820$0$27446$e4fe514c@textnews.kpn.nl> Sjouke Burry  writes:   
      
   >On 16.02.21 21:55, 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.   
   >>   
   >> I do not understand thermostats.   
   >>   
   >> The local store does not know how to advise me.   
      
   There are (or at least were...) plenty of thermostats   
   with multiple settings that followed the time of   
   day and used a battery to operate the clock, hence   
   could be hooked up to a basic two-wire control system   
   and not worry about wiring for power.   
      
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   		     dannyb@panix.com   
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