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Internet Thermometer with Navien CH-240 heat

TheMezz
TheMezz Member Posts: 4
Hi everyone. I have a Navien CH-249 heat system.
When they installed it, they used the existing 2 wire thermostat system and all is well.
I want to replace the thermostat with one of the internet based systems.
Maybe the NEST or a HONEYWELL.

Any suggestions as to what internet thermostat I should use.

I can possible run a new line to the thermostat - if I had to .. ugh.. it's an old house, but I sure I can do it if I need more than 2 conductor wire.

Any ideas appreciated.

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