I have two Water Furnace geothermal heatpumps with a standard WF thermostat. I would really like to upgrade to a Wifi enabled thermostat. They are WF Envision 5 Series and the specific models are: NDV049A141NTL and NDV038A111NTL. They were installed in 2011. I spoke to WF and they said that our model are NOT compatible with their Symphony upgrade, which was the only Wifi thermostat they sell. They had NO after market recommendation and told me to contact my dealer, which I have done and waiting to hear back. I have researched this quite a bit myself and keep looking at Honeywell wifi thermostats which claim to be geothermal compatible with a "c" wire, which I have. My concern is that I find conflicting data on the Honeywell wifi thermostat compatibility. So, my question is; Does anyone have experience with a specific thermostat that IS compatible with my WF models? If so, please reply and let me know the brand and model number. Obviously, I don't want to buy something that won't work and worse yet cause damage to our WF units. Thanks.
I have used and would recommend the PRESTIGE® IAQ THERMOSTAT WITH REDLINK. It's got great professional-level control algorithms. It will work with 2-stage geothermal heat pumps. The touchscreen stat is great looking. It has a wireless equipment module, so you only need power to the stat (2 wires). You can buy a WiFi gateway for remote access. You can also buy a portable stat to carry around the house and it will control the temp from that. You can also get a wireless outdoor temp sensor and control the system operation from that (AUX heat lockout, etc.) Currently, I'm using a WF7 with Symphony.
Thank you for the recommendation. I have been looking at the Honeywell Vision Pro 9000 model TH9320WF5003. Any experience with this one?
Sorry. I have no experience with the Vision Pro 9000. I do know that the Prestige has numerous settings that you would want for geo: geothermal specific equipment setting, the ability to set the temperature differential at which the system switches stages, controls to lockout AUX based on outdoor temp, adaptive recovery from setbacks, etc. I don't know if the 9000 has any of that. I know many of the lower-end Honeywell thermostats do not include these features, and will do bad things, like engage AUX heating if the thermostat changes by 1 degree. I've heard Ecobees are decent, but have no experience with them.
