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>> toggles heating on/off based on window sensors. Do people want this? Maybe I want both warmth and fresh air in the room? And I foresee the day where the

>> toggles heating on/off based on window sensors. Do people want this? Maybe I want both warmth and fresh air in the room? And I foresee the day where the window sensor is faulty. I'm shivering in bed as I have an argument with my furnace about which one of us should be in charge of setting the temperature in my bedroom.

Nextgrid 4y ago
It's a fail-safe against leaving in the morning for work, opening the windows, and leaving the heating on full-blast all day long as it tries to heat the outside. It matters even more now given the energy prices in some countries. Hass just sends on/off commands to a self-contained thermostat in response to window sensor state change events. If it fails, you can still manually go to the thermostat and set it to whatever you want.
- dividedbyzero 4y ago
  Are there any thermostats at all that work completely locally, i.e. without any internet access and no cloud, but still can be controlled via HASS?
  - maxerickson 4y ago
    Venstar wifi thermostats have a local API that can be switched on. https://www.home-assistant.io/integrations/venstar/ https://www.home-assistant.io/integrations/venstar/ I've not used it (I installed one because I wanted scheduling and liked that it had further possibilities and wasn't overly expensive).
  - kcb 4y ago
    Yea, your best bet for non cloud/internet stuff is to stick with Zigbee or Zwave. I have a Trane Zwave thermostat https://www.zwaveproducts.com/collections/trane/products/xr524-trane-xr524-thermostat-tzemt524aa21ma https://www.zwaveproducts.com/collections/trane/products/xr5... that’s worked well for several years. For a more advanced use case I’ve recently set it up so that the thermostat logic is within HASS. An automation driven by a binary switch helper then switches the thermostat to a fixed hot or cold value for heat and AC. Then I can feed the HASS thermostat with whatever temperature sensor data I want, like an average of multiple sensors around the house. All this is totally optional though if you just want to control the thermostat from within HASS.
- adql 4y ago
  Flip side - one sensor failure and your home is without heating, and if you so happen to be on winter vacation at the time it can possibly be catastrophical
looperhacks 4y ago
Especially in Europe, many people have radiators right under the windows. If the windows are open and the radiators aren't turned off, the cold air will come in, fall down and hit the thermostat, which will lead to the radiator running at full power because it stays cold.

Nextgrid 4y ago

It's a fail-safe against leaving in the morning for work, opening the windows, and leaving the heating on full-blast all day long as it tries to heat the outside. It matters even more now given the energy prices in some countries. Hass just sends on/off commands to a self-contained thermostat in response to window sensor state change events. If it fails, you can still manually go to the thermostat and set it to whatever you want.

dividedbyzero 4y ago
Are there any thermostats at all that work completely locally, i.e. without any internet access and no cloud, but still can be controlled via HASS?
- maxerickson 4y ago
  Venstar wifi thermostats have a local API that can be switched on. https://www.home-assistant.io/integrations/venstar/ https://www.home-assistant.io/integrations/venstar/ I've not used it (I installed one because I wanted scheduling and liked that it had further possibilities and wasn't overly expensive).
- kcb 4y ago
  Yea, your best bet for non cloud/internet stuff is to stick with Zigbee or Zwave. I have a Trane Zwave thermostat https://www.zwaveproducts.com/collections/trane/products/xr524-trane-xr524-thermostat-tzemt524aa21ma https://www.zwaveproducts.com/collections/trane/products/xr5... that’s worked well for several years. For a more advanced use case I’ve recently set it up so that the thermostat logic is within HASS. An automation driven by a binary switch helper then switches the thermostat to a fixed hot or cold value for heat and AC. Then I can feed the HASS thermostat with whatever temperature sensor data I want, like an average of multiple sensors around the house. All this is totally optional though if you just want to control the thermostat from within HASS.
adql 4y ago
Flip side - one sensor failure and your home is without heating, and if you so happen to be on winter vacation at the time it can possibly be catastrophical

looperhacks 4y ago

Especially in Europe, many people have radiators right under the windows. If the windows are open and the radiators aren't turned off, the cold air will come in, fall down and hit the thermostat, which will lead to the radiator running at full power because it stays cold.