Balancing temperature between attic and 2nd floor

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    Flair Customer Support

    Hi Igor,

    First, you'll need at least one Puck in your Flair home. This Puck is connected to your home WiFi and plugged into power. We call it a "Gateway Puck" or hub. You'll place your Puck in the Attic.

    When running through App Setup, do the following:

    • Setup your Gateway Puck
    • Integrate your Nest
    • When configuring Flair, create two rooms: Attic and Second Floor
    • Assign the Puck to the Attic room, along with the Smart Vents
    • Assign the Nest to the Second Floor room

    At the conclusion of Setup, you'll be asked if you want Flair to control your Nest. You want this. You can always configure it later in the "Set Point Controller" setting, located in the Flair app menu under Home Settings->System Settings. You want it to be "Flair App". See Set Point Controller.

    When the attic is in use, set the room to Active in the Flair app. Flair will use the readings from the Puck to control the Smart Vents and keep it comfortable. If you want the Puck in the Attic to drive the Nest, then set the Second Floor room to Inactive. If you want Flair to use the average temperature of the Attic and the Second Floor to drive the Nest, then leave the Second Floor Active.

    When the Attic is not in use, set it to Inactive - and make sure the Second Floor is set to Active. Flair will close Vents in the Attic and use the temperature from the Nest to drive the Nest.

    All the best,

    Finn

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    Igor N.

    Let me slightly rephrase - I am looking for functionality to maintain a 'special room'

    - When Room is active - vents are open, Nest sensor in that room will be used
    - When Room is NOT active - vents are closed. Nest main thermostat will be used to sense temperature.

     

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    Matt

    With the attic vents open, if the Nest is driving the temp off the 2nd floor sensor only, does the attic get to a comfortable temperature fine?  Or beyond a comfortable temperature?  Or, does the Nest need the attic sensor to call for service?

     

    If it's the first two, I would just create two schedule in Flair.  One that's the temp you want when in use, and one that's the temp you want when not in use.  Just picking the active schedule would cause the vents to open close to that target then.  In the winter say an in use of 70 and a not in use of 50.  As long as the second floor is running the heat for the second floor anyway the vents would stay open until that temp is reached then close after it.

    If you need the attic to call for heat when the second floor wouldn't already be calling for heat, then you need to change the sensors in the Nest too.

     

    There's probably lots of other ways you could do this too.  Depending on if you want Nest or Flair to control when equipment runs.  Some with them not integrated like above and some where they are.

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    Igor N.

    This house originally had only one HVAC system that is still serving 1st and 2nd floor. At some point, another system was added serving 2nd floor and Attic. 

    The attic space is relatively small  (and probably poorly insulated), under recent weather conditions (~20-30 F outside) with the attic vents open and Nest driving the temp off the 2nd floor sensor only,  the system will run for ~15 min every hour, and the temperature at the attic will go up 5-10 degrees over the setting and then cool down 5-7 degrees under the settings.

    I assumed, that I will select the temperature sensor manually and control vents using Puck,  but it looks like the option to control vents is only available from the app and you have to do it one by one.

     

     

     

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    Matt

    It's hard to tell all the details, but I would try this:

    When not using the attic space for people, set the Nest to use the second floor sensor.  Create a schedule in the Flair for the attic with the puck and vents to some lower temperature you want to be the max in the attic when nobody is using it.  That will open the vents when the attic is below that much lower temperature and close them when it gets above it.  Since this is a much lower set point than the second floor and Nest are using, it'll mostly get excess heat from the second floor and close off to keep more heat in the second floor generally.  If there's enough heat leakage from second floor to attic even with the vents closed, the attic may never get below the Flair schedule set point and never open.

    When using the attic for people, set the Flair to a different schedule with a temperature you want the attic to be.  This will open the attic vents until the attic is warm enough.  The Nest setting is slightly more complicated.  If having the attic vents open so heat is going to the attic causes the second floor to request heat often enough then you don't have to do anything.  If it doesn't, you would need to update the Nest to use either both or at least the attic sensor to determine when to run.

    For both of these, Nest and Flair are not integrated.  Flair is just limiting how much air goes to the attic based on the Flair schedule.  It's really easy in the app to change the active Flair schedule too.

    Since the attic space overshoots with the vents open now, this should close them to reduce the overshooting.  That may have a side effect that it then cools to much before the heat comes back on then.  You can set the Flair to any value, doesn't have to match the Nest, so maybe set it a few degrees higher to allow some overshoot.

     

    There's a bunch of other ways you could configure this including different integration options and getting an additional puck so Flair could drive everything instead of Nest.  It didn't sound like you needed something like that though. The above is probably the simplest scenario.  If you pick a really really low temp for the first schedule, they'll never really open too.

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    Sal

    I would explore the active and inactive method for the flair pucks. I currently use this function and it works flawlessly.

    Puck+vents in attic,  puck+vents on 2nd floor. Flair-Nest integration. I think the nest sensors are making your setup more complex than it needs to be.

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