Author Topic: Automating a whole house exhaust fan  (Read 49 times)

Offline hmspain

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Automating a whole house exhaust fan
« on: August 13, 2018, 01:11:00 am »
Hardware:

1) Whole house exhaust fan plugged into a Z-Wave outlet
2) Aeon 4-in-1 sensor (outside for temperature and humidity)
3) Aeon 4-in-1 sensor (inside for temperature)
4) Vera Plus controller (for the programming)
5) Ecobee thermostat

Vera ON script; Turn exhaust fan ON when ALL of the following are true (and condition);

1) Aeon 4-in-1 sensor outside air temperature less than 72 degrees (only pull in cool air).

2) Aeon 4-in-1 sensor outside humidity less than 75% (don't pull in overly humid air).

3) Aeon 4-in-1 sensor outside humidity greater than 30% (don't pull in overly dry air).

4) Aeon 4-in-1 sensor inside temperature greater than 72 degrees (turn on exhaust only when needed).

Vera OFF script; Turn exhaust fan OFF when ANY of the following are true (or condition);

1) Aeon 4-in-1 sensor outside air temperature greater than 72 degrees (too warm outside to help much).

2) Aeon 4-in-1 sensor outside humidity is greater than 75% (too humid).

3) Aeon 4-in-1 sensor outside humidity is less than 30% (too dry).

4) Aeon 4-in-1 sensor inside temperature is less than 72 degrees (turn off exhaust when cooling is no longer needed).

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Vera ON script; Ecobee set to AWAY when fan is running.  This can be done with the standard Ecobee Vera app.

Vera OFF script; Ecobee RESUME  when fan is off.  The Ecobee app does not support a resume function, so this has to be done via LUUP code (replace xxxx with your device number);

local service_id = "urn:ecobee-com:serviceId:Ecobee1"
local action = "ResumeProgram"
local args = {resumeAll="true"}
local dev_num = xxxx
luup.call_action(service_id, action, args, dev_num)

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Outside Aeon 4-in-1 needs to be more responsive than default.
111=300 4 byte Dec
113=300 4 byte Dec
101=225 4 byte Dec
VeraPlus, Nest Cameras (6), Siren, Hue Bulbs/Strips/Blooms (65), Fan Dimmer (6), Aeon 4-in-1s (10), Water Sensors (3), Z-Wave Switches (20), Nest Smoke/CO Protects (5), Ecobee 3, HEM Gen2s (2)