How to turn on all fans when thermostat reaches a certain temperature?

[RBoy (www.rboyapps.com - Making SmartThings Easy!)]

As @jkp mentioned, WebCoRE is very powerful but I get that many folks are intimidated by the awesome world.

We often recommend folks to use CoRE for simple automations, it’s learning curve us much shorter and has the feel of a regular SmartApp.

Alternatively, if you have access to RBoy Apps check out this app which allows you to use fan/thermostats and other devices to “control” your temperature. Basically you can set a temperature threshold to trigger turning on a fan or other cooling appliance (and vice versa).

[RELEASE] Humidity and Temperature Management with Scheduling (homes without HVAC/thermostats / using heaters and cooling appliances / vacation home / remote homes)

Humidity and Temperature Management with Scheduling Automatically manage and schedule the climate (humidity and temperature) for your rental homes and vacation homes using HVAC’s, heaters, coolers, fans, humidifiers, dehumidifiers and more appliances. Also useful for older homes without a thermostat or for rooms which have heating and cooling appliances in them with no HVAC or homes with WiFi thermostats. See below for a full list of features: [IMG_4196] [IMG_4197] [IMG_4199] [IMG_4200] [IMG_4201] [IMG_4203] FEATURE SUMMARY: Use different devices to control temperature Thermostats Heaters Cooler/fans Use different devices to control humidity HVAC’s Humidifiers Dehumidifiers/exhaust fans Temperature Management Set high/low temperature thresholds Set high/low humidity thresho…