on the second of the two lines (this software will only allow you to enter a
positive difference). Select whether you want to check a “Greater Than
or =” or “Less Than or =” difference. Make sure the equation you create
results in the check that you want. Some examples are provided below:
1. A user wants to activate a fan to bring in cooler outside air to
passively cool their house. This affect only works if the temperature
outside is 5°F lower than the inside temperatures. Additionally, you
don’t want to cool your house if the inside temperature is 70°F or
lower. This can be expressed as:
“IF Inside Temperature Minus Outside Temperature IS Greater Than
or = 5.0°F. AND Inside Temperature IS Greater Than or = 70°F
DONE.”
2. A user wants to activate their sprinkler system when the Daily ET
exceeds the Daily Rainfall by 0.05”:
“IF Daily ET Minus Daily Rain IS Greater Than or = 0.05 DONE”.
3. A user wants to activate environmental controls whenever the
temperature outside differs from the inside temperature by 20°F or
more. Whether it is hotter or colder outside does not matter, but if
the inside temperature is between 68°F and 72°F, there is no need to
alter the inside temperature:
“IF Outside Temperature Minus Inside Temperature IS Greater Than
or = 20.0°F OR Inside Temperature Minus Outside Temperature IS
Greater Than or = 20.0°F AND Inside Temperature IS Between 68°F
& 72°F DONE”.
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