Rate of Rise in a garage?

[ano]

Is it acceptable to use a rate-of-rise heat sensor in a garage?  Its in AZ so I have sensors rated for 194 degrees for attic and possibly garage, but I was thinking when you brought a hot car into the garage, that might rise the temp pretty fast, triggering the sensor. Is this a concern?  The instructions don't say anything about this case. I have a gas water heater out there, so that is the reason for the sensor.

 

[Del91574]

Fine.
 
15 degrees per minute.....if you're going to exceed that, then you're going to trip the ROR.  A car generally isn't going to heat up the ambient that fast.
 
Temperature for the installation should generally be 15 degrees above the highest ambient possible.

 

[ano]

OK thanks. I'm hoping 194 degree will work in the attic. It can get REALLY hot here, but I assume they have taken that into account since that is the highest temp I have found. I won't mount it directly over the furnace. I've never measured the attic temp in the summer, but the AC guys told me they do install systems all summer. I don't know how they do it.

 

[Del91574]

if you hit about 194 in "habitable space" or an attic, you've got a bigger problem. The next highest value, your house would be in outer space before it tripped.Trying to find the listings with the color codes.
 
Attics, maybe 20-30 above ambient is common. Spent way too many years up in them.