its an rhc tst412mdms

Check out the PDF file bellow its 4.7 MB. It has the specs on all the Rheem t-stats

There is no spec about the out door sensor for that t-stat.

Here is a link that might be useful: Rheem T-stat Specs

My Mod stat was just replaced (also, a 411). The first one had a little quirk.

It (411) can handle one remote sensor, which I have.

The Rheem Mod stats are made by White-Rodgers. They have a new stat out with the DOD feature. It looks like a Mod stat, but has no modulation capablility. There was a report that the humidity sensor seemed to be a little flaky. Since I run 1600 - 10% CFMs all of the time, I'm not disappointed with another 411. It seems to be O.K.

V

hi fast a/c service...i couldn't open the link. looks like you need a log on to view or something. as above, the manual says one remote sensor can be used either an outdoor which would be required for a heatpump or just for a display if used with a/c, or an indoor which can be used to average the temperature between two locations and run the furnace/ac based on that averaged temp. it allows you to designate priority vs the main stat. so the temperature weighting from the remote sensor can be the same, higher or lower than the main mod stat. this sounds like a great feature for REGULAR furnaces, and i'm sure some of the white-rogers branded thermostats (actually, i think they have some that can use multiple remote sensors). the rheem mod should run the fan/heat much lower, but longer maintaining much more even temps....i'm still going to hook up the remote sensor. matter of fact, i may run more than one and depending on the season, hook up a different one during the summer and change it in the winter...