HEAT_Q = Heat released from using the measuring device to query a particle’s spin state with no erasure of initial particle spin information.

HEAT_L = Heat released from the work of transitioning the spin axis of the observed particle to a perpendicular measurement axis.  There is erasure of initial particle spin information, which produces heat per Landauer’s principle.  

With measurement of the first member of the entangled singlet (designated ‘idler’) the singlet state instantly decoheres and the axis of spin of the as yet unmeasured member of the pair (designated ‘signal’) collapses parallel to the axis of idler, pointing in the opposite direction 100% of the time.  This is called spin anticorrelation and holds regardless of the spacetime separation of idler and signal.  This property, coupled with the thermodynamics of spin measurement allows us to communicate a heat signal near-instantly across any distance:

Sending a COLD signal (only HEAT_Q):

Sending a HOT signal (HEAT_Q+HEAT_L):