Small Thermocouple (Updated 12/02/2010)
One of these will go in the inflow water piping. One can go in the ducting before after the HEX and then one can go in the exhaust ducting. We will need to use a 2" one for the wet bulb though so go ahead and just put two in to indicate that there will be a dry and wet bulb in the exhaust.
4" Thermocouple (Updated 12/02/2010)
Four of these can go in the chamber at heights of ~3" and ~9"