On Sun, 04 Feb 2007 21:17:20 +0000, Dave Fawthrop
wrote:

Has anybody got any figures on the performance of Thermostatic Room Valves?
Settings 0 - 5 = ??? degrees C
open to closed = ??? degrees C
There must be a specification somewhere.

Leaving my digital probe thermometer in one position in a room is giving me
a swing of a few degrees in temperature, and I would like to chase down the
reason for this differential.
---
It varies too much from make to make and unit to unit.

Identical TRVs here have slightly different characteristics.