In an earlier contribution to this discussion,
The Natural Philosopher wrote:


strictly you should take your target room temp - say 20C - subtract it
from both rad temps, and then use that..so 60-20=40, and 50-20=30, so
output will be 35/40 or .75..

No! A dT of 60 imples a mean radiator temperature (never achieved!) of
around 80, and 50 implies around 70 (more easily achieved).

[I think your subsequent post indicates that you have seen the error of your
ways]
--
Cheers,
Roger
______
Email address maintained for newsgroup use only, and not regularly
monitored.. Messages sent to it may not be read for several weeks.
PLEASE REPLY TO NEWSGROUP!