new to diy wrote:
Ok, I've just bought an IR thermometer with laser guide (IR89 -
awesome) and have began balance my rads in earnest.

I have a choice of 2 rads which could be considered closest to the
bolier. One rad has a 4 degrees C drop across it (20-16) but the
other, get this, has an increase across it (21-27)?

I'll buy that rad off you!


Have the builders
put the wheelhead/lockshield valves on the wrong way round? Would the
central heating system still work ok if this were the case?

The majority of valves these days are not sensitive to the direction of
flow, and as such you can fit them either side. The system will still
work fine.


--
Grunff