Rad delta T with wc.

[Harvest Fields]

I like a man who does it long hand

Mines all short hand

 

[ShaunCorbs]

If you want a cheap quick one , Mr combis are ok .
However I have just worked our new bedroom heat loss / rad size etc etc , I did mine long hand and know it was right ( F1 F2 etc )and then compared it to the Mr Combi , quite a bit of difference.

whose was higher ?

 

[townfanjon]

whose was higher ?

Mine , but I didnt work the bedroom at 18 , I used 21 because nobody in our house can shut doors . So I calc it all at 21 .