Chris
Should he have a design and written calculations then? He said to me he used an online BTU calculator that he found very reliable and I did think blimey, I could do that myself (which I have many times, and his rads are either too small or marginal at best, depending on the website).
It is sounding like I need to find a respected heating surveyor and get this checked before he starts putting bigger rads in and charging me. He has said 4-6 weeks to put bigger rads in - I refused to just pay and said I'd ay the difference in cost of the rad for the lounge, dining and bathroom rads to be upgraded (not labour or other materials). Maybe others will find that the whole system is under powered and that will get interesting - I'd def need an independent report then.
Many thanks
Alex