I have written back fully detailing all the problems no he isnt gas safe, its oil boiler. The engineer wasnt Oftec but the Boss was he came to the house for about 1/2 hour in total. And the two sides are. he did a really bad job. i told him I would pay till it worked properly. he comes says he has sorted the problems and hasnt. so now he is aggressive. All my other tradesmen have been paid for work well done, I would be a knob to pay for a system that hasnt worked from day one. he has since telephoned my other trades men to see if they had been paid which they have. out of order. he also advertises that all his engineers are oftec trained and registered which the y are not. Cowboy comes to mind.