It took a while to find a way to manoeuvre the stove and chimney in underneath the main chimney we had installed months ago , but finally we got it into place and sealed with flue putty . Once the carpet was down , we had furniture to move and a good deal of fluff to hoover up before we could settle down for supper , and a cosy evening in front of a blazing fire ! On Wednesday we set about completing the heating system - it should have been a relatively simple task , but it seemed that at every stage we were beset with minor problems and leaks . Each was solved in turn , but it all took precious time .

Question: How difficult was the installation of the heating system ?
Answer: None of the above choices .There had been some minors problems , but everything is ok now .It is still problematic , some problems are still there .There were no problems and no leaks .