The chimney of the wall-hung boiler faces the big room. Is there a courtyard in the middle to separate Feng Shui?

If the chimney is not very thin and high, there will be no obvious impact.

Moreover, only if the chimney is in the wrong position will it have a negative impact. For example, if the chimney is in the west of the master bedroom this year, it will definitely have a bad influence, but if the appearance is short, then the bad influence can be basically ignored.