IN a house of mourning, without any living avelim, do you make the normal adjustments in Tefilah that we make in a House of Mourning?
Answer:
Tachanun is omitted in during tefilos in the house of mourning, even if there is no avel sitting shiva.
Sources:
see Mishna Brura 131:20, Shaarei Tshuva ibid. s”k 10, Gesher Hachaim Chapter 20.