Many shtiebls are set up as shuls that are part of someone's home.
This raises the question as to what is considered a "mourner's home" with regard to saying tachanun.
Background: Tachanun is not recited if people are praying in a mourner's home. However, if a mourner attends a synagogue outside his home, tachanun is recited. In short, the cancellation of tachanun is dependent on the place, itself (mourner's home), not the person (the mourner being present.)
So, my question is, if the shul is part of the mourner's home and people pray there, while the mourner is there, as well, does it have the status of a shul, as any other, or the status of a mourner's home?
Does it matter if the mourner dedicates that room specifically as a shul only or if it is a "multi-purpose" room? I.e., it is used as a shul for daily minyanim; it has an Aron Kodesh, ner tamid, etc. but during the year, the residents also eat their meals in the shul.