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Thread: nesting vs hosting

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    Member mona miller's Avatar
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    nesting vs hosting

    Can anyone explain me difference between nesting and hosting revit families?
    Thanks

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    Forum Addict elton williams's Avatar
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    Nesting is when one family is loaded into another (for whatever reason) maybe to build up a family from several unique parts. A door may consist of a frame, a panel (or leaf), and hardware (latch, handle, hinges), where each of those 'separate' families are 'nested' into a parent family so they can be loaded into the Revit project as a single family.
    Hosting refers to how the family is referenced to other geometry, ie face based, wall hosted, ceiling hosted, each of those types is placed according to the 'host' reference. Unhosted families are still usually placed in reference to a project level. For eg, your door handle my be hosted to the face of the door panel (leaf). The door panel inset/ offset may be hosted onto a reference plane inside your family. When loaded into a project your door will be 'hosted' by the wall but, in the case of shared nested families, the 'nested' door panel may be swapped out for a different 'nested' door panel family.
    Hope that makes sense?
    Dave Jones likes this.

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    Member mona miller's Avatar
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    Yes, thank you - that makes sense.

    "When loaded into a project your door will be 'hosted' by the wall but, in the case of shared nested families, the 'nested' door panel may be swapped out for a different 'nested' door panel family." - could you elaborate this sentence - I am not sure that I understand it clearly.

    Also, what kind of elements in Revit can host families? Could we host family to reference lines and planes?

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    The Moderator with No Imagination MPwuzhere's Avatar
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    Quote Originally Posted by mona miller View Post
    Also, what kind of elements in Revit can host families? Could we host family to reference lines and planes?
    Of course....along with ceiling, wall, floor, line, patterns, roof, or no host at all (mostly used with reference planes)

    A family needs to be hosted to something to be placed in the model (except the generic model of course)...

    Nesting is a totally different type of process though....Nesting is the placing of a family within another family. This could be anything from a door panel and frame hosted in a door family to an annotation symbol loaded into another annotation symbol. Most of the time this is done so you can cut down on tons of reference planes and formulas from one family to another and what is seen in the project.

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