Ceiling Voids - Model or Not

[richarda]

Morning

Don't know if this is a modelling or Part L question really.

We are constructing a building for Part L purposes and I know some people do model ceiling voids separately, but is there anything that specifically states that when doing a dynamic Part L model the ceiling void must form part of the room and not modelled separately.

Under the EPC Convention it does state that ceiling voids must be ignored but I would imagine this is for an SBEM Model and not a full DSM simulation.

Any ideas or clarification on the above would be most helpful.