Naturally Ventilated Unconditioned Atrium

[thowarth]

Does anyone know or have any good ideas the best way to model an unheated atrium that is naturally ventilated in summer to prevent overheating?

I can't figure out the best NCM category to match this strategy. The problem with setting the system type to 'none' is that it removes the option to provide natural ventilation (i.e. 6 ACH) to this space.

I am thinking the best way to get around this would be to use macroflow to modulate the window opening profiles based on error from set point. Would this method accurately reflect this strategy under the NCM methodology?

[JohnLloyd]

If you're modelling for overheating, you shouldn't be using the NCM templates; these are only used to demonstrate Part L compliance, create EPC's etc.

You should create your own templates with internal gains set to best represent how you expect the atrium to be used.

[thowarth]

I have modeled the atrium for overheating but am wondering which template to apply for the NCM calculations to test for Part L compliance.

[JohnLloyd]

Ah, in that case I'd suggest 'circulation'.