Hello there.
I'm about to self-build my own house here in Australia and I think I'll include a cupola in the design.
So my question is, how effective (in your own experience) are they in reducing the heat in the roof during a long hot summer and how big should they be ( the sky's the limit)?
I'd welcome your experience and suggestions.
Thank you.
PROSoffit and ridge vents are still the gold standard for attic ventilation. If hou want a vented assembly. Unvented assemblies are fast becoming more used because they are more efficient. Cupolas are merely decorative on a modern built home.
Thank you Lomo and Mark.
I'll incorporate a cupola just to see if it works.
Mark: where would I find the necessary calculations to properly size the vents please.
Thanks again.
PROCupolas are great for ventilation of a barn. For a home, I would suggest designing a central light well/ventilation system to include windows with thermostatically-controlled motorized openers.
PROProperly designed cupolas can be great for admitting natural light into the center of a house where there are no windows.
For ventilation, a properly sized and designed attic fan, with louvers which open when the fan is in operation and close when not, can significantly help ventilate a house and reduce the need for air conditioning. Of course, the air pulled into the attic from the house must have a means to escape the attic to the outside. In other words, a ventilated attic! It's an old fashioned idea, but it still works!
PROI'm about to self-build my own house here in Australia
Have you checked here: https://www.houzz.com.au
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Mark Bischak, Architect