Called the PHPP, this is a detailed MS excel package with about 20 tabs whichs allows you / one to model up the energy performance using a bottom up approach by providing in the technical details for each building component e.g. local weather, window, glazing, shading , foundations, doors etc... its a very detailed package and has been proven by the PHI (Passive Haus Institute) over many years to be a great design tool. For someone who knows their way around it, there is 1-2 days of input work. It is relatively easy to use and even takes into account summer shading from trees, impact of local terrain etc...much of which simpler tools choose to ignore.
They key thing in using the PHPP or any such is that experience and good data inputs result in good and reliable data outputs. In our case we had the house modelled at the planning permission stage & tender stage , using standard Passive House design criteria ( air tightness, good quality windows, site shading& site aspect/building orientation) and some design assumptions to figure out (1) could the house be build to this standard and (2) to understand what the design & construction criteria for the actual build would be i.e. indicative U values for wall, floors, roof. Its definitely too late once the house is built or construction has started to come up with the criteria!
More over , this is the basic validation tool that the PHI require you to submit for certification when the building is complete.
SEAI Website - buying the PHPP:
http://www.phyxhost.ie/dev/reioshop/catalog/product_info.php?products_id=36&osCsid=aaec8343a9a9d04c455069143fc7df03
Wiki article on PassivHaus
http://en.wikipedia.org/wiki/Passivhaus
They key thing in using the PHPP or any such is that experience and good data inputs result in good and reliable data outputs. In our case we had the house modelled at the planning permission stage & tender stage , using standard Passive House design criteria ( air tightness, good quality windows, site shading& site aspect/building orientation) and some design assumptions to figure out (1) could the house be build to this standard and (2) to understand what the design & construction criteria for the actual build would be i.e. indicative U values for wall, floors, roof. Its definitely too late once the house is built or construction has started to come up with the criteria!
More over , this is the basic validation tool that the PHI require you to submit for certification when the building is complete.
SEAI Website - buying the PHPP:
http://www.phyxhost.ie/dev/reioshop/catalog/product_info.php?products_id=36&osCsid=aaec8343a9a9d04c455069143fc7df03
Wiki article on PassivHaus
http://en.wikipedia.org/wiki/Passivhaus
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