6.9 Attached Zones & Remaining Elements – Above Green

6.9.1 Attached Zones

Reduction Factors for Tempered Spaces

In passive house verification mode, the lowest reduction factor currently allowed for PHIUS+ Certification is >0.95. One example of this is a garage. Garages may be warmer in the winter and afford a reduction to the assemblies that come into contact with it. However, it also could be warmer in the summer. The exact reduction factor can’t be calculated in passive house verification mode and a conservative approach is being taken.

If there is an infill project built directly adjacent to existing buildings, the walls neighboring the existing building can be assumed adiabatic if the space is occupied and residential or if the space is non-residential and always conditioned. The neighboring walls should be set to 'Space with same inner conditions'. (This will result in a slightly higher heating load than setting up the neighboring building as an 'Attached Zone w/a temperature reduction factor of 0').

6.9.2 Remaining Elements

Any components with ‘Outer Air’ or ‘Ground’ assigned to both the ‘Inner side’ and ‘Outer side’ will appear as remaining elements. This may include shading elements that are outside of the thermal boundary, a roof over a vented attic, etc.

The remaining elements only influence the calculation via the dynamic shading calculation. No heat transfer is considered through these components.