Thermal optimisation of building products
The Passive House Institute provides consultancy on the thermal optimisation of building products from the very beginning of the process through to pontetial Passive House Component Certification.
In addition to other tools, we make use of two and three dimensional as well as dynamic thermal flow analyses.
Example 1: Insulated window frame
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| Frame profile | Timber exterior insulation finishing system (EIFS) | insulated PVC profile |
| Frame U-Value Uf [W/(m²K)] | 0.62 | 0.69 |
| Elevation width [mm] | 131 | 120 |
| Edge bond ψg [W/(mK)] | 0.031 | 0.029 |
| Glas rebate d [mm] | 26 | 30 |
| Glazing (44 mm) Ug [W/(m²K)] | 0.70 | 0.70 |
Example 2: External wall connection to unheated cellar ceiling
U-Value (External wall) = 0.12 W/(m²K) Thermal bridge coefficient: |
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