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News & Articles

More options in SEL window specs database

More window manufacturers and suppliers have supplied data to populate Sustainable Engineering’s window specifications database. Passive House designers can now find specs for timber windows manufactured here in New Zealand...

by Toby Brooke

Updated: Mar 2026

  • General Notes
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Generic slab edges default should be B’/2=2m

A slab edge is one of the most common thermal bridges we see in New Zealand. In a traditional timber framed building on a concrete slab, the perimeter thermal bridge...

by Toby Brooke

Updated: May 2021

  • Technical Notes
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Understanding DataTables and Variants

Tech Tips with Toby Variants is a handy tool when using PHPP to model multiple design options within the one PHPP file. Suppose you’re trying different window frames, glazing or...

by Toby Brooke

Updated: Sep 2020

  • Technical Notes
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Top 10 tricks for PHPP speed and ease

Tech Tips with Toby PHPP is the software Passive House designers use to model the performance of buildings—before they are built. It’s a front-end on an Excel spreadsheet. Now, most...

by Toby Brooke

Updated: Jun 2021

  • Certification Guidance
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