> For the complete documentation index, see [llms.txt](https://wiki.greatcollaboration.uk/knowledgebase/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.greatcollaboration.uk/knowledgebase/buildings/housing-design/passif-haus-passive-house-standards.md).

# Passif Haus/Passive House Standards

From: **Chris Pointon** <<chris@camemergency.org>>\
Date: Fri, May 30, 2025 at 11:51 AM\
Subject: Re: Great Collaboration Banter session 71: Great Collaboration update\
To: Jenny Barna <<jcjbarna@gmail.com>>\
Cc: Graham Stoddart-Stones <<gcstones52@gmail.com>>, Andrew Maliphant <<andrew.maliphant@greatcollaboration.uk>>, Graham Stoddart-Stones <<admin@placebasedinitiative.co.uk>>, Joolz Thompson <<joolz@communityclimateaction.uk>>\
\
\
As far as I can Google, "Passive House" and "PassivHaus" mean the same thing:

<https://ukalternativeenergy.co.uk/passive-house-or-passivhaus/><br>

There are other low energy standards such as EnerPhit and PHI Low Energy Building (LEB):

<https://passipedia.org/_media/picopen/9f_160815_phi_building_criteria_en.pdf><br>

These are not Passive House standard, but are still a high standard of energy efficiency. Last year, following a pilot, Cambridge City Council opted for their own "[Cam Standard](https://democracy.cambridge.gov.uk/documents/s66917/Agenda+item+10+-+Appendix+4+B+-+Sustainable+Housing+Design+Guide.pdf)" for council-owned properties that is slightly lower than Passive House but higher than LEB. They found that fulfilling some Passive House requirements was disproportionately costly for the benefit.<br>

That Passipedia site - <https://passipedia.org/> - is probably the best jumping off point for people who really want to dig into Passive Houses.


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