Passivhaus Trust
@passivhaustrust.bsky.social
Leading the way for adoption of the #Passivhaus standard in the UK. UK affiliate of the International Passive House Association.
www.passivhaustrust.org.uk
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www.passivhaustrust.org.uk
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As we say goodbye to 🧣chilly November, the #Passivhaus momentum is unmistakable! Read our #PassivhausPost & see how the Passivhaus community continues to scale up, innovate & inspire!
📩Read more, re-share & #subscribe to stay in the loop with all things #PassiveHouse! 👉https://bit.ly/PHTpost2025_11
📩Read more, re-share & #subscribe to stay in the loop with all things #PassiveHouse! 👉https://bit.ly/PHTpost2025_11
November 27, 2025 at 10:00 AM
As we say goodbye to 🧣chilly November, the #Passivhaus momentum is unmistakable! Read our #PassivhausPost & see how the Passivhaus community continues to scale up, innovate & inspire!
📩Read more, re-share & #subscribe to stay in the loop with all things #PassiveHouse! 👉https://bit.ly/PHTpost2025_11
📩Read more, re-share & #subscribe to stay in the loop with all things #PassiveHouse! 👉https://bit.ly/PHTpost2025_11
Social housing provider? Interested in Passivhaus?
Don't miss this brilliant opportunity to visit a near-completed large scale project next week in London!
🗺️ Newham, London
🗓️Tuesday 25 November 10.00-12.00
BOOK NOW: https://www.passivhaustrust.org.uk/event_detail.php?eId=1497
Please share!
Don't miss this brilliant opportunity to visit a near-completed large scale project next week in London!
🗺️ Newham, London
🗓️Tuesday 25 November 10.00-12.00
BOOK NOW: https://www.passivhaustrust.org.uk/event_detail.php?eId=1497
Please share!
November 21, 2025 at 7:00 AM
Social housing provider? Interested in Passivhaus?
Don't miss this brilliant opportunity to visit a near-completed large scale project next week in London!
🗺️ Newham, London
🗓️Tuesday 25 November 10.00-12.00
BOOK NOW: https://www.passivhaustrust.org.uk/event_detail.php?eId=1497
Please share!
Don't miss this brilliant opportunity to visit a near-completed large scale project next week in London!
🗺️ Newham, London
🗓️Tuesday 25 November 10.00-12.00
BOOK NOW: https://www.passivhaustrust.org.uk/event_detail.php?eId=1497
Please share!
📣On TOMORROW! The #FREE to attend NSBRC Passivhaus Workshop! Whether you’re a new build #selfbuilder or looking to #retrofit for more #sustainableliving, this event is packed with everything you need to kickstart your #PassiveHouse journey.
#Booknow 👉 https://ow.ly/ew9550XtyhE
#Booknow 👉 https://ow.ly/ew9550XtyhE
November 20, 2025 at 10:00 AM
📣On TOMORROW! The #FREE to attend NSBRC Passivhaus Workshop! Whether you’re a new build #selfbuilder or looking to #retrofit for more #sustainableliving, this event is packed with everything you need to kickstart your #PassiveHouse journey.
#Booknow 👉 https://ow.ly/ew9550XtyhE
#Booknow 👉 https://ow.ly/ew9550XtyhE
🎶Consultation 'respond-along'*!
Still time to respond to Welsh Building Regulations (Part L) Consultation!
Option 2 incs air permeability of 1.5 m³/hr.m² & ventilation with MVHR.
🚨Deadline: Monday 17 November
Template answers: www.passivhaustrust....
@aecb.bsky.social
Still time to respond to Welsh Building Regulations (Part L) Consultation!
Option 2 incs air permeability of 1.5 m³/hr.m² & ventilation with MVHR.
🚨Deadline: Monday 17 November
Template answers: www.passivhaustrust....
@aecb.bsky.social
November 14, 2025 at 11:49 AM
🎶Consultation 'respond-along'*!
Still time to respond to Welsh Building Regulations (Part L) Consultation!
Option 2 incs air permeability of 1.5 m³/hr.m² & ventilation with MVHR.
🚨Deadline: Monday 17 November
Template answers: www.passivhaustrust....
@aecb.bsky.social
Still time to respond to Welsh Building Regulations (Part L) Consultation!
Option 2 incs air permeability of 1.5 m³/hr.m² & ventilation with MVHR.
🚨Deadline: Monday 17 November
Template answers: www.passivhaustrust....
@aecb.bsky.social
🐲Encourage Wales to adopt elements of the Passivhaus methodology!
Join the AECB & Passivhaus Trust on Wednesday 12 November for a free webinar to respond to Welsh Future Homes consultation:
www.passivhaustrust.org.uk/event_detail...
@aecb.bsky.social @sarahlewis.bsky.social
Join the AECB & Passivhaus Trust on Wednesday 12 November for a free webinar to respond to Welsh Future Homes consultation:
www.passivhaustrust.org.uk/event_detail...
@aecb.bsky.social @sarahlewis.bsky.social
November 4, 2025 at 1:11 PM
🐲Encourage Wales to adopt elements of the Passivhaus methodology!
Join the AECB & Passivhaus Trust on Wednesday 12 November for a free webinar to respond to Welsh Future Homes consultation:
www.passivhaustrust.org.uk/event_detail...
@aecb.bsky.social @sarahlewis.bsky.social
Join the AECB & Passivhaus Trust on Wednesday 12 November for a free webinar to respond to Welsh Future Homes consultation:
www.passivhaustrust.org.uk/event_detail...
@aecb.bsky.social @sarahlewis.bsky.social
🚨Arresting Passivhaus Police Station becomes UK first
Wilmslow Police Station is the 1st in UK to achieve Passivhaus certification, setting a bold precedent for high-performance civic buildings.
https://passivhaustrust.org.uk/news/detail/?nId=1500
International Passive House Association (iPHA)
Wilmslow Police Station is the 1st in UK to achieve Passivhaus certification, setting a bold precedent for high-performance civic buildings.
https://passivhaustrust.org.uk/news/detail/?nId=1500
International Passive House Association (iPHA)
November 3, 2025 at 12:39 PM
🚨Arresting Passivhaus Police Station becomes UK first
Wilmslow Police Station is the 1st in UK to achieve Passivhaus certification, setting a bold precedent for high-performance civic buildings.
https://passivhaustrust.org.uk/news/detail/?nId=1500
International Passive House Association (iPHA)
Wilmslow Police Station is the 1st in UK to achieve Passivhaus certification, setting a bold precedent for high-performance civic buildings.
https://passivhaustrust.org.uk/news/detail/?nId=1500
International Passive House Association (iPHA)
🙌 A very warm welcome to the following new company members of the Passivhaus Trust:
➕ Trewin Design Architects
➕ William Lobban
➕ Natasha Houchin
➕ Bailey Partnership
➕ Brick & Urban Architecture
➕ Passive House Systems UK
➕ Passivhaus Project Management
➕ FARO Architecture
➕ MATT architecture
➕ Trewin Design Architects
➕ William Lobban
➕ Natasha Houchin
➕ Bailey Partnership
➕ Brick & Urban Architecture
➕ Passive House Systems UK
➕ Passivhaus Project Management
➕ FARO Architecture
➕ MATT architecture
November 3, 2025 at 12:37 PM
🙌 A very warm welcome to the following new company members of the Passivhaus Trust:
➕ Trewin Design Architects
➕ William Lobban
➕ Natasha Houchin
➕ Bailey Partnership
➕ Brick & Urban Architecture
➕ Passive House Systems UK
➕ Passivhaus Project Management
➕ FARO Architecture
➕ MATT architecture
➕ Trewin Design Architects
➕ William Lobban
➕ Natasha Houchin
➕ Bailey Partnership
➕ Brick & Urban Architecture
➕ Passive House Systems UK
➕ Passivhaus Project Management
➕ FARO Architecture
➕ MATT architecture
👻 Explore our spooktacular October #PassivhausPost and discover how #Passivhaus is tackling the climate challenge head-on.
📩 Read more, re-share & #subscribe to stay up to date
👉https://bit.ly/PHTpost2025_10
(Image 3©️ Cheshire Constabulary, image 5©️ Architype )
📩 Read more, re-share & #subscribe to stay up to date
👉https://bit.ly/PHTpost2025_10
(Image 3©️ Cheshire Constabulary, image 5©️ Architype )
October 30, 2025 at 10:01 AM
👻 Explore our spooktacular October #PassivhausPost and discover how #Passivhaus is tackling the climate challenge head-on.
📩 Read more, re-share & #subscribe to stay up to date
👉https://bit.ly/PHTpost2025_10
(Image 3©️ Cheshire Constabulary, image 5©️ Architype )
📩 Read more, re-share & #subscribe to stay up to date
👉https://bit.ly/PHTpost2025_10
(Image 3©️ Cheshire Constabulary, image 5©️ Architype )
Turning #Passivhaus ambition into reality is no small feat. #Joinus on 11th November for our next Passivhaus Client Club
💬 Hear our experts discuss real-world experiences
🔎 Discover new research models
👩🏫 Learn how to develop a strong Passivhaus business case
Book now 👉 https://ow.ly/h2Zm50XiK9A
💬 Hear our experts discuss real-world experiences
🔎 Discover new research models
👩🏫 Learn how to develop a strong Passivhaus business case
Book now 👉 https://ow.ly/h2Zm50XiK9A
October 29, 2025 at 2:03 PM
Turning #Passivhaus ambition into reality is no small feat. #Joinus on 11th November for our next Passivhaus Client Club
💬 Hear our experts discuss real-world experiences
🔎 Discover new research models
👩🏫 Learn how to develop a strong Passivhaus business case
Book now 👉 https://ow.ly/h2Zm50XiK9A
💬 Hear our experts discuss real-world experiences
🔎 Discover new research models
👩🏫 Learn how to develop a strong Passivhaus business case
Book now 👉 https://ow.ly/h2Zm50XiK9A
New #HealthyHomes Standard endorses #Passivhaus as a well-established design & quality assurance system - reducing energy demand, improving comfort, and safeguarding occupant health. This aligns national housing ambitions with proven, evidence-based approaches 🔗 GOV.UK
October 24, 2025 at 8:01 AM
New #HealthyHomes Standard endorses #Passivhaus as a well-established design & quality assurance system - reducing energy demand, improving comfort, and safeguarding occupant health. This aligns national housing ambitions with proven, evidence-based approaches 🔗 GOV.UK
🙌 Passivhaus puts people first!
Passivhaus Trust Chair Emma Osmundsen is speaking at this upcoming Government Business webinar about delivering affordable healthy Passivhaus homes
🗓️11/11/25 10.30am
✅ FREE FOR PUBLIC SECTOR
passivhaustrust.org....
Passivhaus Trust Chair Emma Osmundsen is speaking at this upcoming Government Business webinar about delivering affordable healthy Passivhaus homes
🗓️11/11/25 10.30am
✅ FREE FOR PUBLIC SECTOR
passivhaustrust.org....
October 23, 2025 at 3:42 PM
🙌 Passivhaus puts people first!
Passivhaus Trust Chair Emma Osmundsen is speaking at this upcoming Government Business webinar about delivering affordable healthy Passivhaus homes
🗓️11/11/25 10.30am
✅ FREE FOR PUBLIC SECTOR
passivhaustrust.org....
Passivhaus Trust Chair Emma Osmundsen is speaking at this upcoming Government Business webinar about delivering affordable healthy Passivhaus homes
🗓️11/11/25 10.30am
✅ FREE FOR PUBLIC SECTOR
passivhaustrust.org....
Great interview with Caroline Ashe Brady from Passive House Association of Ireland for That's TV Belfast News during the UK & Ireland Passivhaus Conference in Belfast.
https://x.com/ThatsTVBelfast/status/1979246072573661343
Dr. Barry Mc Carron International Passive House Association (iPHA)
https://x.com/ThatsTVBelfast/status/1979246072573661343
Dr. Barry Mc Carron International Passive House Association (iPHA)
October 20, 2025 at 11:29 AM
Great interview with Caroline Ashe Brady from Passive House Association of Ireland for That's TV Belfast News during the UK & Ireland Passivhaus Conference in Belfast.
https://x.com/ThatsTVBelfast/status/1979246072573661343
Dr. Barry Mc Carron International Passive House Association (iPHA)
https://x.com/ThatsTVBelfast/status/1979246072573661343
Dr. Barry Mc Carron International Passive House Association (iPHA)
Great to see the interview with the Passivhaus Trust's Jon Bootland on That's TV Belfast news about the UK & Ireland Passivhaus Conference 2025.
https://x.com/ThatsTVBelfast/status/1979246070027714608
International Passive House Association (iPHA)
Passive House Association of Ireland
https://x.com/ThatsTVBelfast/status/1979246070027714608
International Passive House Association (iPHA)
Passive House Association of Ireland
October 20, 2025 at 11:21 AM
Great to see the interview with the Passivhaus Trust's Jon Bootland on That's TV Belfast news about the UK & Ireland Passivhaus Conference 2025.
https://x.com/ThatsTVBelfast/status/1979246070027714608
International Passive House Association (iPHA)
Passive House Association of Ireland
https://x.com/ThatsTVBelfast/status/1979246070027714608
International Passive House Association (iPHA)
Passive House Association of Ireland
Do you live in, design, or build #Passivhaus projects? 🏡 Open your doors & inspire others during the #PHOpenDays 2025!
Whether it’s a #home, #construction site, or #commercial space, we’re calling on UK hosts to share their #PassiveHouse experience 👉 https://bit.ly/PHopendays2025
Whether it’s a #home, #construction site, or #commercial space, we’re calling on UK hosts to share their #PassiveHouse experience 👉 https://bit.ly/PHopendays2025
October 15, 2025 at 6:20 AM
Do you live in, design, or build #Passivhaus projects? 🏡 Open your doors & inspire others during the #PHOpenDays 2025!
Whether it’s a #home, #construction site, or #commercial space, we’re calling on UK hosts to share their #PassiveHouse experience 👉 https://bit.ly/PHopendays2025
Whether it’s a #home, #construction site, or #commercial space, we’re calling on UK hosts to share their #PassiveHouse experience 👉 https://bit.ly/PHopendays2025
🔦Dundashill Platform 3, Glasgow
Scotland's largest Passivhaus residential development to date!
Read technical details & lessons learned: www.passivhaustrust....
@collectivearch.bsky.social
@warmlowenergy.bsky.social
@scotecodesign.bsky.social
@scottishhousingnews.com
@sfha.bsky.social
Scotland's largest Passivhaus residential development to date!
Read technical details & lessons learned: www.passivhaustrust....
@collectivearch.bsky.social
@warmlowenergy.bsky.social
@scotecodesign.bsky.social
@scottishhousingnews.com
@sfha.bsky.social
October 10, 2025 at 11:00 AM
🔦Dundashill Platform 3, Glasgow
Scotland's largest Passivhaus residential development to date!
Read technical details & lessons learned: www.passivhaustrust....
@collectivearch.bsky.social
@warmlowenergy.bsky.social
@scotecodesign.bsky.social
@scottishhousingnews.com
@sfha.bsky.social
Scotland's largest Passivhaus residential development to date!
Read technical details & lessons learned: www.passivhaustrust....
@collectivearch.bsky.social
@warmlowenergy.bsky.social
@scotecodesign.bsky.social
@scottishhousingnews.com
@sfha.bsky.social
Tune into That's TV Belfast TONIGHT at 6pm on Freeview Channel 7 to see more Passivhaus positivity from the UK & Ireland Passivhaus Conference!
With Jon Bootland from UK PHT & Caroline Ashe Brady from Ireland PHAI, filmed during yesterday's Belfast Conference.
www.thats.tv/belfast/
With Jon Bootland from UK PHT & Caroline Ashe Brady from Ireland PHAI, filmed during yesterday's Belfast Conference.
www.thats.tv/belfast/
October 9, 2025 at 1:37 PM
Tune into That's TV Belfast TONIGHT at 6pm on Freeview Channel 7 to see more Passivhaus positivity from the UK & Ireland Passivhaus Conference!
With Jon Bootland from UK PHT & Caroline Ashe Brady from Ireland PHAI, filmed during yesterday's Belfast Conference.
www.thats.tv/belfast/
With Jon Bootland from UK PHT & Caroline Ashe Brady from Ireland PHAI, filmed during yesterday's Belfast Conference.
www.thats.tv/belfast/
🏗️ Passivhaus upscaling in the UK & Ireland
The Belfast Passivhaus Conference 2025 celebrated the rapid growth of Passivhaus in Northern Ireland, & across the UK and Ireland. Minister @andrewmuirni.bsky.social from @daera-ni.gov.uk was a keynote speaker.
www.passivhaustrust.org.uk/news/detail/...
The Belfast Passivhaus Conference 2025 celebrated the rapid growth of Passivhaus in Northern Ireland, & across the UK and Ireland. Minister @andrewmuirni.bsky.social from @daera-ni.gov.uk was a keynote speaker.
www.passivhaustrust.org.uk/news/detail/...
October 9, 2025 at 12:29 PM
🏗️ Passivhaus upscaling in the UK & Ireland
The Belfast Passivhaus Conference 2025 celebrated the rapid growth of Passivhaus in Northern Ireland, & across the UK and Ireland. Minister @andrewmuirni.bsky.social from @daera-ni.gov.uk was a keynote speaker.
www.passivhaustrust.org.uk/news/detail/...
The Belfast Passivhaus Conference 2025 celebrated the rapid growth of Passivhaus in Northern Ireland, & across the UK and Ireland. Minister @andrewmuirni.bsky.social from @daera-ni.gov.uk was a keynote speaker.
www.passivhaustrust.org.uk/news/detail/...
"Weavers’ Hall reflects Queen’s University’s commitment to achieving Net Zero by 2040 and our ambition to deliver low emission buildings through Passivhaus certification.
October 6, 2025 at 6:00 AM
"Weavers’ Hall reflects Queen’s University’s commitment to achieving Net Zero by 2040 and our ambition to deliver low emission buildings through Passivhaus certification.
"Passivhaus .. offers huge opportunities..in terms of tackling fuel poverty and achieving climate goals."
Andrew Haley, Chair, N.I. Ministerial Advisory Group, Architecture & Built Environment
Join us on 7-8 Oct at UK & Ireland Passivhaus Conference in Belfast & online: https://ukphc.org.uk/
Andrew Haley, Chair, N.I. Ministerial Advisory Group, Architecture & Built Environment
Join us on 7-8 Oct at UK & Ireland Passivhaus Conference in Belfast & online: https://ukphc.org.uk/
October 3, 2025 at 6:00 AM
"Passivhaus .. offers huge opportunities..in terms of tackling fuel poverty and achieving climate goals."
Andrew Haley, Chair, N.I. Ministerial Advisory Group, Architecture & Built Environment
Join us on 7-8 Oct at UK & Ireland Passivhaus Conference in Belfast & online: https://ukphc.org.uk/
Andrew Haley, Chair, N.I. Ministerial Advisory Group, Architecture & Built Environment
Join us on 7-8 Oct at UK & Ireland Passivhaus Conference in Belfast & online: https://ukphc.org.uk/
🤩WOW!
✅2 campuses
✅6 buildings
✅30,000m2 Treated Floor Area
✅Targeting Passivhaus Premium
Passivhaus Premium 'Campuses of the future' - coming to Northern Ireland!
www.passivhaustrust....
Find out more at the Passivhaus Conference 7-8 October, in Belfast & online: https://ukphc.org.uk/
✅2 campuses
✅6 buildings
✅30,000m2 Treated Floor Area
✅Targeting Passivhaus Premium
Passivhaus Premium 'Campuses of the future' - coming to Northern Ireland!
www.passivhaustrust....
Find out more at the Passivhaus Conference 7-8 October, in Belfast & online: https://ukphc.org.uk/
September 26, 2025 at 11:00 AM
🤩WOW!
✅2 campuses
✅6 buildings
✅30,000m2 Treated Floor Area
✅Targeting Passivhaus Premium
Passivhaus Premium 'Campuses of the future' - coming to Northern Ireland!
www.passivhaustrust....
Find out more at the Passivhaus Conference 7-8 October, in Belfast & online: https://ukphc.org.uk/
✅2 campuses
✅6 buildings
✅30,000m2 Treated Floor Area
✅Targeting Passivhaus Premium
Passivhaus Premium 'Campuses of the future' - coming to Northern Ireland!
www.passivhaustrust....
Find out more at the Passivhaus Conference 7-8 October, in Belfast & online: https://ukphc.org.uk/
"I am delighted that Belfast is hosting the joint UK & Ireland Passivhaus Conference, spotlighting the impressive Passivhaus innovation & upscaling taking place in Northern Ireland, & across the UK and Ireland"
@andrewmuirni.bsky.social
Join us in Belfast & online:
https://ukphc.org.uk/
@andrewmuirni.bsky.social
Join us in Belfast & online:
https://ukphc.org.uk/
September 24, 2025 at 2:00 PM
"I am delighted that Belfast is hosting the joint UK & Ireland Passivhaus Conference, spotlighting the impressive Passivhaus innovation & upscaling taking place in Northern Ireland, & across the UK and Ireland"
@andrewmuirni.bsky.social
Join us in Belfast & online:
https://ukphc.org.uk/
@andrewmuirni.bsky.social
Join us in Belfast & online:
https://ukphc.org.uk/
🙌Shout-out to Northern Ireland housebuilders Fraser Millar for embracing the Passivhaus methodology at scale!
www.passivhaustrust....
Hear more about the 219-home development targeting the Passive House Institute Low Energy Building standard at the Passivhaus Conference: https://ukphc.org.uk/
www.passivhaustrust....
Hear more about the 219-home development targeting the Passive House Institute Low Energy Building standard at the Passivhaus Conference: https://ukphc.org.uk/
September 24, 2025 at 6:00 AM
🙌Shout-out to Northern Ireland housebuilders Fraser Millar for embracing the Passivhaus methodology at scale!
www.passivhaustrust....
Hear more about the 219-home development targeting the Passive House Institute Low Energy Building standard at the Passivhaus Conference: https://ukphc.org.uk/
www.passivhaustrust....
Hear more about the 219-home development targeting the Passive House Institute Low Energy Building standard at the Passivhaus Conference: https://ukphc.org.uk/
💡Passivhaus lessons learnt!
Designing a Special Educational Needs and Disabilities (SEND) college with a hydrotherapy pool to the Passivhaus standard was not without its challenges!
Case study: www.passivhaustrust....
Find out more at the UK + IRL Passivhaus Conference: https://ukphc.org.uk/
Designing a Special Educational Needs and Disabilities (SEND) college with a hydrotherapy pool to the Passivhaus standard was not without its challenges!
Case study: www.passivhaustrust....
Find out more at the UK + IRL Passivhaus Conference: https://ukphc.org.uk/
September 23, 2025 at 11:00 AM
💡Passivhaus lessons learnt!
Designing a Special Educational Needs and Disabilities (SEND) college with a hydrotherapy pool to the Passivhaus standard was not without its challenges!
Case study: www.passivhaustrust....
Find out more at the UK + IRL Passivhaus Conference: https://ukphc.org.uk/
Designing a Special Educational Needs and Disabilities (SEND) college with a hydrotherapy pool to the Passivhaus standard was not without its challenges!
Case study: www.passivhaustrust....
Find out more at the UK + IRL Passivhaus Conference: https://ukphc.org.uk/
Northern Ireland Minister of Agriculture, Environment, and Rural Affairs Andrew Muir has joined the Passive House Association of Ireland and others to help launch and welcome the UK & Ireland Passivhaus Conference, which will run from 7-8 October at the ICC Belfast.
www.passivhaustrust....
www.passivhaustrust....
September 19, 2025 at 6:00 AM
Northern Ireland Minister of Agriculture, Environment, and Rural Affairs Andrew Muir has joined the Passive House Association of Ireland and others to help launch and welcome the UK & Ireland Passivhaus Conference, which will run from 7-8 October at the ICC Belfast.
www.passivhaustrust....
www.passivhaustrust....
💸Energy-bill-busting!
Initial monitoring data from Belfast's Sunningdale Gardens Passivhaus social housing project demonstrates how Passivhaus keeps space heating costs low.
Case study: www.passivhaustrust....
Hear more about the project at the Passivhaus Conference: https://ukphc.org.uk/
Initial monitoring data from Belfast's Sunningdale Gardens Passivhaus social housing project demonstrates how Passivhaus keeps space heating costs low.
Case study: www.passivhaustrust....
Hear more about the project at the Passivhaus Conference: https://ukphc.org.uk/
September 18, 2025 at 11:00 AM
💸Energy-bill-busting!
Initial monitoring data from Belfast's Sunningdale Gardens Passivhaus social housing project demonstrates how Passivhaus keeps space heating costs low.
Case study: www.passivhaustrust....
Hear more about the project at the Passivhaus Conference: https://ukphc.org.uk/
Initial monitoring data from Belfast's Sunningdale Gardens Passivhaus social housing project demonstrates how Passivhaus keeps space heating costs low.
Case study: www.passivhaustrust....
Hear more about the project at the Passivhaus Conference: https://ukphc.org.uk/