Is Passivhaus Still Relevant?
With heat pumps and a decarbonising grid, is Passivhaus worth the extra effort?
A post I was asked to write for the @coaction.bsky.social Blog. This relates to new-build, retrofit is a different discussion.. coaction.org.uk/blog/2026/Pa...
22.01.2026 06:17 — 👍 4 🔁 3 💬 0 📌 1
New Passivhaus Designer course will be taught from September by Coaction Training CIC
🎓 #Passivhaus Designer Exam – New Format from September!
Thinking about becoming a Certified Passivhaus Designer? From September 2025, the exam will look a little different.
Our latest blog explains:
✅ The new format
✅ Preparation
✅ Key topics
Why not join in?
coaction.org.uk/blog/2025/Pa...
15.08.2025 08:49 — 👍 3 🔁 1 💬 0 📌 0
🔦 Passivhaus Jedi skills beat Zombies! 🧟♀️
"These are lots of misconceptions that have arisen, but like a bad zombie movie, refuse to die & keep coming back, no matter how much we patiently explain them away."
Greengauge's Toby Cambray shares Passivhaus mythbusting:
coaction.org.uk/blog...
08.08.2025 06:00 — 👍 6 🔁 4 💬 1 📌 0
Our Members and Partners present hands-on training courses in August. asbp.org.uk/partner-member-events
18/08 to 22/08 Todmorden, West Yorkshire. School of Natural Building 5-day practical course on clay plastering onto straw-bale walls, led by Miki.
21/08 Blantyre, Scotland. BE-ST Passvihaus Practical Training with training provider Coaction Training CIC
28/08 & 29/08 Nr Brecon, Wales. Ty-Mawr 2-day course on lime in buildings
Hands-on training courses in August. asbp.org.uk/partner-member-events:
@schoolofnatbuild.bsky.social 5-day practical course on clay plastering onto #strawbale walls.
BE-ST @be-stbuild.bsky.social #Passvihaus Practical Training by @coaction.bsky.social.
Ty-Mawr 2-day course on lime in buildings.
05.08.2025 06:55 — 👍 4 🔁 1 💬 0 📌 0
‼️ Buildings that Perform.
Surely that’s a given!
Only if you know what performance is - comfortable, healthy, low carbon, low or no energy buildings - and then how to design, deliver and quality assure them.
Is #passivhaus the answer?
👀 We offer training…
www.youtube.com/@CoactionTra...
25.07.2025 18:21 — 👍 4 🔁 3 💬 0 📌 0
50% Welsh Government Skills Grant – Notes from a Beneficiary.
A straightforward grant that provided Wales-based business Spring Design the opportunity to consider a holistic training programme for our staff.
‼️ Based in Wales? - the Welsh Government has a 50% grant for upskilling business staff.
👏 Net Zero Skills training funding for the Construction and Retrofitting of Residential Buildings.
🌟#passivhaus - Designer / Tradesperson / Retrofit / THERM are all covered.
coaction.org.uk/blog/2025/We...
15.07.2025 15:46 — 👍 2 🔁 0 💬 0 📌 1
🔴 Live Q&A – Passivhaus Retrofit Delivery
📅 Tues 1 July | ⏰ 1–1:45pm | 💻 Free
Join trainers Will South & Kirsty Maguire to learn how this advanced course helps contractors + designers deliver deep retrofit to Passivhaus/EnerPHit standards.
🔗 Info + sign up: coaction.org.uk/blog
See you there!
25.06.2025 10:00 — 👍 3 🔁 2 💬 0 📌 0
Installing intello plus air tightness membrane into a mock up of a roof/ceiling of a timber house
Taping details of connoting the air tightness membrane to the timber joists
Wind membrane installed between rafters to prevent wind washing thermal bypass, followed by Rockwool insulation
How you may insulate between I joists, using layers of insulation with staggered joints to prevent any gaps from front to back
Yesterday I spent the day with @be-stbuild.bsky.social & @coaction.bsky.social putting Passive House theory into practice. In the morning sequencing insulation and membranes into a retrofit rig. So helpful even as a homeowner and not being in the trade.
19.06.2025 22:01 — 👍 4 🔁 2 💬 2 📌 0
Sean - Great to hear - thank you for sharing!
25.06.2025 09:57 — 👍 1 🔁 0 💬 0 📌 0
📣 ON THIS WEEK - Don’t miss the final webinar in our 2025 Large & Complex #Passivhaus Masterclass series!
🎓 A unique opportunity to learn the challenges & strategies for achieving #EnerPHit #retrofit in a dense, urban environment
📅 Wed 18 Jun
📍Online
⏰13:00 - 14:30
👉passivhaustrust.org....
16.06.2025 08:07 — 👍 6 🔁 2 💬 0 📌 0
🎓 Architecture students & lecturers — last chance!
Bookings for our Certified Passivhaus Designer – Summer Edition close tomorrow at midnight.
Online course | Starts June | Discounted pricing
🔗 STUDENTS coaction.org.uk/courses/stud...
🔗LECTURERS: coaction.org.uk/courses/lect...
#Passivhaus
30.05.2025 13:53 — 👍 4 🔁 4 💬 0 📌 1
📣 Have you booked your place?
💡 AECB CarbonLite Understanding Building Physics
📆 Starts Monday 2 June 2025
🕙 10am-12pm OR 2:30pm-4:30pm
🟢 Live, online, interactive teaching, with lots of opportunity to be curious with Gloria Lo
Find out more: buff.ly/e4SWx8f
14.04.2025 09:01 — 👍 4 🔁 3 💬 0 📌 0
YouTube video by Coaction Training CIC
Passivhaus Designer Course - Lecturer Edition - LIVE Q&A Session - May 2025
‼️ UK built environment Lectures wanting to up-skill in #Passivhaus
Did you miss our short Q&A session on Thursday.
👀 Catch up here www.youtube.com/watch?v=KkX_...
📆 We start on 9 June.
23.05.2025 13:53 — 👍 4 🔁 1 💬 0 📌 1
⬇️ Today at 1.15pm, bring your questions.
‼️ if you can’t make it, sign up and we will send the recording.
20.05.2025 09:39 — 👍 2 🔁 1 💬 0 📌 0
📅 Change of date!
Join us today 16 May at 1pm for our trainers case-study 12/13
🙏 Speaker: Ann-Marie Fallon
🏫 Project: Harris Academy, London - #Certified #Passivhaus New Build
🌟 Audience: Coaction Alumni
🌟 UK’s first Passivhaus secondary #school and the largest Passivhaus school in the UK.
16.05.2025 09:47 — 👍 7 🔁 2 💬 0 📌 1
‼️ CEPH Passivhaus Designer Training
👏 Student and Lecturer specially discounted - full course
❓ Want to know more? Join us for 1 of our 2 Q&A sessions with @sallygodber.bsky.social
📅 Students - 1.15 to 1.45 BST Tues 20
📅 Lecturers - 12.00 to 12.30 BST Thurs 22
coaction.org.uk/blog/2025/St...
16.05.2025 09:43 — 👍 4 🔁 2 💬 0 📌 3
🏗️ UK #BuiltEnvironment students—want to boost your skills with an internationally recognised sustainable building certification?
We’re offering a discounted Passivhaus Designer course just for you! Starts June 9. Flexible online format. Spaces limited!
🔗 coaction.org.uk/courses/stud...
09.05.2025 10:58 — 👍 4 🔁 1 💬 0 📌 1
📆 Session 11/13 - Thurs 8 May 1pm
🌟 Speaker: Ann-Marie Fallon
🏫 Project: Riverside School, Perth Scotland - #Certified Passivhaus New Build primary #school.
With a brick façade and steel frame, the interior materials were carefully chosen for:
performance
minimal toxicity
high-quality
wellbeing.
07.05.2025 10:43 — 👍 6 🔁 4 💬 0 📌 1
The Seed, Dundee is the focus of this week’s webinar for Coaction Training CiC’s alumni webinar.
📆 Thursday at 1pm Coaction Alumni
✅ Kirsty Maguire
🌟 The Seed #certified #passivhaus #home for 2 families.
🏡 Keen to avoid concrete, the home is #timber-rich, structure, insulation & cladding, with steel screw pile foundations.
🌍 Designed to be #deconstructed at end of life & elements reused.
22.04.2025 17:18 — 👍 8 🔁 1 💬 0 📌 0
Next Alumni Webinar – Thursday 17th April!
Join Will South as he shares lessons from the SAP3 student accommodation project at UWE Bristol—the UK’s largest certified Passivhaus development!
📅 Thursday 17th April | 13:05–13:55
🌟 Earn 1 PHI credit point for attending live!
📩 Message us for details!
14.04.2025 16:11 — 👍 8 🔁 3 💬 0 📌 1
Thinking about training as a Certified Passivhaus Designer?
Learn from our team of 21 experts & build real-world skills in low-energy design.
What graduates say:
“Changed how I approach sustainable design.”
“Excellent trainers.”
🌟Funding available.🌟
🔗More info: coaction.org.uk/courses/desi...
09.04.2025 15:37 — 👍 6 🔁 3 💬 0 📌 1
@passivhaustrust.bsky.social @sarahlewis.bsky.social
01.04.2025 09:43 — 👍 3 🔁 0 💬 0 📌 0
🔔 Next Alumni Webinar – This Thursday! 🔔
Join Sarah Lewis, PHT Research & Policy Director, as she shares how she’s transforming her 1950s home in Scotland towards EnerPHit, cutting heating demand by 90% while improving comfort & air quality.
📅 3rd April – Msg for details! 📩
#EnerPHit #Passivhaus
01.04.2025 09:30 — 👍 6 🔁 3 💬 1 📌 2
🔔 EnerPHit Part 2 – This Thursday! 🔔
Alan Clarke returns for Part 2 of our Carlton Chapel House retrofit deep dive—focusing on services. Don't miss the chance to learn from this pioneering project!
📅 27th March – Message us for details! 📩
#Passivhaus #EnerPHit #retrofit
24.03.2025 14:22 — 👍 7 🔁 2 💬 1 📌 0
🔧 Coaction Alumni—Don’t Miss This EnerPHit Double Bill! 🔧
@alanclarke.bsky.social shares insights from the Carlton Chapel House retrofit—a bold upgrade of a 1980s social housing block.
📅 20th March – Part 1: Building Fabric
📅 27th March – Part 2: Services
📩 Message us for details!
#Passivhaus
19.03.2025 13:14 — 👍 6 🔁 4 💬 0 📌 1
And a huge thanks to our amazing trainers: @sallygodber.bsky.social @ecominimalnick.bsky.social @marksiddall.bsky.social @billbutch.bsky.social, Will South @alanclarke.bsky.social, Caroline Martin, Liam McDonagh-Greaves, Eric Parks, Mike Roe! 🙌
18.03.2025 15:56 — 👍 3 🔁 0 💬 0 📌 0
🎉 Huge congratulations to our first Certified Passivhaus Designer cohort of 2025—100% pass rate on their exam! 🔥👏
Welcome to the Passivhaus community! Can’t wait to see where your journey takes you. 🌍
18.03.2025 15:55 — 👍 10 🔁 4 💬 1 📌 1
The free professional platform for the built environment.
Based in the UK.
Director, PH Certifier. Arsenal season ticket holder. Muay Thai enthusiast. Stormtrooper.
Architecture | Sustainability | Politics | Passivhaus | Cycling | Cities | EU
Humanist. Physicist. Educator. Engineer.
Energy efficiency is key to solving the climate crisis – and the problems associated with it. Energy efficiency is NOT an abstract concept: it is real in the form of passive houses, heat pumps, electric vehicles,...
Empowering Architects & Builders with insights from the #PassiveHouse community to design+build better buildings, faster - while not warming the planet.
Have you been putting off upgrading your home? We get it. Life’s busy, and it’s easy to let another year slip by. But cold draughts in winter, stuffy rooms in summer – and a home that isn’t kind to the planet – won’t fix themselves. But....
Author of Doughnut Economics, Co-founder of Doughnut Economics Action Lab, Senior Teaching Fellow at Oxford Uni Environmental Change Institute. doughnuteconomics.org
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Centre for Climate Adaptation & Environment Research, University of Bath. Our research ranges from enhanced understanding of climate change to developing mitigation and adaptation suitable for our natural and built environment.
The world's most influential architecture, design and interiors magazine.
www.dezeen.com
Deputy Director at Innovate UK for Heat & Buildings. Welsh. Chemist. Hypenotic. ChesterSciBar. Catalyst Science Discovery Centre. Passionate about the power of stories and innovation. Some whimsy. Opinions own.
Holistic home improvement support for households, trades and local gov on maintenance, heat pumps, insulation and healthy ventilation.
Community energy coop/ community-led action on climate change/ home improvement agency.
Greater Glasgow, Scotland
Cymraes / HowGet - Mostly retired, gwraig, mam, nain. Social Housing NED, Community Energy, Breeze, Triathlete. Can be found on my bike or in a lake
Buildings PassivHaus Energy Communities Forests
BE-ST is your launchpad to a net zero carbon built environment.
Empowering professional women in the retrofit industry.
Writing about heat pumps at heatpumped.org
Installing heat pumps at vayu.pro
Former YC founder and rocket propulsion engineer
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Chief Geek at Heat Geek, pedant and obsessive.
