Picture shows the new extension of an retrofitted house in Dublin

Way back in issue 12 of Passive House Plus, Lenny Antonelli wrote about an ambitious and complicated project — a partial #upgrade, partial #rebuild of an old detached property in Rathgar, south Dublin — that went on to achieve the onerous #Enerphit standard for #retrofit.
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We Can Make an Impact. Create a 100-year property loan for energy efficiency

The expense of deep retrofit can be a major barrier for homeowners.

Please sign this petition to champion an idea of a low % 100-year loan, secured against the property 👇

#passivhaus #enerPHit

Buildings are using 40% of the energy in the world today and are 80% less efficient than they could be, with not enough retrofits taking place fast enough to decarbonize the portfolios.
#Passivhaus
#EnerPHit
#HeatPumps
#DeepSynergisticRetrofits

#retrofit #enerphit #insulation #oldhouseproblems

Thrilled to see Hampstead #Passivhaus shortlisted for the 2026 RIBA London Awards.

A Victorian conservation-area townhouse retrofitted to certified #EnerPHit:
• ~90% cut in space heating
• 75% lower operational energy
• 58% lower whole life carbon

Heritage + deep decarbonisation at its best.

#Frankreich:
Großes Sanierungsprojekt mit hoher #Energieeffizenz:

#Sanierung zum Standard #EnerPHit - eines der Highlight-Themen bei der #28intPHC

65+ Vorträge
2 Jubiläumsfeiern (35 Jahre #Passivhaus und 30 Jahre Passivhaus Institut)
4 Exkursionen

ow.ly/tVfA50XPUPk

#Klimaschutz

We're going to be exhibiting at the homebuilding and renovating show - book your free tickets here shorturl.at/hYHy2
and come and see us on Stand G125

#Architecture #Passivhaus #Enerphit #AECB #escapetothecountry

Innovative Low Energy Architecture Projects by Fifteen 10 Explore Fifteen 10 Architects' innovative projects, focusing on sustainable design and energy-efficient homes in progress. Discover more!

Here is what we've been up to over the last year and a bit!

fifteen10architects.com/2026/02/06/w...

#Architecture #Passivhaus #Retrofit #Selfbuild #AECB #Carbonlite #Enerphit

🇬🇧 UK #Passivhaus Retrofit update
New research from the Passivhaus Trust shows #EnerPHit deep retrofits aren’t more expensive. Check out the newly updated guide: Passivhaus Retrofit in the UK.
👉 passivhaus.uk/#new

EnerPHit on Heritage Projects: Balancing Performance and Conservation | Her Retrofit Space (CIC) posted on the topic | LinkedIn Heritage retrofit is where theory is truly tested. Working with older buildings means navigating moisture risk, fabric performance, heritage constraints and ambitious energy targets all at once. Achieving EnerPHit in this context is possible but it requires deep building physics understanding and confident decision making. We are delighted to be hosting a CPD session with Greengauge Building Energy Consultants focused on Achieving EnerPHit on Heritage Projects. This session will explore • How to deliver EnerPHit using both the space heating and component routes • Practical strategies for heritage buildings rather than idealised case studies • Why moisture risk analysis is critical when designing internal wall insulation • How to balance performance, durability and conservation in older homes EnerPHit is the highest certification for deep retrofit of existing buildings. It adapts the Passivhaus standard to make it achievable for older homes while still demanding exceptional performance in insulation, airtightness and energy efficiency. This session is essential for anyone working or wishing to work seriously in heritage retrofit. You will be learning from: Paul Smith, Director at Greengauge A highly experienced Building Physics Consultant, Passivhaus Certifier and Certified Passivhaus Consultant with nearly two decades of experience in low energy building design and delivery. Maria Valkova, Building Physicist at Greengauge Specialising in hygrothermal analysis, moisture risk assessment, thermal bridging and retrofit strategy development, with experience across PHPP, IES and SAP. Maria brings a rigorous and climate focused approach to intelligent retrofit design. This CPD is part of the ongoing programme inside Her Retrofit Space, the UK wide community supporting professional women working in retrofit. If you are an architect, designer, retrofit coordinator, assessor, engineer, tradeswomen, installer, consultant or currently training and want access to high quality CPD, trusted technical insight and a supportive professional network, join us today at www.herretrofitspace.com 👉 Join Her Retrofit Space to access this CPD and our full library of expert led sessions.

🙌 Really looking forward to speaking at this!

#EnerPHit #Passivhaus #Retrofit

Picture shows a semi detached red brick house in Dublin, that has been retrofitted to the Enerphit standard

#Enerphit upgrade rejuvenates Rathgar redbrick

In issue 17 we visited a Dublin semi-d, brilliantly and carefully brought into the 21st century in terms of #energyperformance & living space, yet protecting it's century-old façade with #breathablematerials.

mailchi.mp/passivehouse...

#passivehouse

🎥 New iPHA Webinar Recording!
Engine 16, a historic NYC firehouse transformed into a fully electric, mixed-use multifamily building, achieving #EnerPHit certification, demonstrates how adaptive reuse can successfully combine preservation and high performance.
https://passipedia.org/webinars/engine16

A photo of the control panel to an MVHR unit showing external air temperature and incoming air temperature.

Pleasing. The MVHR unit doings its thing last night: external air temperature -3.5degC, incoming air warmed to 19degC by outgoing stale air. #EcoBungalow #passivhaus #passivehouse #enerphit #retrofit #mvhr #zehnder

34. Geeky stats for 2025 Warning: this blogpost contains a lot of geeky detail! Like all Air Source Heat Pumps, the Viessmann has an app to control it and provide feedback. It has a very handy annual analysis of energy use a...

Want lots of geeky detail about Air Source Heat Pump efficiency and space heating demand? You’ve come to the right place! #EcoBungalow #ASHP #PassivHaus #PassiveHouse #EnerPHit #Retrofit #PHPP

🔎 #PassiveHouse Database Spotlight
Glover Passivhaus in NSW, Australia, is a certified #EnerPHit Plus retrofit of a 1920s California Bungalow, combining heritage with ultra-low energy #performance.

Discover more about this and many other projects: https://ow.ly/B2Rn50XLqyw
©lukebutterly

Cut VAT on EnerPHit/AECB retrofit = more demand, better homes, new jobs, lower carbon. With #NLARetrofit Summit here, it’s time to act.

Read the case → https://bit.ly/4opegBi

#Retrofit #EnerPHit #AECB #VAT #NetZero #AdaptiveReuse #BuiltEnvironment #ConstructionJobs #London #Policy

Two #EnerPHit projects in construction open this weekend for #PHOpenDays!

🏛️ Sat 8 Nov – Central Lodge, Birkenhead Park
🏠 Sun 9 Nov – Stuart Rd, Liverpool

Proud to support these inspiring #Passivhaus #retrofit projects.

Tix 🔗 www.passivhaustrust.org.uk/event_detail...

#LowCarbon #Sustainability

33. Air Source Heat Pump MythBuster Research shows that 94% of UK homeowners with heat pumps are satisfied or extremely satisfied with their heating. This compares to 85% for the most common heating system in the UK, the mains gas boile...

94% of UK Homeowners with heat pumps are satisfied with their heating. Yet social media is packed with claims that they don’t work in old houses, are expensive to run and are noisy. What’s the truth?

New blogpost takes a look at the myths.

#EcoBungalow #Passivhaus #EnerPHit #Retrofit #ASHP

Wonderful to see that our #Hampstead #PassiveHouse project has received a Special Mention from the Camden Design Awards for exemplary sustainable design. We supported Guy Stansfeld Architecture with #Passivhaus #EnerPHit design and whole life carbon analysis. Congrats to the whole project team!

What does a Passivhaus architect do on a Saturday night?

#diy #homeimprovement #retrofit #insulation #airtightness #enerphit #passivhaus

Some shots of the retrofit works carried out on our house over the past few years. Jute hemp insulation in the suspended ground floor, woodfibre to the solid ext wall for breathability and redoing the shabby loft conversion with extra insulation and air tight membrane #retrofit #enerphit #insulation

If you're one of our Hub members, don't forget we've got another 'ask the expert' session with Es Tresidder on Tuesday at 8pm.

His specialist areas are building physics, moisture management and DIY #retrofit.

hphhub.com/ask-the-expe...

#SelfBuild #Passivhaus #EnerPHit

Picture is a street level view of a newly restored tenement building in Glasgow

Flat earth - Tenement #retrofit shows solution for Glasgow archetype

mailchi.mp/passivehouse...

#passivehouse #passivaus #enerphit

Butterflies, bees and beetles enjoying the evolving meadow. #ecobungalow #passivhaus #passivehouse #retrofit #enerphit #rewilding #sustainable #meadow #nativespecies #bees #butterflies #boston seeds

📣 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....

And the numbers are in! A full year’s energy use in the #EcoBungalow following its retrofit. New blogpost reports a spectacular reduction in kWh and a much, MUCH more comfortable home to live in. #passivhaus #passivehouse
#retrofit #enerphit #ashp #mvhr #insulation
www.ecobungalow.co/post/32-a-ye...

Exciting to see vacuum glazing installed at Central Lodge, a Grade II listed building we've supported with #EnerPHit design. Our client Andy explains how the vac glass has made #Passivaus possible on his property.
m.youtube.com/watch?v=8R_A...

Passivhaus Retrofit Planning Made Simple Discover how Passivhaus retrofits planning can be made simple, reduce costs, and avoid common mistakes—without compromising lifestyle

Thinking of a Passivhaus retrofit? Here’s a secret:
It doesn’t have to be complicated—if you plan it like a recipe.
A quick thread on how a retrofit “menu” makes all the difference

www.ecodesignconsultants.co.uk/passivhaus-r...

#Passivhaus #EnerPHit #GreenHomes #SustainableLiving

On TODAY! The fifth webinar of the 2025 Large & Complex #Passivhaus #Masterclass series

🏘️Discover how #PHPP & #EnerPHit are transforming residential #retrofits
📍Online
⏰13:00 - 14:30
⭐2 PHI credit renewal points
🔗passivhaustrust.org....

Over the years we've been filming through entire house builds and retrofits for our Hub members.

This is the Kinver project in Oxford.

hphhub.com

#Retrofit #Extension #EnerPHit