#passivehouse — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #passivehouse, aggregated by home.social.
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May not just the 4th but Physics be with you. Benefit from clarity and clear standards, replace confidence with evidence, for real-life performance as planned. https://passivehouse.com/en/ipha/passive-house/ #PassiveHouse #Passivhaus #EnerPHit #Energyefficiency
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#PassiveHouse around the world! Australian Passive House Association THRIVE26 conference. Secure your ticket! https://www.passivhausassociation.com.au/thrive-2026-passivhaus-conference #Passivhaus #EnerPHit #Energyefficiency
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#PassiveHouse around the world! Australian Passive House Association THRIVE26 conference. Secure your ticket! https://www.passivhausassociation.com.au/thrive-2026-passivhaus-conference #Passivhaus #EnerPHit #Energyefficiency
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#PassiveHouse around the world! Australian Passive House Association THRIVE26 conference. Secure your ticket! https://www.passivhausassociation.com.au/thrive-2026-passivhaus-conference #Passivhaus #EnerPHit #Energyefficiency
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#PassiveHouse around the world! Australian Passive House Association THRIVE26 conference. Secure your ticket! https://www.passivhausassociation.com.au/thrive-2026-passivhaus-conference #Passivhaus #EnerPHit #Energyefficiency
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#PassiveHouse around the world! Australian Passive House Association THRIVE26 conference. Secure your ticket! https://www.passivhausassociation.com.au/thrive-2026-passivhaus-conference #Passivhaus #EnerPHit #Energyefficiency
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Heat Recovery Ventilator (HRV) — Operating Principle
A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.
---
How It Works
Two airflows:
Exhaust air (warm, from indoors)
Supply air (cold, from outside)
They pass through a heat exchanger:
separated by plates or channels
no direct mixing
heat transfers through the material (conduction)
Result: → supply air is preheated
→ exhaust air is cooled
→ overall heat loss is reduced---
Types of Recuperators
1. Plate Heat Exchanger
aluminum or plastic plates
efficiency: ~60–90%
no moving parts
2. Rotary (Wheel) Heat Exchanger
rotating drum
transfers heat and some moisture
efficiency: up to ~85–90%
3. Counterflow Heat Exchanger
air streams move in opposite directions
highest efficiency: up to ~95%
---
What Is Transferred
heat (primary)
sometimes moisture (in enthalpy units)
---
Efficiency Example
outside: 0°C
indoor: +22°C
after recovery: ~16–20°C
---
Advantages
reduced heating energy demand
continuous ventilation without major heat loss
improved indoor air quality
---
Limitations
frost formation in winter (needs bypass or preheater)
filter maintenance required
upfront cost
---
Core Idea
A recuperator doesn’t generate heat — it recovers and reuses it.
#HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir
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Heat Recovery Ventilator (HRV) — Operating Principle
A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.
---
How It Works
Two airflows:
Exhaust air (warm, from indoors)
Supply air (cold, from outside)
They pass through a heat exchanger:
separated by plates or channels
no direct mixing
heat transfers through the material (conduction)
Result: → supply air is preheated
→ exhaust air is cooled
→ overall heat loss is reduced---
Types of Recuperators
1. Plate Heat Exchanger
aluminum or plastic plates
efficiency: ~60–90%
no moving parts
2. Rotary (Wheel) Heat Exchanger
rotating drum
transfers heat and some moisture
efficiency: up to ~85–90%
3. Counterflow Heat Exchanger
air streams move in opposite directions
highest efficiency: up to ~95%
---
What Is Transferred
heat (primary)
sometimes moisture (in enthalpy units)
---
Efficiency Example
outside: 0°C
indoor: +22°C
after recovery: ~16–20°C
---
Advantages
reduced heating energy demand
continuous ventilation without major heat loss
improved indoor air quality
---
Limitations
frost formation in winter (needs bypass or preheater)
filter maintenance required
upfront cost
---
Core Idea
A recuperator doesn’t generate heat — it recovers and reuses it.
#HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir
-
Heat Recovery Ventilator (HRV) — Operating Principle
A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.
---
How It Works
Two airflows:
Exhaust air (warm, from indoors)
Supply air (cold, from outside)
They pass through a heat exchanger:
separated by plates or channels
no direct mixing
heat transfers through the material (conduction)
Result: → supply air is preheated
→ exhaust air is cooled
→ overall heat loss is reduced---
Types of Recuperators
1. Plate Heat Exchanger
aluminum or plastic plates
efficiency: ~60–90%
no moving parts
2. Rotary (Wheel) Heat Exchanger
rotating drum
transfers heat and some moisture
efficiency: up to ~85–90%
3. Counterflow Heat Exchanger
air streams move in opposite directions
highest efficiency: up to ~95%
---
What Is Transferred
heat (primary)
sometimes moisture (in enthalpy units)
---
Efficiency Example
outside: 0°C
indoor: +22°C
after recovery: ~16–20°C
---
Advantages
reduced heating energy demand
continuous ventilation without major heat loss
improved indoor air quality
---
Limitations
frost formation in winter (needs bypass or preheater)
filter maintenance required
upfront cost
---
Core Idea
A recuperator doesn’t generate heat — it recovers and reuses it.
#HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir
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#PassiveHouse around the world! Mark your calendars and register for The Passive House Network Conference 2026! https://passivehousenetwork.org/the-passive-house-network-conference-2026/ #Passivhaus #EnerPHit #Energyefficiency
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#PassiveHouse around the world! Mark your calendars and register for The Passive House Network Conference 2026! https://passivehousenetwork.org/the-passive-house-network-conference-2026/ #Passivhaus #EnerPHit #Energyefficiency
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How do you design highly energy-efficient educational facilities that are both sustainable and inspiring for students?
On 26 April, the 28th International Passive House Conference in Essen offers a unique building tour to see real-world examples in action.
Register and learn more: https://passivhaustagung.de/en/conference/building-tours/
#PassiveHouse #EducationalBuildings #Sustainability #28intPHC -
Hi there!
#newhere iPHA is finally a part of Mastodon. We are looking forward to sharing and discussing news on #Passivhaus #PassiveHouse , #EnerPHit and related fields! -
Hi there!
#newhere iPHA is finally a part of Mastodon. We are looking forward to sharing and discussing news on #Passivhaus #PassiveHouse , #EnerPHit and related fields! -
Hi there!
#newhere iPHA is finally a part of Mastodon. We are looking forward to sharing and discussing news on #Passivhaus #PassiveHouse , #EnerPHit and related fields! -
Hi there!
#newhere iPHA is finally a part of Mastodon. We are looking forward to sharing and discussing news on #Passivhaus #PassiveHouse , #EnerPHit and related fields! -
50 year old home transformed into #biobased #passivehouse "✅ Half a metre of straw around the entire house ✅ Three layers of clay as a protective skin ✅ Sheep's wool instead of PUR ✅ A vapour-permeable structure that regulates humidity ✅ A roof with sun and greenery" www.linkedin.com/posts/groene...
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50 year old home transformed into #biobased #passivehouse "✅ Half a metre of straw around the entire house ✅ Three layers of clay as a protective skin ✅ Sheep's wool instead of PUR ✅ A vapour-permeable structure that regulates humidity ✅ A roof with sun and greenery" www.linkedin.com/posts/groene...
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Watching "Guy Martin's House Without Bills" on #Channel4. Been looking forward to this!
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I have both of Marion's "Residential Retrofit" books, so already knew this would be a good episode, even then it blew me away. Myth busting that low energy buildings require the occupant to "manage" their environment, and the "rebound effect" is a non-issue as once energy demand has been reduced by 80%, even doubling that still works out to be less energy.
https://www.buzzsprout.com/2394957/episodes/18467218-mark-talks-to-marion-baeli
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I have both of Marion's "Residential Retrofit" books, so already knew this would be a good episode, even then it blew me away. Myth busting that low energy buildings require the occupant to "manage" their environment, and the "rebound effect" is a non-issue as once energy demand has been reduced by 80%, even doubling that still works out to be less energy.
https://www.buzzsprout.com/2394957/episodes/18467218-mark-talks-to-marion-baeli
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I have both of Marion's "Residential Retrofit" books, so already knew this would be a good episode, even then it blew me away. Myth busting that low energy buildings require the occupant to "manage" their environment, and the "rebound effect" is a non-issue as once energy demand has been reduced by 80%, even doubling that still works out to be less energy.
https://www.buzzsprout.com/2394957/episodes/18467218-mark-talks-to-marion-baeli
-
I have both of Marion's "Residential Retrofit" books, so already knew this would be a good episode, even then it blew me away. Myth busting that low energy buildings require the occupant to "manage" their environment, and the "rebound effect" is a non-issue as once energy demand has been reduced by 80%, even doubling that still works out to be less energy.
https://www.buzzsprout.com/2394957/episodes/18467218-mark-talks-to-marion-baeli
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@coldclimate I've been reading plenty on this topic for a good few years now but non of my notes are quite organised.
Firstly, I'd recommend this book: https://www.amazon.co.uk/dp/0993077234 even if you know most of it, I feel like it cements things, but if you don't it gives you the words and generally how the different measures work together.
There are many retrofit co-op which have already been referenced, but I'm still not aware of any which operate in the north east.
You mention #PassiveHouse, their lesser standard #EnerPHit is a good term for searching, then there's #AECB which have more attainable standards while still taking a holistic approach.
This whole podcast is a treasure trove but this episode in particular: https://www.houseplanninghelp.com/hph383-a-beginners-guide-to-creating-a-comfortable-home/
Understand the current building fabric, the materials used, and the effects of using non-"breathable" materials on buildings which are. I'm generally for woodfibre or similar first, and then PIR (or similar) when others aren't so suitable. Trades seem to opt for PIR for everything.
I like the guides on this site: https://www.ecologicalbuildingsystems.com/post/best-practice-approach-insulating-suspended-timber-floors (it will look strangely familiar to the wall I'm working on)
Insulation is one big part, it has to be continuous, but air tightness (not just "draught proofing") as such an impact on both comfort and heat retention. Ventilation is another, can't seal up without letting that moisture escape, for that I'm looking into #MVHR, also helps keep down CO2 levels.
And finally, have a plan, with deep(er)-retrofit, everything relates to something else so the sequence is critical.
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@coldclimate I've been reading plenty on this topic for a good few years now but non of my notes are quite organised.
Firstly, I'd recommend this book: https://www.amazon.co.uk/dp/0993077234 even if you know most of it, I feel like it cements things, but if you don't it gives you the words and generally how the different measures work together.
There are many retrofit co-op which have already been referenced, but I'm still not aware of any which operate in the north east.
You mention #PassiveHouse, their lesser standard #EnerPHit is a good term for searching, then there's #AECB which have more attainable standards while still taking a holistic approach.
This whole podcast is a treasure trove but this episode in particular: https://www.houseplanninghelp.com/hph383-a-beginners-guide-to-creating-a-comfortable-home/
Understand the current building fabric, the materials used, and the effects of using non-"breathable" materials on buildings which are. I'm generally for woodfibre or similar first, and then PIR (or similar) when others aren't so suitable. Trades seem to opt for PIR for everything.
I like the guides on this site: https://www.ecologicalbuildingsystems.com/post/best-practice-approach-insulating-suspended-timber-floors (it will look strangely familiar to the wall I'm working on)
Insulation is one big part, it has to be continuous, but air tightness (not just "draught proofing") as such an impact on both comfort and heat retention. Ventilation is another, can't seal up without letting that moisture escape, for that I'm looking into #MVHR, also helps keep down CO2 levels.
And finally, have a plan, with deep(er)-retrofit, everything relates to something else so the sequence is critical.
-
@coldclimate I've been reading plenty on this topic for a good few years now but non of my notes are quite organised.
Firstly, I'd recommend this book: https://www.amazon.co.uk/dp/0993077234 even if you know most of it, I feel like it cements things, but if you don't it gives you the words and generally how the different measures work together.
There are many retrofit co-op which have already been referenced, but I'm still not aware of any which operate in the north east.
You mention #PassiveHouse, their lesser standard #EnerPHit is a good term for searching, then there's #AECB which have more attainable standards while still taking a holistic approach.
This whole podcast is a treasure trove but this episode in particular: https://www.houseplanninghelp.com/hph383-a-beginners-guide-to-creating-a-comfortable-home/
Understand the current building fabric, the materials used, and the effects of using non-"breathable" materials on buildings which are. I'm generally for woodfibre or similar first, and then PIR (or similar) when others aren't so suitable. Trades seem to opt for PIR for everything.
I like the guides on this site: https://www.ecologicalbuildingsystems.com/post/best-practice-approach-insulating-suspended-timber-floors (it will look strangely familiar to the wall I'm working on)
Insulation is one big part, it has to be continuous, but air tightness (not just "draught proofing") as such an impact on both comfort and heat retention. Ventilation is another, can't seal up without letting that moisture escape, for that I'm looking into #MVHR, also helps keep down CO2 levels.
And finally, have a plan, with deep(er)-retrofit, everything relates to something else so the sequence is critical.
-
@coldclimate I've been reading plenty on this topic for a good few years now but non of my notes are quite organised.
Firstly, I'd recommend this book: https://www.amazon.co.uk/dp/0993077234 even if you know most of it, I feel like it cements things, but if you don't it gives you the words and generally how the different measures work together.
There are many retrofit co-op which have already been referenced, but I'm still not aware of any which operate in the north east.
You mention #PassiveHouse, their lesser standard #EnerPHit is a good term for searching, then there's #AECB which have more attainable standards while still taking a holistic approach.
This whole podcast is a treasure trove but this episode in particular: https://www.houseplanninghelp.com/hph383-a-beginners-guide-to-creating-a-comfortable-home/
Understand the current building fabric, the materials used, and the effects of using non-"breathable" materials on buildings which are. I'm generally for woodfibre or similar first, and then PIR (or similar) when others aren't so suitable. Trades seem to opt for PIR for everything.
I like the guides on this site: https://www.ecologicalbuildingsystems.com/post/best-practice-approach-insulating-suspended-timber-floors (it will look strangely familiar to the wall I'm working on)
Insulation is one big part, it has to be continuous, but air tightness (not just "draught proofing") as such an impact on both comfort and heat retention. Ventilation is another, can't seal up without letting that moisture escape, for that I'm looking into #MVHR, also helps keep down CO2 levels.
And finally, have a plan, with deep(er)-retrofit, everything relates to something else so the sequence is critical.
-
@coldclimate I've been reading plenty on this topic for a good few years now but non of my notes are quite organised.
Firstly, I'd recommend this book: https://www.amazon.co.uk/dp/0993077234 even if you know most of it, I feel like it cements things, but if you don't it gives you the words and generally how the different measures work together.
There are many retrofit co-op which have already been referenced, but I'm still not aware of any which operate in the north east.
You mention #PassiveHouse, their lesser standard #EnerPHit is a good term for searching, then there's #AECB which have more attainable standards while still taking a holistic approach.
This whole podcast is a treasure trove but this episode in particular: https://www.houseplanninghelp.com/hph383-a-beginners-guide-to-creating-a-comfortable-home/
Understand the current building fabric, the materials used, and the effects of using non-"breathable" materials on buildings which are. I'm generally for woodfibre or similar first, and then PIR (or similar) when others aren't so suitable. Trades seem to opt for PIR for everything.
I like the guides on this site: https://www.ecologicalbuildingsystems.com/post/best-practice-approach-insulating-suspended-timber-floors (it will look strangely familiar to the wall I'm working on)
Insulation is one big part, it has to be continuous, but air tightness (not just "draught proofing") as such an impact on both comfort and heat retention. Ventilation is another, can't seal up without letting that moisture escape, for that I'm looking into #MVHR, also helps keep down CO2 levels.
And finally, have a plan, with deep(er)-retrofit, everything relates to something else so the sequence is critical.
-
I live in an UK 1950s semi. I've slapped solar and a battery into it, and over the next few years I want to step up the energy efficiency+eco impact with retrofitting.
Anybody know of any useful blogs or resources? Any localish companies (North East) who can help?
I'm thinking about #insulation, #underfloorheating, #heatpump, what else? #passivehouse
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I live in an UK 1950s semi. I've slapped solar and a battery into it, and over the next few years I want to step up the energy efficiency+eco impact with retrofitting.
Anybody know of any useful blogs or resources? Any localish companies (North East) who can help?
I'm thinking about #insulation, #underfloorheating, #heatpump, what else? #passivehouse
-
I live in an UK 1950s semi. I've slapped solar and a battery into it, and over the next few years I want to step up the energy efficiency+eco impact with retrofitting.
Anybody know of any useful blogs or resources? Any localish companies (North East) who can help?
I'm thinking about #insulation, #underfloorheating, #heatpump, what else? #passivehouse
-
I live in an UK 1950s semi. I've slapped solar and a battery into it, and over the next few years I want to step up the energy efficiency+eco impact with retrofitting.
Anybody know of any useful blogs or resources? Any localish companies (North East) who can help?
I'm thinking about #insulation, #underfloorheating, #heatpump, what else? #passivehouse
-
I live in an UK 1950s semi. I've slapped solar and a battery into it, and over the next few years I want to step up the energy efficiency+eco impact with retrofitting.
Anybody know of any useful blogs or resources? Any localish companies (North East) who can help?
I'm thinking about #insulation, #underfloorheating, #heatpump, what else? #passivehouse
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• -14°C this morning, -4°C now.
• air enters the ventilation at 5°C thanks to the passive ground-coupled heat exchanger (+9°C)
• supplied air is at 21°C thanks to the air-to-air heat exchanger (+16°C)
• extracted air is at 24°C
• discharged air is at 8°CIt consumes around 300W of electricity.
The ventilation maintains the temperature whilst renewing air. The greenhouse heats the house. It's currently at 32°C.
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This is the temperature in our guest house in Vermont where outside temperatures have rarely been above freezing. The heating has been off since we left over a week ago.
That blip around 4am (~11pm US time) is interesting. It’s caused by our server rack running backups, increasing its power consumption by about 30W. In a different room.
We can tell if our backups are working by monitoring the temperature of our house.
#homeassistant #passivehouse #energy #efficiency #insulation
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♨️ Why is Annualized geosolar heating not more popular? #permaculture #energy #lowtech #degrowth #sustainability #passivehouse #passivhaus #solarpunk
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Okay one more article from dezeen and I need to grab some dinner.
https://www.dezeen.com/2025/12/11/building-announcements-2025/
Which building story grabs your attention?
I'm interested in Brooklyn's Passivhaus project for sure. And to some extent I might follow Noem. The new airport design for Bhutan looks gorgeous. What will it's HVAC be like?
#architecture #building #buildings #construction #design #futbol #PassiveHouse #PassivHaus #transportation
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I keep posting my #retrofit stuff to bsky as that seems to be where the other #passivehouse people are but ought to post them here also:
Got my work cut out for the weekend. Bedroom bay window is a stud wall filled with brick off cuts. To be insulated with 160mm of the finest German made woodfibre. New book for if I get bored too. More details in alt text.
Current U-value is ~2.1W/(m²K), will be ~0.22W/(m²K)
From the thermal image, can see how bad the problem is. The detail is showing a horizontal midsection slice, it's also more complex as this is a curved wall. I hope to also insulate the part of the wall between the floor joists too.
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@quixoticgeek 💯! It's baffling that most newly built houses aren't built to the #PassiveHouse standard.
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Yesterday I hooked up an Olimex ESP32-POE-IND to the DS18B20 temperature sensor we have in a pipe underneath our concrete foundation slab in the guest house. It was something of a relief to see that a) the sensor worked, and b) the value is stable at exactly where I'd expect it to be!
We hav sensors like this embedded around the building, mainly out of curiosity. It's my first time using a PoE ESP32 too - it worked great!
#homeassistant #esphome #esp32 #building #diy #passivehouse #energy
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https://www.europesays.com/ie/170754/ Faveker’s Tailor-Made Tiled Facade Brings Personality and Efficiency to the New Muskiz Secondary School #Architecture #Arts #ArtsAndDesign #ArtsAndDesign #ArtsDesign #Design #EducationBuidling #EducationCenter #Éire #Entertainment #Facade #FacadeSystem #IE #Ireland #PassiveHouse #SchoolArchitecture #SponsoredPost #SustainableArchitecture #tiles
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Pros and cons of living in a PassivHaus in Australia:
https://www.abc.net.au/news/2025-10-30/grand-designs-australia-passive-house-pros-cons-ryan-rye-cave/105790082
#Architecture #PassivHaus #PassiveHouse #EnergyEfficientHome -
Pros and cons of living in a PassivHaus in Australia:
https://www.abc.net.au/news/2025-10-30/grand-designs-australia-passive-house-pros-cons-ryan-rye-cave/105790082
#Architecture #PassivHaus #PassiveHouse #EnergyEfficientHome -
Pros and cons of living in a PassivHaus in Australia:
https://www.abc.net.au/news/2025-10-30/grand-designs-australia-passive-house-pros-cons-ryan-rye-cave/105790082
#Architecture #PassivHaus #PassiveHouse #EnergyEfficientHome -
Pros and cons of living in a PassivHaus in Australia:
https://www.abc.net.au/news/2025-10-30/grand-designs-australia-passive-house-pros-cons-ryan-rye-cave/105790082
#Architecture #PassivHaus #PassiveHouse #EnergyEfficientHome -
Pros and cons of living in a PassivHaus in Australia:
https://www.abc.net.au/news/2025-10-30/grand-designs-australia-passive-house-pros-cons-ryan-rye-cave/105790082
#Architecture #PassivHaus #PassiveHouse #EnergyEfficientHome -
Our energy-efficient guest house is working well so far - we haven't heated it yet, and despite several freezing nights (last night got down to 27°F), the temperature inside is currently 68°F. The air sealing and insulation are doing their job.
We're really only in there a few days a week working on it, with lights, a few power tools, etc. Otherwise there's a dehumidifier keeping the humidity at ~45% to help the drywall mud dry.
#energy #energyefficiency #passivhaus #passivehouse #building
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Spent the evening in a pub with nerds of the #PassiveHouse variety, sorta makes a change from the computer-y variety. Although from learning way more about building physics and retrofit, I’m seeing parallels between that and DevOps.