Sean Hood
@snhd.co
Get paid to keep servers happy. Hobby collector: Lazy photographer, gravel rider, cider drinker, home automation tinkerer, VW owner, passivhaus/retrofit enthusiast, lurcher & greyhound owner; not all at the same time.
snhd.co
📍Sheffield, UK
snhd.co
📍Sheffield, UK
Pinned
Do we do #introduction's on the butterfly app? Anyway, I'm Sean, Cloud Engineer/SRE at an EdTech company. Interested in #observability, #containers and the related glue. Based in #Sheffield. Outside of work I dabble in #homeautomation, #photograpy, #cycling, #bouldering and generally being #outdoors
Reposted by Sean Hood
So that was decent. Worth finding on catch up if you missed it.
Props to Hannah from Progress in Practice for representing women working in retrofit - I promise despite the impression that might have been given, there are a few of us!
Props to Hannah from Progress in Practice for representing women working in retrofit - I promise despite the impression that might have been given, there are a few of us!
This is on tonight on Channel 4 at 9pm.
Very interested to see how they make telly out of retrofit.
Very interested to see how they make telly out of retrofit.
Friends and colleagues of mine are due to be on this next week.
Hoping the TV people do all their hard work and expertise justice!
Hoping the TV people do all their hard work and expertise justice!
February 9, 2026 at 11:00 PM
So that was decent. Worth finding on catch up if you missed it.
Props to Hannah from Progress in Practice for representing women working in retrofit - I promise despite the impression that might have been given, there are a few of us!
Props to Hannah from Progress in Practice for representing women working in retrofit - I promise despite the impression that might have been given, there are a few of us!
While watching RTÉ's "Heat my Home", I was wishing that there was going to be a UK equivalent. Seems like Channel4 had read my mind.
Not only with a great presenter like Guy Martin, but also @aecb.bsky.social Greater Manchester's local group ran by Progress in Practice
Looking forward to watching.
Not only with a great presenter like Guy Martin, but also @aecb.bsky.social Greater Manchester's local group ran by Progress in Practice
Looking forward to watching.
📺 Guy Martin's 'House Without Bills'
Passivhaus retrofit takes centre stage in the Channel 4 programme Guy Martin’s 'House Without Bills' on Monday 9 February 2026 at 9pm.
Read more:
https://www.passivhaustrust.org.uk/news/detail/?nId=1534
AECB Passive House Plus Nesta Passive House Accelerator
Passivhaus retrofit takes centre stage in the Channel 4 programme Guy Martin’s 'House Without Bills' on Monday 9 February 2026 at 9pm.
Read more:
https://www.passivhaustrust.org.uk/news/detail/?nId=1534
AECB Passive House Plus Nesta Passive House Accelerator
February 3, 2026 at 2:42 PM
While watching RTÉ's "Heat my Home", I was wishing that there was going to be a UK equivalent. Seems like Channel4 had read my mind.
Not only with a great presenter like Guy Martin, but also @aecb.bsky.social Greater Manchester's local group ran by Progress in Practice
Looking forward to watching.
Not only with a great presenter like Guy Martin, but also @aecb.bsky.social Greater Manchester's local group ran by Progress in Practice
Looking forward to watching.
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.
www.buzzsprout.com/2394957/epis...
www.buzzsprout.com/2394957/epis...
Mark talks to Marion Baeli - The Building Podcast
The retro-fit market for domestic homes in the UK is enormous. We have some of the oldest housing stock in Europe that accounts for 20% of national carbon emissions. There are 27 million h...
www.buzzsprout.com
February 3, 2026 at 2:13 PM
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.
www.buzzsprout.com/2394957/epis...
www.buzzsprout.com/2394957/epis...
Reposted by Sean Hood
imagine looking up at the vast and harrowing beauty of outer space and thinking not about how short and fleeting and precious our intertwined existence in this realm is but instead ‘wow this place needs some fuckin data centres’
February 3, 2026 at 1:48 PM
imagine looking up at the vast and harrowing beauty of outer space and thinking not about how short and fleeting and precious our intertwined existence in this realm is but instead ‘wow this place needs some fuckin data centres’
Reposted by Sean Hood
I'm so excited for the Tour de France Femmes coming to Sheffield. I hope they close Snake Pass so we can cycle up there to watch them race.
www.bbc.co.uk/news/article...
www.bbc.co.uk/news/article...
Tour de France Femmes in Yorkshire 'will boost women's cycling'
The start of the annual elite women’s cycling race will take place in Yorkshire.
www.bbc.co.uk
January 15, 2026 at 10:49 PM
I'm so excited for the Tour de France Femmes coming to Sheffield. I hope they close Snake Pass so we can cycle up there to watch them race.
www.bbc.co.uk/news/article...
www.bbc.co.uk/news/article...
DIYers bringing #PassiveHouse to the masses? youtube.com/watch?v=v854...
Absolutely loved this. So refreshing to hear people talk about this sorta stuff, in such depth, when they aren’t in the trade. Hopefully it might teach others to not to build crap leaky buildings with PIR. I can only hope.
Absolutely loved this. So refreshing to hear people talk about this sorta stuff, in such depth, when they aren’t in the trade. Hopefully it might teach others to not to build crap leaky buildings with PIR. I can only hope.
INSULATING MORE DOESN'T ALWAYS MAKE SENSE! - How we built our home using science
YouTube video by The Restoration Couple
m.youtube.com
January 15, 2026 at 9:47 PM
DIYers bringing #PassiveHouse to the masses? youtube.com/watch?v=v854...
Absolutely loved this. So refreshing to hear people talk about this sorta stuff, in such depth, when they aren’t in the trade. Hopefully it might teach others to not to build crap leaky buildings with PIR. I can only hope.
Absolutely loved this. So refreshing to hear people talk about this sorta stuff, in such depth, when they aren’t in the trade. Hopefully it might teach others to not to build crap leaky buildings with PIR. I can only hope.
@benadamsmith.bsky.social Catching up with HPH over Christmas; sad to hear The Hub is no more. I was just thinking about joining too, as after listening to so many eps, I recently figured self-build is for me in the future. My question is: could the resources& case studies be available as a one off?
January 15, 2026 at 10:27 AM
@benadamsmith.bsky.social Catching up with HPH over Christmas; sad to hear The Hub is no more. I was just thinking about joining too, as after listening to so many eps, I recently figured self-build is for me in the future. My question is: could the resources& case studies be available as a one off?
Reposted by Sean Hood
It's been COLD. What flow temperatures are you folks using? (And for oil / gas / heat pump, or what? And to achieve what room temp?)
Currently still working fine at 45C here in Belfast, gas combi, 19-20C target room temp.
Currently still working fine at 45C here in Belfast, gas combi, 19-20C target room temp.
January 7, 2026 at 8:44 AM
It's been COLD. What flow temperatures are you folks using? (And for oil / gas / heat pump, or what? And to achieve what room temp?)
Currently still working fine at 45C here in Belfast, gas combi, 19-20C target room temp.
Currently still working fine at 45C here in Belfast, gas combi, 19-20C target room temp.
Reposted by Sean Hood
people starting the new year with a shiny new substack when @ghost.org is literally right there smdh my head
January 5, 2026 at 3:31 PM
people starting the new year with a shiny new substack when @ghost.org is literally right there smdh my head
Reposted by Sean Hood
I just posted some (a lot of?) pictures from my cycling trip through the length of Japan on my blog. sebastiandahl.com/blog/2025124...
#japancyclingnavigator #bikepacking #cycletouring #japan
#japancyclingnavigator #bikepacking #cycletouring #japan
Cycling the length of Japan — Sébastian Dahl
Marie and I spent 3 months in Japan this summer. It’s hard to summarise such a long trip in such an interesting country, but here goes an attempt. Planning the trip started more than a year before. ...
sebastiandahl.com
December 8, 2025 at 10:07 AM
I just posted some (a lot of?) pictures from my cycling trip through the length of Japan on my blog. sebastiandahl.com/blog/2025124...
#japancyclingnavigator #bikepacking #cycletouring #japan
#japancyclingnavigator #bikepacking #cycletouring #japan
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)
#retrofit #aecb
Current U-value is ~2.1W/(m²K), will be ~0.22W/(m²K)
#retrofit #aecb
December 3, 2025 at 10:50 PM
Reposted by Sean Hood
Good.
George Clarke wants homeowners and businesses to shun ‘dishonest’ firms Arconic, Kingspan and Celotex
www.theguardian.com/uk-news/2025...
George Clarke wants homeowners and businesses to shun ‘dishonest’ firms Arconic, Kingspan and Celotex
www.theguardian.com/uk-news/2025...
Architect George Clarke calls for boycott of firms criticised by Grenfell inquiry
TV personality wants homeowners and businesses to shun ‘dishonest’ firms Arconic, Kingspan and Celotex
www.theguardian.com
November 23, 2025 at 7:09 PM
Good.
George Clarke wants homeowners and businesses to shun ‘dishonest’ firms Arconic, Kingspan and Celotex
www.theguardian.com/uk-news/2025...
George Clarke wants homeowners and businesses to shun ‘dishonest’ firms Arconic, Kingspan and Celotex
www.theguardian.com/uk-news/2025...
Reposted by Sean Hood
There’s some very bad news hidden in the Ofgem price cap for January announced yesterday: the electricity to gas price ratio has jumped to 4.67, its highest level since before the energy crisis.
This is a big barrier to households adopting heat pumps in Britain, and threatens our climate goals
This is a big barrier to households adopting heat pumps in Britain, and threatens our climate goals
November 22, 2025 at 7:51 AM
There’s some very bad news hidden in the Ofgem price cap for January announced yesterday: the electricity to gas price ratio has jumped to 4.67, its highest level since before the energy crisis.
This is a big barrier to households adopting heat pumps in Britain, and threatens our climate goals
This is a big barrier to households adopting heat pumps in Britain, and threatens our climate goals
Saw a video yesterday, someone talking about new Vaillant aroTHERM Plus #ashp : www.vaillant-group.com/news-stories...
Distance req either side reduced: 100cm to 50cm
Sound level (5kW): 51dB(A) to 44.3dB(A)
Data: www.vaillant.de/heizung/prod...
The video: www.youtube.com/watch?v=Czwk...
Distance req either side reduced: 100cm to 50cm
Sound level (5kW): 51dB(A) to 44.3dB(A)
Data: www.vaillant.de/heizung/prod...
The video: www.youtube.com/watch?v=Czwk...
New aroTHERM plus heat pump: More efficient, quieter, and flexible installation options
New aroTHERM plus heat pump: More efficient, quieter, and flexible installation options
www.vaillant-group.com
November 19, 2025 at 10:05 AM
Saw a video yesterday, someone talking about new Vaillant aroTHERM Plus #ashp : www.vaillant-group.com/news-stories...
Distance req either side reduced: 100cm to 50cm
Sound level (5kW): 51dB(A) to 44.3dB(A)
Data: www.vaillant.de/heizung/prod...
The video: www.youtube.com/watch?v=Czwk...
Distance req either side reduced: 100cm to 50cm
Sound level (5kW): 51dB(A) to 44.3dB(A)
Data: www.vaillant.de/heizung/prod...
The video: www.youtube.com/watch?v=Czwk...
@archtesta.bsky.social Good to chat to you at the Homebuilding show! ubakus.de was the site I mentioned, and this was the data I got about phase shift: bsky.app/profile/snhd... PIR was even worse than my memory served at 6.5hr. Not a replacement for WUFI but feels useful for a layperson.
November 2, 2025 at 2:57 PM
@archtesta.bsky.social Good to chat to you at the Homebuilding show! ubakus.de was the site I mentioned, and this was the data I got about phase shift: bsky.app/profile/snhd... PIR was even worse than my memory served at 6.5hr. Not a replacement for WUFI but feels useful for a layperson.
Wishing wood fibre insulation was as readily available in the UK as it was in France (this was at Brico Depot). This is something I should be able to buy from B&Q or Wickes not limited to specialist suppliers where postage is 3x the item price in some cases.
#retrofit
#retrofit
October 27, 2025 at 10:17 AM
Wishing wood fibre insulation was as readily available in the UK as it was in France (this was at Brico Depot). This is something I should be able to buy from B&Q or Wickes not limited to specialist suppliers where postage is 3x the item price in some cases.
#retrofit
#retrofit
Reposted by Sean Hood
Just starting your self build journey? I recommend listening to this podcast first. Andy Mitchell from 21 Degrees outlines the challenges of finding a healthy, comfortable and energy-efficient home. And he explains it all in simple language!
www.houseplanninghelp.com/andymitchell
#SelfBuild
www.houseplanninghelp.com/andymitchell
#SelfBuild
October 7, 2025 at 10:20 AM
Just starting your self build journey? I recommend listening to this podcast first. Andy Mitchell from 21 Degrees outlines the challenges of finding a healthy, comfortable and energy-efficient home. And he explains it all in simple language!
www.houseplanninghelp.com/andymitchell
#SelfBuild
www.houseplanninghelp.com/andymitchell
#SelfBuild
Reposted by Sean Hood
"If it takes longer to make your coffee than it does for you build pipeline to complete, you're doing one of them wrong"
- @abangser.bsky.social
- @abangser.bsky.social
October 4, 2025 at 9:17 AM
"If it takes longer to make your coffee than it does for you build pipeline to complete, you're doing one of them wrong"
- @abangser.bsky.social
- @abangser.bsky.social
A good day to re-read this post: charity.wtf/2019/05/01/f...
Friday Deploy Freezes Are Exactly Like Murdering Puppies
VOICEOVER: “Previously, on twitter …” So, that happened. I hadn’t seen anyone say something like this in quite a while. I remember saying things like this myself as recentl…
charity.wtf
October 3, 2025 at 11:04 AM
A good day to re-read this post: charity.wtf/2019/05/01/f...
#passivehouse peeps, is the ~new "easyPH" compatible with #PHPP "Variants" worksheet? I see it's there but hidden, and I didn't see a mention in the manual.
Alternatively, is modeling in easyPH then exporting into the full variants sheet an option. NB: not being used for certification just fiddling
Alternatively, is modeling in easyPH then exporting into the full variants sheet an option. NB: not being used for certification just fiddling
September 15, 2025 at 3:49 PM
#passivehouse peeps, is the ~new "easyPH" compatible with #PHPP "Variants" worksheet? I see it's there but hidden, and I didn't see a mention in the manual.
Alternatively, is modeling in easyPH then exporting into the full variants sheet an option. NB: not being used for certification just fiddling
Alternatively, is modeling in easyPH then exporting into the full variants sheet an option. NB: not being used for certification just fiddling
PassiveHouse peeps, is the ~new "easyPH" comptatible with #PHPP "Variants" worksheet? I see it's there but hidden, and I didn't see a mention in the manual.
September 13, 2025 at 3:55 PM
PassiveHouse peeps, is the ~new "easyPH" comptatible with #PHPP "Variants" worksheet? I see it's there but hidden, and I didn't see a mention in the manual.
Spent an evening in Walkley at an SY Ecofit event. Chatting all things retrofit, insulation, moisture in buildings and also enjoyed this lovely curry.
#sheffield #retrofit
#sheffield #retrofit
September 9, 2025 at 9:49 PM
Spent an evening in Walkley at an SY Ecofit event. Chatting all things retrofit, insulation, moisture in buildings and also enjoyed this lovely curry.
#sheffield #retrofit
#sheffield #retrofit
