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
What microcontroller do they have? ESP32 or the nRF I've see your posts about?
I'm still not sold on Matter, but would be interested if it can run esphome.
This janky setup is still going strong though: bsky.app/profile/snhd...
I'm still not sold on Matter, but would be interested if it can run esphome.
This janky setup is still going strong though: bsky.app/profile/snhd...
November 22, 2025 at 11:28 AM
What microcontroller do they have? ESP32 or the nRF I've see your posts about?
I'm still not sold on Matter, but would be interested if it can run esphome.
This janky setup is still going strong though: bsky.app/profile/snhd...
I'm still not sold on Matter, but would be interested if it can run esphome.
This janky setup is still going strong though: bsky.app/profile/snhd...
Going to do some testing. Saved this chart for my boiler currently pump speed 2. Already very different from the first chart top of thread. Maybe due to outdoor temps in Jan?
Is there a calculation to translate heat loss at ODT to heat loss at a different temperature? i.e. 4.2kW @ -3.3 == nnkW @ 6c
Is there a calculation to translate heat loss at ODT to heat loss at a different temperature? i.e. 4.2kW @ -3.3 == nnkW @ 6c
September 22, 2025 at 7:43 AM
Going to do some testing. Saved this chart for my boiler currently pump speed 2. Already very different from the first chart top of thread. Maybe due to outdoor temps in Jan?
Is there a calculation to translate heat loss at ODT to heat loss at a different temperature? i.e. 4.2kW @ -3.3 == nnkW @ 6c
Is there a calculation to translate heat loss at ODT to heat loss at a different temperature? i.e. 4.2kW @ -3.3 == nnkW @ 6c
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
It took me a bit of time to get used to it. However not too dissimilar to the shock of driving on the M20 after coming back from France.
August 20, 2025 at 10:05 AM
It took me a bit of time to get used to it. However not too dissimilar to the shock of driving on the M20 after coming back from France.
Read this book at the weekend, would highly recommend to any homeowner, even if you aren’t planning a renovation. I especially liked this little illustration feat ASHP and solar panels.
#retrofit #renovation #mvhr #ashp #passivehouse
#retrofit #renovation #mvhr #ashp #passivehouse
August 19, 2025 at 3:59 PM
Read this book at the weekend, would highly recommend to any homeowner, even if you aren’t planning a renovation. I especially liked this little illustration feat ASHP and solar panels.
#retrofit #renovation #mvhr #ashp #passivehouse
#retrofit #renovation #mvhr #ashp #passivehouse
TIL my house has a built in summer storage heater.
Bay window is tiled and filled with single skin of brick. 33c at 11pm at night!
At the time of reading room temp was 26c and outside 21c.
Bay window is tiled and filled with single skin of brick. 33c at 11pm at night!
At the time of reading room temp was 26c and outside 21c.
July 11, 2025 at 11:02 AM
TIL my house has a built in summer storage heater.
Bay window is tiled and filled with single skin of brick. 33c at 11pm at night!
At the time of reading room temp was 26c and outside 21c.
Bay window is tiled and filled with single skin of brick. 33c at 11pm at night!
At the time of reading room temp was 26c and outside 21c.
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.
June 19, 2025 at 10:01 PM
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.
"Phase shift" was the phrase I was looking for.
And this was the outputs I have saved for both. Left 240mm woodfibre ~0.17W/(m²K). Right 130mm kingspan ~0.18W/(m²K). WF has much more density which it can then hold onto that heat, resulting in narrower temperature fluctuations is my understanding.
And this was the outputs I have saved for both. Left 240mm woodfibre ~0.17W/(m²K). Right 130mm kingspan ~0.18W/(m²K). WF has much more density which it can then hold onto that heat, resulting in narrower temperature fluctuations is my understanding.
June 13, 2025 at 1:06 PM
"Phase shift" was the phrase I was looking for.
And this was the outputs I have saved for both. Left 240mm woodfibre ~0.17W/(m²K). Right 130mm kingspan ~0.18W/(m²K). WF has much more density which it can then hold onto that heat, resulting in narrower temperature fluctuations is my understanding.
And this was the outputs I have saved for both. Left 240mm woodfibre ~0.17W/(m²K). Right 130mm kingspan ~0.18W/(m²K). WF has much more density which it can then hold onto that heat, resulting in narrower temperature fluctuations is my understanding.
My 3D printer feels like a waste of space half the time, but when you can go from “I have a problem” to “I have fixed that problem” in <30min it’s such a winner.
Anyway, plz rain soon!
Anyway, plz rain soon!
April 20, 2025 at 9:05 PM
My 3D printer feels like a waste of space half the time, but when you can go from “I have a problem” to “I have fixed that problem” in <30min it’s such a winner.
Anyway, plz rain soon!
Anyway, plz rain soon!
What better things are there to do on a bank holiday than a nice long ride. My 3rd metric century this year, I had only aimed to do 2.
Visited Caffe Velo Verde outside of Nottingham, then mostly hard pack gravel for a fair way back. Popped through Sherwood Pines which looks fun but not after 80km.
Visited Caffe Velo Verde outside of Nottingham, then mostly hard pack gravel for a fair way back. Popped through Sherwood Pines which looks fun but not after 80km.
April 20, 2025 at 9:04 PM
What better things are there to do on a bank holiday than a nice long ride. My 3rd metric century this year, I had only aimed to do 2.
Visited Caffe Velo Verde outside of Nottingham, then mostly hard pack gravel for a fair way back. Popped through Sherwood Pines which looks fun but not after 80km.
Visited Caffe Velo Verde outside of Nottingham, then mostly hard pack gravel for a fair way back. Popped through Sherwood Pines which looks fun but not after 80km.
128km of Flandrian countryside and several sectors of cobbled climbs and pavé. Completed it!
Only took photos with a disposable camera so gonna be a few days for those but here’s a nice map for now.
The answer is eating far more carbs than you think you can.
Only took photos with a disposable camera so gonna be a few days for those but here’s a nice map for now.
The answer is eating far more carbs than you think you can.
April 8, 2025 at 7:51 PM
128km of Flandrian countryside and several sectors of cobbled climbs and pavé. Completed it!
Only took photos with a disposable camera so gonna be a few days for those but here’s a nice map for now.
The answer is eating far more carbs than you think you can.
Only took photos with a disposable camera so gonna be a few days for those but here’s a nice map for now.
The answer is eating far more carbs than you think you can.
I was mostly there looking at getting Zinc guttering which is like 1/4 of the price in France compared to the UK. Then I saw they also did galvanised, also cheaper than UK.
April 8, 2025 at 6:12 PM
I was mostly there looking at getting Zinc guttering which is like 1/4 of the price in France compared to the UK. Then I saw they also did galvanised, also cheaper than UK.
In France in their version of B&Q, and they have this lovely lot in the entrance. Insulation with the build ups detailed, continuous ventilation, heat pumps and plug in solar. Quite a nice sight to see. They seem to have their heads screwed on.
April 8, 2025 at 1:34 PM
In France in their version of B&Q, and they have this lovely lot in the entrance. Insulation with the build ups detailed, continuous ventilation, heat pumps and plug in solar. Quite a nice sight to see. They seem to have their heads screwed on.
