Keith Alexander
@keithalexander.bsky.social
Interested in climate & the environment
Reposted by Keith Alexander
Can't wait for the loosened up, non-perfect, but quickly shipped AI-enhanced updates to hit my banking and insurance services next year.
Im sure there will be no issues there at all.
Im sure there will be no issues there at all.
December 26, 2025 at 2:28 PM
Can't wait for the loosened up, non-perfect, but quickly shipped AI-enhanced updates to hit my banking and insurance services next year.
Im sure there will be no issues there at all.
Im sure there will be no issues there at all.
Earlier I came across a webpage that had an em-dash sentence then “This guide is both optimised for search engines, and readable for real humans looking for information on this topic.”
December 24, 2025 at 10:40 AM
Earlier I came across a webpage that had an em-dash sentence then “This guide is both optimised for search engines, and readable for real humans looking for information on this topic.”
More and more of the web pages and videos I (and presumably you?) come across are AI slop. Think of all the resources and money and hype that went into giving us a markedly worse online experience.
December 23, 2025 at 11:58 PM
More and more of the web pages and videos I (and presumably you?) come across are AI slop. Think of all the resources and money and hype that went into giving us a markedly worse online experience.
The advice I’ve wanted since getting my thermal imaging camera youtu.be/8-pxHW2e34c?...
Why Are Homeowners Misdiagnosing Heat Loss With Thermal Cameras?
YouTube video by Renewable Heating Hub
youtu.be
December 17, 2025 at 3:53 PM
The advice I’ve wanted since getting my thermal imaging camera youtu.be/8-pxHW2e34c?...
Reposted by Keith Alexander
Did you know that from tomorrow, Qualtrics is offering synthetic panels (AI-generated participants)?
Follow me down a rabbit hole I'm calling "doing science is tough and I'm so busy, can't we just make up participants?"
Follow me down a rabbit hole I'm calling "doing science is tough and I'm so busy, can't we just make up participants?"
December 16, 2025 at 5:38 PM
Did you know that from tomorrow, Qualtrics is offering synthetic panels (AI-generated participants)?
Follow me down a rabbit hole I'm calling "doing science is tough and I'm so busy, can't we just make up participants?"
Follow me down a rabbit hole I'm calling "doing science is tough and I'm so busy, can't we just make up participants?"
This week it's dropped down to (it says) 5.2 with the colder weather...
December 17, 2025 at 1:50 PM
This week it's dropped down to (it says) 5.2 with the colder weather...
The rafters are 125mm deep, so this was going to be ~75mm to leave ~50mm ventilation, but since the roof was redone with a breather membrane, I might be able to reduce the ventilation gap (but not sure of the chapter and verse on that).
December 17, 2025 at 1:46 PM
The rafters are 125mm deep, so this was going to be ~75mm to leave ~50mm ventilation, but since the roof was redone with a breather membrane, I might be able to reduce the ventilation gap (but not sure of the chapter and verse on that).
Sort of, only instead of a sloping ceiling in the room, there is a full height wall with attic behind it. There is a relative weak spot where the edge of the ceiling meets the rafters and the insulation has to drop to what can fit between the rafters.
December 17, 2025 at 1:46 PM
Sort of, only instead of a sloping ceiling in the room, there is a full height wall with attic behind it. There is a relative weak spot where the edge of the ceiling meets the rafters and the insulation has to drop to what can fit between the rafters.
Ideally I’d just extend the thermal envelope into the attic and not insulate it from the house. But I can insulate the attic wall far better than I can the attic rafters.
December 16, 2025 at 5:48 PM
Ideally I’d just extend the thermal envelope into the attic and not insulate it from the house. But I can insulate the attic wall far better than I can the attic rafters.
I’m currently thinking the long term plan is to continue insulating the attic walls to a good level (insulating the house from the attic), and at least draught proof the door a bit better, but then create an airtight and (more lightly) insulated cupboard space within the attic. Maybe.
December 16, 2025 at 5:45 PM
I’m currently thinking the long term plan is to continue insulating the attic walls to a good level (insulating the house from the attic), and at least draught proof the door a bit better, but then create an airtight and (more lightly) insulated cupboard space within the attic. Maybe.
I’ve got a walk-in attic space like this that needs more work. An interior door to a cold attic space is not great, though it’s far from my house’s (or even my attic’s) biggest flaw at the moment.
youtube.com/shorts/Ig8Qr...
youtube.com/shorts/Ig8Qr...
GO IN YOUR ATTIC! So Much to see and do for Home Performance: Airsealing, Insulation, HVAC, & IAQ
YouTube video by Home Performance
youtube.com
December 16, 2025 at 5:40 PM
I’ve got a walk-in attic space like this that needs more work. An interior door to a cold attic space is not great, though it’s far from my house’s (or even my attic’s) biggest flaw at the moment.
youtube.com/shorts/Ig8Qr...
youtube.com/shorts/Ig8Qr...
Leave the doors and windows open whenever it’s mild enough for a COP 6, go on holiday when it’s -3°C.
December 14, 2025 at 11:39 AM
Leave the doors and windows open whenever it’s mild enough for a COP 6, go on holiday when it’s -3°C.
Reposted by Keith Alexander
Very sad that I felt I had no choice but to resign from The Infinite Monkey Cage - a victory for the transphobes and other bigots - I did it because so much of the media has chosen to believe the kind and empathetic people are a fiction - they are real and so often unrepresented.
December 13, 2025 at 12:02 AM
Very sad that I felt I had no choice but to resign from The Infinite Monkey Cage - a victory for the transphobes and other bigots - I did it because so much of the media has chosen to believe the kind and empathetic people are a fiction - they are real and so often unrepresented.
Wow almost 300m2 and a heat loss of only 5kw?! That must’ve been some retrofit!
December 13, 2025 at 9:00 AM
Wow almost 300m2 and a heat loss of only 5kw?! That must’ve been some retrofit!
Heating has been on ~3 months now, mainly mild days, (>5°C) and a bunch of mildish days of front door being open a lot with heating on (kitchen renovations, moving in etc), which is probably favourable to the working figure, but still seems very high.
December 13, 2025 at 7:40 AM
Heating has been on ~3 months now, mainly mild days, (>5°C) and a bunch of mildish days of front door being open a lot with heating on (kitchen renovations, moving in etc), which is probably favourable to the working figure, but still seems very high.
They also said manufacturers might not include eg circulation pumps in their measurement of electricity demand.
December 12, 2025 at 12:22 PM
They also said manufacturers might not include eg circulation pumps in their measurement of electricity demand.
podcasts.apple.com/gb/podcast/b...
@trystanlea.bsky.social and @glynhudson.bsky.social make some interesting points here that HP makers probably use sensors that are good enough to run the heatpump but not as accurate as their sensors spec’d to provide measurements.
@trystanlea.bsky.social and @glynhudson.bsky.social make some interesting points here that HP makers probably use sensors that are good enough to run the heatpump but not as accurate as their sensors spec’d to provide measurements.
Look at the Best Performing Heat Pump Systems in Real Time
Podcast Episode · BetaTalk - The Renewable Energy and Low Carbon Heating Podcast · 09/11/2023 · 58m
podcasts.apple.com
December 12, 2025 at 12:12 PM
podcasts.apple.com/gb/podcast/b...
@trystanlea.bsky.social and @glynhudson.bsky.social make some interesting points here that HP makers probably use sensors that are good enough to run the heatpump but not as accurate as their sensors spec’d to provide measurements.
@trystanlea.bsky.social and @glynhudson.bsky.social make some interesting points here that HP makers probably use sensors that are good enough to run the heatpump but not as accurate as their sensors spec’d to provide measurements.
The 7kw vaillant heatpump at my old house averaged a (self reported) SCOP well above 4, which I thought was pretty good. But this one (a bigger 10 kw model) is reporting a running average of 6 so far! (We’ve only been heating with it 2-3 months, but I’m still impressed/skeptical).
December 12, 2025 at 12:09 PM
The 7kw vaillant heatpump at my old house averaged a (self reported) SCOP well above 4, which I thought was pretty good. But this one (a bigger 10 kw model) is reporting a running average of 6 so far! (We’ve only been heating with it 2-3 months, but I’m still impressed/skeptical).
Reposted by Keith Alexander
HEY FRIENDS!! Did you know that Australia - #2 in the world for data centre investment - is now formally missing its climate targets thanks in large part to the resulting surge in power demand?
It's massive news - @crikey.com.au let me NERD OUT to explain why:
www.crikey.com.au/2025/12/04/d...
It's massive news - @crikey.com.au let me NERD OUT to explain why:
www.crikey.com.au/2025/12/04/d...
December 4, 2025 at 11:19 PM
HEY FRIENDS!! Did you know that Australia - #2 in the world for data centre investment - is now formally missing its climate targets thanks in large part to the resulting surge in power demand?
It's massive news - @crikey.com.au let me NERD OUT to explain why:
www.crikey.com.au/2025/12/04/d...
It's massive news - @crikey.com.au let me NERD OUT to explain why:
www.crikey.com.au/2025/12/04/d...
I’ve read of (experimental?) retrofits where they’ve pumped the solum full of EPS beads and closed off the air bricks.
I guess it’s usually not good to extend conditioned space with timber below the DPC.
I guess it’s usually not good to extend conditioned space with timber below the DPC.
December 6, 2025 at 10:49 PM
I’ve read of (experimental?) retrofits where they’ve pumped the solum full of EPS beads and closed off the air bricks.
I guess it’s usually not good to extend conditioned space with timber below the DPC.
I guess it’s usually not good to extend conditioned space with timber below the DPC.
and track the changes to heat loss and humidity as I go.
December 6, 2025 at 9:30 PM
and track the changes to heat loss and humidity as I go.
Definitely. The floor doesn’t feel all that cold at these temperatures, but the draughts make the room feel a bit uncomfortable. What I’d like to do next is seal the rest of the ground floor from beneath with a VCL membrane before adding insulation, hopefully over this winter,
December 6, 2025 at 9:30 PM
Definitely. The floor doesn’t feel all that cold at these temperatures, but the draughts make the room feel a bit uncomfortable. What I’d like to do next is seal the rest of the ground floor from beneath with a VCL membrane before adding insulation, hopefully over this winter,
Very neat. I added tongue and groove woodfibre boards underneath the joists instead of the breather membrane, but it was pretty tricky and very time consuming, especially around pipework, and I probably wouldn’t do it exactly like that again.
December 6, 2025 at 9:13 PM
Very neat. I added tongue and groove woodfibre boards underneath the joists instead of the breather membrane, but it was pretty tricky and very time consuming, especially around pipework, and I probably wouldn’t do it exactly like that again.
The kitchen floor insulation was definitely high effort, but even in this relatively mild weather (outside temperature 6-7°C, thermostat temperature 18.5°C) it’s keeping the floor 3.5°C warmer than the uninsulated dining room floor. #retrofit
December 6, 2025 at 11:57 AM
The kitchen floor insulation was definitely high effort, but even in this relatively mild weather (outside temperature 6-7°C, thermostat temperature 18.5°C) it’s keeping the floor 3.5°C warmer than the uninsulated dining room floor. #retrofit