High-energy mountain sports, low-energy building design. Runner, climber, ski-mountaineer, building physicist & Passivhaus designer. EV driver. Currently finishing up my own EnerPHit house project. https://bsky.app/profile/estresidder.bsky.socialhttps://bsky.app/profile/estresidder.bsky.social/post/3mpqyqxxtak2tBeen off social media for a while for various reasons. Hoping to be able to engage a bit more from now on. Here’s a blog I wrote about two recent site visits: https://www.highlandpassive.com/how-big-is-your-performance-gap/03 Jul 2026 16:47 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3mpqyqxxtak2thttps://bsky.app/profile/estresidder.bsky.social/post/3lnd3rvuhmc2uHad nearly decided on an MG5 as our new car, but just learnt it doesn’t have a heat pump. Some models do have heated seats though. Interested to hear folks experience of this EV or others without heat pumps to get a picture of how much more of an impact on range that makes in winter. Thanks 🙏21 Apr 2025 11:47 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3lnd3rvuhmc2uhttps://bsky.app/profile/estresidder.bsky.social/post/3ljg57a4wvk23This is excellent from @richardlowes.bsky.social. Absolutely agree that super deep retrofit isn’t always appropriate, but one thing I’d say here is that the heat demand reductions mentioned here as the top end of what can be achieved (40-50%) are lower than what can be achieved at the top end. [contains quote post or other embedded content]02 Mar 2025 19:10 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3ljg57a4wvk23https://bsky.app/profile/estresidder.bsky.social/post/3lglwbq4g4c2aHow did storm Eowyn impact the heat demand in our #EnerPhit retrofit? Looks like hardly at all! Gale force 💨 yesterday, calm today. ⚡️demand for heat a bit higher today (colder). Suggests impact of even gale force 💨 is small/negligible due to good wind-tightness & excellent airtightness. #Passivhaus25 Jan 2025 22:06 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3lglwbq4g4c2ahttps://bsky.app/profile/estresidder.bsky.social/post/3lgff7t7l222fUseful podcast here on some things that can go very wrong with MVHR. I like to think of MVHR as a bit like pneumatic tyres on a bike. Installed properly and maintained they are *way* better than solid tyres, but if you don’t maintain them they are even worse (try riding a bike with a flat tyre). [contains quote post or other embedded content]23 Jan 2025 07:45 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3lgff7t7l222fhttps://bsky.app/profile/estresidder.bsky.social/post/3lfryozq7zc2cHi @evanhd.bsky.social, I tried to send an email to the email address provided at the end of the flats podcast but got an address not found failure. Could you let me know the email address please? Thanks!🙏15 Jan 2025 14:40 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3lfryozq7zc2chttps://bsky.app/profile/estresidder.bsky.social/post/3ldszjidlzk2hRight, side project for the Christmas season is to source a new (second hand) #EV. Current thinking is an MG5. Needs to be able to take a tow bar for a bike rack. I think the more recent ones can, is there a year that doesn’t that I shouldn’t go further back than? #electricCars #EVs21 Dec 2024 13:37 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3ldszjidlzk2hhttps://bsky.app/profile/estresidder.bsky.social/post/3lbmt57drxc2aWe've got a full year of monitoring for heating & hot water in our #Passivhaus EnerPHit retrofit. Our total electricity usage, for heating and hot water, between 14th November 2023 and 14th November 2024 was just £175!23 Nov 2024 15:37 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3lbmt57drxc2ahttps://bsky.app/profile/estresidder.bsky.social/post/3l6vfxa2erk2jStop Building Crap Houses A quick thread 🧵 about the Scottish government consultation on the proposed #ScottishPassivhausEquivalent standard. #passivhaus19 Oct 2024 21:19 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3l6vfxa2erk2jhttps://bsky.app/profile/estresidder.bsky.social/post/3l4m2m6zyit2uLanguage matters, and to communicate Passivhaus well we have to be mindful of cognitive biases. One example I’ve been musing on recently: To a layperson ‘natural ventilation’ sounds intrinsically better than ‘mechanical ventilation with heat recovery (MVHR) plus airtightness’.20 Sep 2024 17:12 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3l4m2m6zyit2uhttps://bsky.app/profile/estresidder.bsky.social/post/3l2riiaje322rJust off the phone with someone whose 'forever home' in NW Scotland, built in 2016, is unbearably hot whenever the sun shines and unheatable whenever the wind blows. Now considering major retrofit works. Grim. Designers, please start taking thermal comfort seriously. Passivhaus for the win!28 Aug 2024 10:13 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3l2riiaje322rhttps://bsky.app/profile/estresidder.bsky.social/post/3l2oqp2uo5b27Proper humid in Lochaber today.27 Aug 2024 08:02 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3l2oqp2uo5b27https://bsky.app/profile/estresidder.bsky.social/post/3l2gyl2sxvf2mOn the way back from an excellent cycling trip to Orkney, we saw these massive wind turbine blades. Does anyone know why they have sharp teeth on the trailing edge? The kids thought it might be to stop Danny Macaskill riding along them, I thought maybe something about aerodynamics.24 Aug 2024 06:02 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3l2gyl2sxvf2mhttps://bsky.app/profile/estresidder.bsky.social/post/3kv2q7jr4it2eI interviewed Finlay Wild about his amazing recent record run of the Cuillin round on Skye, a place close to my heart. Finlay took a third off the existing record for this monster run. #running #fellrunning #trailrunning #climbing https://podcasters.spotify.com/pod/show/go-mountain-goats/episodes/Episode-36---Cuillin-Round-Record-with-Finlay-Wild--interviewed-by-Es-Tresidder-e2kuhmp16 Jun 2024 17:54 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kv2q7jr4it2ehttps://bsky.app/profile/estresidder.bsky.social/post/3kn2bt6kulc2tToday’s the 1st day since start of ❄️ that the #MVHR bypass has opened (cos the house was already above 21° due to the plentiful ☀️). So cool how in most weather from now till next winter it’ll just modulate how open the bypass is and effortlessly keep the 🏠 between 20 and 22°.06 Mar 2024 18:15 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kn2bt6kulc2thttps://bsky.app/profile/estresidder.bsky.social/post/3kmahuonapk2xNew filter day. White ones are replacements. Darkest is outdoor air filter. 4 months of highland winter air. Change your filters regularly people! Also dusted extract terminals to keep everything running silently. #MVHR #Passivhaus25 Feb 2024 11:54 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kmahuonapk2xhttps://bsky.app/profile/estresidder.bsky.social/post/3kmahtbkomc2dEscaped into the hills with my two eldest yesterday. Stob Ban north ridge. Magic.25 Feb 2024 11:53 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kmahtbkomc2dhttps://bsky.app/profile/estresidder.bsky.social/post/3klm4utxjhi2jJust finished this book about a man forging a life in the wilds near where I live. Really enjoyed it. Highly recommend!17 Feb 2024 09:44 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3klm4utxjhi2jhttps://bsky.app/profile/estresidder.bsky.social/post/3klm24herup2kNo heating on for 24h and a chunk of heat put into the hot 🚿 (our HW heat pump takes heat from inside) but the 🏠 is still nearly 20°C. Still surprises me after 10months in the house. #Passivhaus. *electricians were in doing some snagging and I forgot to turn heating back on.17 Feb 2024 08:55 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3klm24herup2khttps://bsky.app/profile/estresidder.bsky.social/post/3kkvpop3vcs24Was a pleasure and honour to be a guest on the excellent Energy Transition Show, after years of listening, to discuss radical building energy efficiency and why we should be excited about its role in the #EnergyTransition. #Passivhaus #Passivehouse #Energy #Renewables https://xenetwork.org/ets/episodes/episode-217-passivhaus-in-scotland/08 Feb 2024 11:50 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kkvpop3vcs24https://bsky.app/profile/estresidder.bsky.social/post/3kjtc2uzpf22eSurvey of a timber frame house, built in 2000, for a potential retrofit today. Wild that houses were being built in the 21st century with essentially no insulation in the floor! 😳 this is 2mm of foil bubble wrap.25 Jan 2024 19:15 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kjtc2uzpf22ehttps://bsky.app/profile/estresidder.bsky.social/post/3kjidfrhxaq2uBit of morning data crunching. Just £87.58 of electricity used for heating and hot water between 15 Nov and today, including several very cold spells. Most expensive single day was a little over £3! 4 bedroom house, exemplary comfort 24/7 💥 💪 #Passivhaus #Heatpumps21 Jan 2024 10:40 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kjidfrhxaq2uhttps://bsky.app/profile/estresidder.bsky.social/post/3kjfx4jxt6p2fAffectionate cat and cosy window seat currently derailing plans to tidy house after a week of snowmageddon. Adult and kids winter kit everywhere. 🎿 🧣 🧤 🧥20 Jan 2024 11:55 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kjfx4jxt6p2fhttps://bsky.app/profile/estresidder.bsky.social/post/3kinkry4voe2xAt very low loads our air to air does 5min cycles at 4-500W. Slightly higher load and it goes to steady 200 W. Presumably it’s more efficient at steady than cycling, so why doesn’t it do longer cycles at 200 W instead of jumping straight from off to 500 W?10 Jan 2024 19:10 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kinkry4voe2xhttps://bsky.app/profile/estresidder.bsky.social/post/3keianhcf5c23Very excited to have electricity monitoring for the air to air minisplit heating up and running for our Passivhaus EnerPHit Retrofit! emoncms.org/app/view?name=… https://emoncms.org/app/view?name=…18 Nov 2023 18:45 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3keianhcf5c23https://bsky.app/profile/estresidder.bsky.social/post/3kdz6b3jqqu2cBeautiful morning here today after a very cold night. First time I’ve seen frost protection activated on the MVHR. Love this time of year.12 Nov 2023 18:52 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kdz6b3jqqu2chttps://bsky.app/profile/estresidder.bsky.social/post/3kd2wbjilj62uIn 🏴󠁧󠁢󠁳󠁣󠁴󠁿 there is a £1250 grant and a £4750 interest free loan for solar PV, with the same again available for home battery systems. Great. Requires that you fit a heat pump first. Also great. Turns out heat pump installation needs to be by someone MCS accredited. Less great.31 Oct 2023 18:09 +0000at://did:plc:gl45rbuynx4padperpxec7yk/app.bsky.feed.post/3kd2wbjilj62u