Arostor quite noisy with ducting not going outdoors. Not cooling room too much with door to kitchen open so I think plan to duct it to include kitchen will work. Think noise should be ok if run mainly at night - can’t hear from bedrooms. If it’s too noisy I’ll duct it outside.
Not much done on house today but also, mercifully, not much left for me to do before moving in. Insulating this tap on outside to reduce heat loss through copper pipe. More to avoid condensation risk than because it’s a massive deal energy wise. Already done similar on inside (second pic) which seemed to have worked in last cold snap.
Tested out the shower. 6l/min but looks great flow, wait time for hot ~4s!
External wind tightness to incoming electrics duct today.
Plus birthday prep!

Update on shower. Just ran it into a bucket for a minute. It’s more like 9l/min so I’m guessing the plumber hasn’t fitted the flow restrictors yet, or they aren’t working. Will quiz them when they’re back in.

I thought it looked surprisingly powerful for 6l/min!

Reassured by space with table back in. We lost 100mm on external walls for insulation and service cavity, but we also lost a radiator so probably gained a bit of space overall.
Beautiful freezing cold morning on Monday. Ice on outside of windows, 16/17° inside off of only 4h of minisplit heating.

Some more thoughts/tests on 10mm (15mm for bath) radial hot water distribution:

- plumber reckoned my mains pressure was ~2.7 bar (if pressure is too low this system won’t work)
- multiple taps: 1 open to 2 open no noticeable difference. Open a 3rd & 1 drops a bit. No biggie
- flow reducers for showers not added yet, on order
- not timed bath fill yet, will do when have a plug!
- plumber reckoned it was a bit more work, but not loads

Decorators finished upstairs so I spent yesterday evening tidying up ready for moving the beds in. Looking great!
Bureau we picked up for £30 from local second hand furniture shop. Should work well in this space.
Hoping to repurpose one of these old worktops (from kitchen pre-retrofit) as a built-in desk for home office. Will need a good sand and oil!
Light shades going on. No particular logic to order I’m doing stuff here, just the order it comes out of container!
Old Ikea bed rebuilt.

First bit of loft storage in use. This lot took up loads of floor space, but not much height, in the container, taking up hardly any room in loft.

Distant photo is looking at half the loft. Excited about having a decent amount of dry, warm, ventilated storage space.

Old bed rebuilt. Time for bed (unfortunately not here, yet).
Reused (from my daughter’s room pre-retrofit) but not very old carpet went on the stairs today. Looking good as new, less noisy and a lot less work than tidying up the old stairs!
Daughter’s bed; broken slats reinforced with spare bits of ply then bed rebuilt. Gonna need some padding on the wall at the bottom of the slide! 🤣
Rebuilding this bed makes me realise how much room rebuilding the first floor (from 1.5 to 1.75 storeys) has won us. Bed+slide used to fill the room both ways. Now there’s ~1.4m between head of bed and window.
Been desk building, bed building and window cleaning today. Here are some views from upstairs. Tree from bathroom and view through bedroom window from hallway.
Views from bed for me and my wife.

Views from bed for my kids.

Hadn’t really appreciated how good having no glazing bars m/transoms/mullions was for the view until I cleaned the glass. Your brain doesn’t see the glass at all, you just see the view. 👌

Today is air test day! Place your bets below.

For context EnerPHit requires the air change rate at 50 pascals to be =<1.0, Passivhaus new build is =<0.6 and the best I’m aware of in the UK is 0.044. Retrofit harder than new build so not expecting to get anywhere near that.

Average of the two a provisional result of 0.46 air changes per hour. Pretty happy with that!

We’ve been in for a week now. I’ll update soon, been too busy moving in & getting cabin ready for guests so far.

It’s amazing. Eg; today was 🥶, 🌬️ & with only a few hr ☀️. Heating off mid morning, hasn’t been back on. It’s still 20° inside. Oh, and MVHR is amazing. #Passivhaus

800 W of avoided heating for 25 W of fan energy use, plus excellent air quality and quick drying towels. Brilliant. Silent (I can’t hear it even if I stand on bed to be closer to valve) in bedrooms, just audible in bathrooms.
I’m looking forward to not having a monumental house project to do next winter, and waking up early to this view from breakfast through externally frosted windows, followed by more days like this. North east buttress on Ben Nevis as a last (and first!) winter route of the season.

Been neglecting this thread a bit and forgetting to update it when I update the mirrored one on Twitter. Some of the next few are a bit old, apologies.

Finished up turning old porch worktop into home office desk. Pleased with how this has turned out, it was pretty manky before I started with the sander. Wide enough for me and wife to use together, so long as I stay tidy 🤪! Got some more old worktops to do same in utility.

One of the things I think I did least well on this project was reusing stuff (slates, internal doors, kitchen cupboards). I wasn’t prepared for the amount of storage needed to make reuse feasible, or time cost versus chuck and buy new.

Managed it on a bath, some basins and a toilet, all of which could be stored in the garden then cleaned up before reinstalling, plus these worktops.

We hung a picture! Still a lot of moving in to do but we’re getting there.

We’ve been back in our #Passivhaus #EnerPHit* for a month now. How’s it been? A short sub-thread on performance and things I’ve noticed.

*not certified yet so strictly speaking I shouldn’t call it this. We will certify in due course, all being well.

1/10

First of all the things I was expecting: exceptional comfort throughout the house for a tiny amount of heat input during cold weather. Similar in warm weather with heat recovery bypass and opening a window or two when needed.

Laundry drys really quickly, air always fresh.

2/10

What about some things I wasn’t expecting, and potentially some energy benefits of Passivhaus not normally considered?

3/10

Towels dry really quickly with no direct heat input (just hung over a rail). I was actually worried about towel drying, as we have no radiators or heated towel rails. Needn’t have worried; shower at 11pm, dry by morning. Just by the magic of comfortable temperatures & MVHR.

4/10

This is lovely, but it also means towels don’t get musty and smelly. I used to regularly wash towels at 60° to counteract this. Suspect we’ll be able to wash towels less often, at 30°, and them still be lovely and fresh. Less energy used, less drudgery for me and my wife.

5/10

I love mountains🏔️, climbing them, running or skiing up & down them, sleeping under stars and waking up to frost on my sleeping bag. So I’ve a fair bit of expensive insulated kit. A few days in the house it was really noticeable how much fluffier this kit was in drier air.

6/10

So I suspect that kit will last longer and perform better on the hill than in the old house. Also, I won’t be wearing it in the house to stay warm, which wears super lightweight expensive kit out frighteningly fast.

7/10

Back to laundry. With a good set up laundry dries quickly, so no need to buy or run a tumble drier or dehumidifier.

Where we live in #Lochaber the climate is very wet; most houses have a tumble drier, a dehumidifier, or mould. Many have all three!

8/10

Not sure about this one, but I think the moderate humidity in the house will mean the freezer ices up less quickly, so it runs more efficiently and needs fewer annoying defrosts.

9/10

@EsTresidder Interesting point, never thought of that one before.
@edavies as I say, I’m not sure it’s true. I think so though.