When we bough the house three years ago we knew that the windows needed replacing. They were old Everest aluminium framed double glazed units. They had many problems: the metal frames conducted heat like mad and had deformed over the years, several of the units had blown and none of the glass was modern Low-E.
New windows are expensive however you look at it. I looked at quotes from Internorm and The Green Building Store for modern triple glazed units, using modern glass, spacers and cavity gas. For high performance "A" rated windows it's between £20 - 30 thousand, fully installed.
Even assuming high gas inflation of 10% (which is plausible) our house doesn't lose enough heat through the windows to break even until over 35 years and assuming 35% heat loss through the windows - which is more than it really is. Basically expensive windows will not pay for themselves on gas prices alone.
If you have the money required to buy the windows in the bank at the moment, and just sat on it, it would gradually devalue over time as bank interest is consistently less than inflation. If you factor in a 2% difference between interest and inflation against you, then overtime you lose a lot of money in a bank savings account. If you add this to the cost of domestic gas for heating then the break-even point is now at more realistic heat loss through the windows percentage and/or date.
It's still not a really strong economic argument for new triple glazed windows, but as the ones that came with the house when we bought it had failed, this summer we decided to buy UK made Green Building Store Ecoplus 3 windows. By making the windows simpler than the original ones we were able to save several thousand pounds on the quote and bring the price closer to 20k than 30k.
After our holidays they came and ripped the old windows out and put the new ones in. They look an awful lot nicer than the original ones and let in considerably more light. We're now in the process of making good the mess that was made getting the old windows out and the new ones in. This winter I think we will have gone from some of the worst windows and doors in the village to the best.
This morning we woke with a heavy heart - we are going home and back to work. We cycled through a sleepy town to the port and boarded our ship home. We didn't arrive that early for boarding but they must have been running slow as we were still able to board quickly before most of the cars and got a nice seat on the rear deck to watch the world go by. Other than a few annoying smokers who don't realise they stink, we had a pretty warm sunny morning sitting on deck until lunch time. We went to the cafe for provisions and then looked at the on-board shops before returning outside to sit in the sun.
Overall the crossing was pretty impressive as with previous years, lots of sun shine and no unpleasant events until we arrived in the UK and were were delayed unloading by over an hour. We cycled from the ferry terminal to the train station over the utterly atrocious roads and terrible cycle provision in Portsmouth and boarded our train home.
Because we were an hour later than planned, it was pitch black and we had a very uncomfortable cycle home in the dark. Thankfully my new Topeak lights work very well even though they are really only designed to be seen not to see with.
Today we had the full day in the city of Nantes. We walked down to the tram stop and then took the tram through the city to meet up with family. Our plan for the day was to visit Les Machines de I'ile. While the exhibition was open the elephant and various bits were closed to maintenance so we could only take the limited tour.
When the shipyards in Nantes closed, they set-up the most insane model shop you have ever seen to keep skilled engineering jobs in the city. They have built a massive walking elephant that can take 50 people on a guided tour of the island, a enormous aquatic themed triple decked merry-go-round and at the moment they are in the process of building a gigantic fifty metre diameter "Heron Tree".
The whole place is full of the most over the top and fanciful, science-fiction come steam-punk contraptions I've ever seen. It's hard to describe the place, but even though we couldn't see everything I was utterly blown away with the place and I want to go back to Nantes just to ride on the elephant!
After the tour we went into the very tasteful gift shop then had lunch at the very nice cafe that is attached. Once that had all settled we had a wander in the stunning afternoon sun, first round the island it's self then back to the city centre. We looked in at the Castle and went past the school (sixth form equivalent) that my better half went to and into the adjoining botanic gardens. The gardens were pretty enough but they were also full of the most fun and zany art/flower displays I've ever seen.
Tonight we are having dinner at one of the towns more famous restaurants - should make up for last night's terrible food, the only time I've had a bad meal in Brittany!
The city's beautiful botanic gardens are full of the most wild installations you've ever seen. On our last day we decide to go back to have a look at the ones we missed yesterday. Each one is accompanied with the most absurd description. They were created by Claude Ponti and have been there all year. When we saw the first one yesterday we didn't understand what was going on, but once we saw a few more we realised it was a joke - on a huge scale...!
Our train trip was pretty uneventful, though I still hate the stupid hanging bike things that SNCF insist on having installed on their trains.
On reaching Saint Malo in the early afternoon, we checked into our B&B Hotel and then went shopping. Carrying everything by bike means we got very little, as it has to fit on the bike - which is good for self-restraint!
This evening we'll go into old city to buy our last crepe...
We left our gite early in the morning and cycled back to town. We nipped into the church in the town to have a look, it was rebuilt after the war and though tiny has stunning windows in the most amazing colours.
We cycled along the canal for a short while until we arrived at Blain where we met our family for lunch. After lunch we went though town to find a shop to buy dinner (we're at another gite tonight) then we returned to the canal.
We left the gite at wonderfully home made sign that said "gite d'etapes 2 km ->". We followed it for about 50 metres and then it said "gite d'etapes 1.5 km ->". We then followed some increasingly rougher and uncomfortable tracks until we arrived at the farm where the gite d'etapes is. The farmer showed us round and we settled in. The place is very pretty even if the signs to get there are a bit random...
To our amazement while waiting for the water to boil for my cup of tea I noticed a box of Mille Bornes in the gite which as a coincidence as my better half had being saying during the ride that it was her favourite game from her childhood. I've been counting the kilometre stones off as we've been cycling along so it reminded her of the game. We had to play the game, even though she couldn't remember the rules and we the box didn't have any!
In the morning we left the farm via a different route and rejoined the canal. We met our family for lunch and then reached the end of the canal at lock 2 where is joins the River Erdre.
The river here is deep and wide and never had much of a tow path, most boats put sails on and sailed down the last few kilometres to Nantes. So we had to leave the canal and take a detour in land before we rejoined a river side path through the city of Nantes.
We cycled all the way to Lock Number 1, which holds the river level up in the city and beyond the lock you are into the tidal part of the river.
Once we really made it the end we went back through the centre of the city to our bike friendly B&B to crash out before going for dinner with our family. Nantes is a fantastic city, very vibrant and very bike friendly. Nantes is currently in the process of remodelling it's self from a car centric city to one that favours people on foot or bikes. It's a great place to get round on foot or bike and surprisingly quiet as traffic noise is minimised.
Today we took a day of cycling and had a day with the family. In the morning we went into town, looked round the market and did shopping things. Once that was done we went to to the village of La Gacilly where there is an annual outdoor photo exhibition. This year is their tenth anniversary so it was extra special, with loads of extra pictures and events.
The exhibition was pretty impressive - some of the pictures were absolutely stunning and more will appear on Picasaweb once I've processed them. The village is pretty enough to start with but with giant photos everywhere it is even better!
After looking round the village we went for lunch in a very busy restaurant - they were turning people away it was so busy. The food looked a bit fancy on the menu but was very good and we enjoyed it.
After lunch we went into the shop of Benjamin Rousset who makes decorative things from old cutlery. There was all sorts of things in his shop from clocks, lamp shades to candle stick holders and fashion jewellry. We got my better half a nice bracelet made form two old spoons!
After returning to our B&B we had a walk from it down to the river and picked some blackberries from the very resplendent brambles growing in the hedge in the lane to the B&B.
After another night in a real bed we had short stage today. We went into Redon for the morning market and lunch, then left our family as we cycled along the canal to Guenrouet where we were staying at another gite d'etapes.
The canal is quite different here, it's flowing across flat mash as opposed to cutting though granite hills. The problem here wasn't cutting the rock, rather containing the river level as it soaks out evenly into the marshes.
In the morning we left our rather fancy - but bike friendly - B&B and threaded our way through the mediaeval streets of Pontivy to rejoin the canal. We had a short stage today, having a long lunch at Rohan before arriving early in the afternoon at Josselin, home of another big Rohan family castle. As the Gite d'etape wasn't open we had to push out bikes about in the town, so we took advantage of the delay to nip up to the supermarket to buy more provisions.
Behind the church there is the Town Hall and when we went past they were setting something up. The church tower is free to visit and from the top you can get a stunning view of the town, that picture and others will soon be found on my Picasaweb pages.
While waiting for my better half to go up the church tower an elderly British lady walked past, and without any understanding, was most annoyed that the Town Hall had the French, German, Italian and some other flag on it and was disgusted that it didn't have British flag on it. Sadly she failed to identify the Breton Flag which is everywhere in Brittany and on just about everything in a tourist shop, mixed up the Hungarian flag with the Italian one and didn't notice that the town is twined with one in Germany and Hungary and that today was the anniversary of the twinning (it was even in shop windows) and that there was a reception in the square that evening...
Eventually the gite opened and we were able to unload and lock our bikes up inside, then return to the town without our bikes.
The town is dominated by Rohan Castle which is built on an outcrop with the river/canal at the foot. The bulk of the town is a picture-post-card of half-timbered houses of all shapes and sizes!
After walking round for a while we decided to gate crash the reception at the town hall and listen to the local Breton Pipe band and see if we could get some free nibbles... They were rightly very happy and celebrating a transcontinental bike ride various people had undertaken. It was a strange mix of town hall staff/civil servants and hard-core bikers... Tonight will be humble fare in the gite - assuming the cooker works (it didn't look impressive when we arrived...)
Our night in Josselin wasn't the best night we've had. The gite had an odd smell, there was some machinery behind it that made an noise all night and I was got at by a mosquito... We left Josselin and cycled on, meeting family at Malestroit for lunch - galette and crepe off course!
In the afternoon we carried on to Redon where we are to spend the night at a gite/B&B. So that means a real bed and we don't have t make our own breakfast! Redon was a bit confusing to navigate but the owner of the gite kindly suggested a better route so we avoided the complicated town centre and took the scenic route along the canal and then up the river Ille-et-Vilaine. Redon also has a laundrette which is kind of essential when you are travelling light, and only have just over half of the clothes you will need to complete your holiday!
Today was our first full day on the canal, starting on the canal and ending on the canal. Today we cycled from lock 218 to 140, and changed from the river Aulne to the river Hyeres, then a section of actual man-made canal, up a serious section of up locks and arriving at Gouarec where the canal connects to the river Blavet.
A long day but a good day. Lots of nice things to see as we biked along - pretty place Brittany...
Our bed tonight is in another gite d'etape, this time in the old railway station. After unloading and a shower we went to explore, finding one shop full of British goods and the local tourist information office staffed by Brits!
This morning we were delayed slightly owning to a rivet snapping on our Karrimor panniers. There was no shop in the village to sell us a nut, bolt and washers to repair it so I had to do my best with a bungee cord. We left Gouarec and cycled onwards. We first visited the Abbey de Bon Repos, which looks more like a ruined stately home than an abbey. We next had to leave the towpath as in the 1930s a series of valleys through which the canal ran were flooded to build a hydroelectric power station.
We completed our cycle today at Pontivy when we arrived at our B&B next to the Chateaux. After a shower we went to explore the town, and to find a shop to buy a nut/bolt and some washers to fix the pannier. In the end we found a large out of town DIY shop and was able to buy 50 times what we wanted - so the pannier is now fixed.
Today we cycled from out hotel on the outskirts of Quimper to Lanndevennec on the Bay of Brest. The French roads are a quantum leap in quality over our roads in the UK: smooth surfaces, proper edges and wide enough to allow cars to overtake without knocking you into the bushes. Having said that, Breton drivers are much more bike aware than their British equivalents and do give you proper space when they pass.
Tonight we are staying in the gite d'etape in Lanndevennec, after some more galette and crepe of course...!
In the morning we cycled from Landevennec to join the canal at the last lock (No. 237) "Guily Glas". The road out of the village was only marked at 12% but it was a lot steeper in places - felt more like 50%... There were also some fearsome ups and downs along the route - I could smell the disk breaks on my bike on one of the descents and even then I trigged a speed indicating camera!
At Guily Glas we joined the canal where most people end it - we're doing the canal in the reverse direction to normal as it makes more logical sense from a route planning perspective. We then started to cycle along the cycle path, stopping for lunch at Chateaulin and finally stopping for the night at Chateauneuf-du-Faou between locks 219 and 218.
The cycling along the towpath or chemin de halage, was a lot easier going that the road to get to it - being very flat. The route is clearly marked, in good condition and has plenty of picnic tables and benches along it's length. I wouldn't take a road bike on the path but a robust hybrid bike or mountain bike is fine.
Pictures can now be found: picasaweb.google.com.
We cycled down to the station, we had to take a detour because of CarFest South and annoyingly we had to deal with some petrol headed moron who doesn't understand that single track lanes aren't wide enough to pass bike any more than tractors... My other half was nearly knocked off.
While at the station waiting for our train two planes from the Battle of Britain Memorial Flight came buzzing over.
We took the train without a problem to Portsmouth and boarded the ferry without problem.
We arrived in Brittany all okay. We cycled through Saint Malo to the station and took the train to Rennes where we changed for another train to Quimper. We then cycled to the hotel on the edge of town, dumped our stuff and cycled back to town.
We had two sets of galettes/crepes today one in Rennes and a second in Quimper. The Rennes one was okay but a fraction too salty for me but the second in Quimper was very nice and just what I needed after the bike ride.
Cycling may be a joke in the UK and something the government seems to hate and is clearly more popular and supported in France, but SWT's trains that have cycle provision are better than SNCF's trains... I really don't like the stupid hang your bike from the ceiling design.
Our faithful electric kettle started to die about a week ago, the automatic cutoff kept cutting off long before the water in the kettle had reached boiling point. It was at least 10 years old and was otherwise in good working order.
We had a look online to see what to replace it with. It seems almost all modern kettles available in the UK are 1.7 l capacity and have a 3 kW electric heating element with a minimum water volume of 2 cups (unspecified actual volume). Our old kettle was a mere 2 kW and would happily boil as little as 300 ml (one decent mug full of water).
We don't have PV panels on the roof so wouldn't benefit from a 1 kW kettle but even so, 3 kW to boil more water than I need for a single mug of tea seems very silly and inefficient. There are a few eco kettles that manage to boil only one cup full of water but they are few and far between...
In the end we found a 2 kW unit with a 1 l capacity and low enough minimum water boil volume. But it cost twice what the larger version from the same manufacturer cost.
While I know that tea and coffee drinking is quite a social activity in the UK, but there are plenty of households with only one person in or who drinks hot beverages. It seems that most people are probably wasting quite a lot of energy on heating/re-heating water that they probably don't need to.
It's been a while since I made jam or jelly for myself. Last year wasn't great for fruit and the jam I did make was sold in the Sheep Fair. This year I've make one batch of rhubarb & orange and a batch of redcurrant. Our green gage tree is happy so we may get some fruit from it by the end of the summer but better not count any chickens yet....
After a lot of work the Debian community has released Debian GNU/Linux 7.0 into stable. I run Testing on my desktop so it wasn't any change on that machine but on my others I therefore had to upgrade them, if I wanted them to stay on the stable/released version.
I first upgraded a couple of virtual machines and that was pretty painless. They had very little on them as they run as headless servers. I even changed the way they run within the virtual machine which should reduce their memory foot print and CPU load on the hosts system.
Next up was my better half's desktop system. Though it had a lot more installed on that the VMs it also went in fine without a problem. After that was a laptop. There were a number of issues with the laptop but they were not actually a problem with the upgrade, rather a problem hanging over from the original installation some years ago. Once the permissions were sorted out, everything started to work properly and all was well again.
The penultimate machine at home is my home server. It had a lot more server packages than the desktops on it but a lot less in the way of desktop apps to worry about. Upgrade time was very quick (I have a local APT cache) but there were issues - some of which are still over hanging. Dovecot didn't upgrade properly and required some tweaking to get it going again, though I never figured out why it didn't work... Exim also needed manual tweaking to reset it. The overhanging problem I have now is that KVM is happy to let my guest machines consume 100% of a CPU core on the host long enough so that it gets hot enough to complain... The fan on the system does kick in, but it can't cool a CPU running at 100% on a core for more than 30 minutes, so the BIOS shuts the box down.
So far I've tweaked the way KVM starts and I've set some processes onto a nicer setting but that won't help when the host isn't under much load and the KVM guest requests 100% of a host CPU. My next option is to use cgroups to restrict KVM to no more than 75% of one CPU core on the host.
A few weeks ago I bought a pair of Devolo 500AV Ethernet over mains units
to replace/extend a pair of 200AV units I already had. Someone asked if could
iperf to see how much faster they were.
To baseline what I had I ran the test from my desktop to my server over a 1 Gig switch and the most I could get was a feeble 333 GBit/s. I then tried from my laptop to the server on the same switch and that got a much better 740 GBit/s. The Marvell Yukon card on my desktop is a PCI device and the JMC250 in the laptop is a PCI-e so that may partially explain the differences.
Trying my laptop to the server via a 200AV/500AV/Gig-E switch gave a throughput of 56 GBit/s - about what you would expect. I then tried the laptop through a combination of 500AV/500AV/Gig-E but that wouldn't work as the JMC250 refuses to detect the 500AV. I then tried the laptop with different switches, it refuses to talk to my second Gig-E switch or my old Ethernet hub.
After some Goggling it turns out that the JMC NIC is a bit fussy and often fails
to auto-negotiate with some "green" Gig switches, such as in the 500AV or my newest
GBit switch, but is happy with older switches and plain Fast Ethernet. If you
manually set the speed with
ethtool then it's okay. I downloaded
the latest driver from JMC and that is a bit better but while it will connect
to my 500AV and my newer Gig-E switch automatically, it won't negotiate the correct
GBit speed, falling to the older 100 MBit setting.
Footnote: The JMC250 is a 1 Gig Ethernet NIC from JMicron Technology Corporation, not something from the Jupiter Mining Corporation...
Looking up French figures you can convert European Energy ratings to an annual kWh·m-2:
|Rating||French kWh·m-2||UK SAP|
|A||< 50||92 - 100|
|B||50 - 90||81 - 91|
|C||91 - 150||69 - 80|
|D||151 - 230||55 - 68|
|E||231 - 330||39 - 54|
|F||331 - 450||21 - 38|
|G||> 451||1 - 20|
Our house basted on last year at 104 kWh·m-2 for a 1936 house is doing very well in band C and not the band E that the idiot surveyers put it in.
Last week someone in the village was asking about installing PV panels on their south facing roof. From 01 April 2013 the government will only allow the full feed in tariff if you have already fully insulated your house - it is obviously pointless generating electricity if your house leaks heat like a sieve.
I checked the EPC chart for our house that came with the HIP when we bought the house. It's quite pathetic, it reports loft insulation of 250 mm when in fact there was only 100 mm when we moved in. It does however note the old boiler with primitive controller and lack of efficient light bulbs. It then gives some bland advice and ranks the house at grade "E" with a SAP score of 48. The best the house could be is apparently grade "D" with a SAP score of 55. That corresponds to an annual energy use of 314 kWh·m-2 falling to a minimum possible of 275 kWh·m-2. Annoyingly there is no explanation of how a SAP rating relates to a energy use per unit area.
This is all utter rubbish! We changed all the old bulbs to mostly CFL, plus some LED and some halogen the day we moved in. Last autumn we put in a modern boiler and controller and started to insulated under the floors. We added 200 mm of loft insulation taking it up to a minimum of 300 mm over the whole loft with the spare in the centre to >400 mm. We have yet to replace the windows and doors (A rated) and complete the under-floor insulation.
For the first full year we were in the house we used 137 kWh·m-2 (a cold year too and with the old central heating boiler & controller), which is better than half the potential minimum energy use and last year we used only 104 kWh·m-2 (mild year plus new boiler for the last 2 cold months).
I am in favour of improving things, but if the official schemes and assessments are so rubbish how are people who don't know ever going to figure out what to do...