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Download the catalogue and request prices of Hv | window By internorm italia, aluminium and wood casement window with built-in blinds, studio, home pure. Page 1. ECOGLAZE. Ireland Ltd. File:Varion 4 HVjpg. From Wikimedia 4 HVjpg. Français: Varion 4_HV Date, 24 October , Source, Own work. Author, Internorm .

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The winner of the private housing award at the UK Passivhaus Awards, this upgraded s home proves that even existing varino can be made passive.

Both were studying for a masters in advanced environmental and energy studies at the Centre for Alternative Technology, Machynlleth. Adam’s interest in energy policy had inetrnorm him to the masters. But as time went on, the architectural side of the course drew him in. Concerned about energy security and climate change, he planned to sell his London home and move to the south-west of England to build a low energy, ecological home.

The passive house concept hooked him. His initial plan was to build new, but the difficulty of finding land and getting planning permission nipped that in the bud. Together with his wife Erica, he bought a run-down cavity-wall house on a modernist estate in Totnes, Devon, and planned to retrofit.

He interviewed other architects, but ended up hiring Janet.

s Devon home becomes certified passive B&B –

The two interviewed a handful of builders and — rather than going to tender — selected Jonathan Williams, whose background is in conservation building, and negotiated vagion price with him. According to Janet, Jonathan was the only builder they interviewed who had read up on passive house, and understood how hard it would be. The first step was to externally insulate the house.

Adam wanted to use a natural material, but internprm so would have resulted in very thick walls. What’s more, the team couldn’t heavily insulate the ground floor though they did put in 80mm of phenolic and 20mm of woodfibre insulation here without lowering the room height or undertaking expensive groundworks.

That meant using a high performance, synthetic insulation — mm of Kingspan Insulation UK K5 phenolic board — rather than a natural material. The external insulation helps to eliminate thermal bridging too. The existing wall cavity was filled with polystyrene Instabead, while insulating autoclave aerated concrete blocks were used to rebuild and extend wall sections that were close to collapse.

Janet designed a new 30 square metre timber frame extension that serves as an entrance area. There’s also a “living roof” planted with local wildflowers. It just seemed a sensible use of materials to me,” Janet says. The whole house scored 0.

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File:Varion 4 HV240.jpg

According to Janet, this result is down to meticulous detailing and education across the project team. These later units have an average overall U-value of 0. Janet paid close attention to shading design, and says the house stayed cool during this summer’s heatwave.

It’s one thing with PHPP you can fudge a bit,” she says. Designers must get shading right to prevent overheating, she says, otherwise people will say the passive house concept doesn’t work. Internal temperatures are steady, and when they change they do so very gradually. The only major overheating problem occurred when over people attended an open day at the house during a spell of warm weather. But during the cold winter ofthe ground floor was actually a little cooler than upstairs — most likely because the floor is ibternorm insulated to a U-value of 0.

Passive House Certificates – J&N Windows

Janet says there’s an important lesson here: The house’s only source of mechanical heating is the varioh recovery ventilation system, which u includes a small duct radiator in the supply air that’s fuelled by a little gas boiler. He admits that not installing a full central heating system was akin vagion taking a leap of faith.

But he’s still very comfortable — during his first winter the duct heater had yet to be installed, but he heated the whole house to about 19C with a small oil-fired radiator on its lowest setting W.

Solar thermal panels contribute to the house’s hot water, and Adam also installed a solar photovoltaic array with a 4kW peak output.

He installed PV partly for environmental reasons, but also because the feed-in tariff on offer at the time was quite generous. But the solar thermal and PV panels are facing west and east respectively, a constraint of the planning conditions.

Perhaps surprisingly, in hindsight he’s unsure whether such a deep retrofit is always the right solution for projects like his — in economic or environmental terms. Building a new house, he reckons, would have cost less principally because he would have got a big Vat discount for new build. And in carbon terms, he would have been able to use natural, low embodied energy materials throughout the build. Nonetheless, the project won in the private housing category at this year’s UK Passivhaus Awards and the whole Totnes team — Adam, Janet, Jonathan — went on to collaborate on various projects.

The trio have since founded Passivhaus Homes, a design-and-build passive house firm that is developing a ‘kit-based’ approach to building passive homes to bring costs down. They’ve just completed their first prototype. The company is also looking at working with community land trusts to develop new, affordable passive homes.


The trio have also launched a web business, the Passivhaus Store, which aims to streamline the supply of passive house suitable building materials and systems. Meanwhile, Adam and his wife Erica have opened up their Totnes passive house as a bed and breakfast. Adam says half their guests are people thinking of building their own passive house, visiting to get a taste of what it’s like to live in one.

So, if you really want to get a feel for the project, you could always go and check it out for yourself.

1970s Devon home becomes certified passive B&B

Adam blogged extensively about the project at http: Adam Dadeby Passive house certification: Aldas External insulation retrofit: Thermafleece Wood fibre insulation: Ecological Building Systems Windows: Internorm Masonry thermal blocks: Travis Perkins Thermal breaks: Space heating demand PHPP: Glapor foamed glass gravel insulating aggregate outside three perimeter walls. New roof on existing dwelling: Two courses of Foamglas Perinsul blocks at perimeters under toe of slab.

The Varion 4 units have integrated blinds for summertime shading. This bold retrofit project may be in Devon, but the story behind it starts in Wales. Windows are bracketed onto walls prior to external insulation installation to ensure a continuous insulation layer “I just like the idea of the small section vzrion I-joist, using low grade timber, and using as little of it as possible, and using the recycled newspaper [insulation].

The extension features a living roof But he’s still very comfortable — during his first winter the duct heater had yet to be installed, but he heated the whole house interrnorm about 19C with a small oil-fired radiator on its lowest setting W. The bright, sleek yet ecological kitchen Meanwhile, Ihternorm and his wife Erica have opened up their Totnes passive house as a bed interjorm breakfast.

Fronius Additional info Project overview: Latest from Lenny Antonelli New iinternorm finance platform offers chance to invest in Dublin passive house International: Powerhouse – the world’s toughest eco building standard Government failing to act on radon in rented houses International: Issue 25 Passive House Plus launches sustainable building web directory The slow, heavy gears of deep retrofit start to turn.