Passive house Shepards hut ?

[Waterworks]

Would it be possible to design a Shepards hut on a passive house principle ?

 

This would be a pretty big maybe 3 x 6 metres internally , and clad in galvanised corrugated sheets.  The design would take into account up to 300mm of PIR insulation, maybe vacuum panels in the front door and there would certainly a small wood stove. 

 

What would the design need to consider ?

[JohnMo]

5 minutes ago, Waterworks said:

300mm of PIR insulation

Why that much?

7 minutes ago, Waterworks said:

vacuum panels in the front door

Over thinking things.

 

You can use passivhaus principles for any build.

 

Main things are thermal bridges, continuous insulation, form factor, airtightness.

 

So you need to consider ventilation.

 

[ProDave]

With that level of insulation and such a small space, don't fit a WBS, you will melt the first time you light it.

[saveasteading]

2 hours ago, Waterworks said:

Shepards hut on a passive house principle ?

Of course. But any time you open the door most heat will shoot out so I can't see the point.

And the surface area compared to volume also provides a poor figure.

 

Spending a fortune on sustainability for a building that is far from sustainable through the material/carbon content doesn't make sense.

 

A shepherd would not do that.

[Crofter]

PassivHaus is all about energy/m², rather than total energy. Which I think is wrong and drives up house sizes.

We don't measure cars in mpg per ton of vehicle. 

 

Also, it's very difficult to meet PH standard in a small build because the volume: surface area ratio favours larger buildings. Another thing counting against a PH Shepherd's Hut is the exposed floor. You've got a very large surface area and a small volume inside it. 

 

I came up against all of this on my own build, which is a 5*10m house on legs.

[Iceverge]

20 minutes ago, Crofter said:

PassivHaus is all about energy/m², rather than total energy. Which I think is wrong and drives up house sizes.

We don't measure cars in mpg per ton of vehicle. 

 

Also, it's very difficult to meet PH standard in a small build because the volume: surface area ratio favours larger buildings. Another thing counting against a PH Shepherd's Hut is the exposed floor. You've got a very large surface area and a small volume inside it. 

 

I came up against all of this on my own build, which is a 5*10m house on legs.

 

Exactly this. 

 

https://passivehouseplus.ie/magazine/insight/the-small-passive-house-problem-a-solution