We have an ever growing database of information relating to the temperature and relative humidity of a passivhaus building. Externally we’re using a Davis weather station to produce a weather file and to monitor the internal conditions at the centre of the house.

We’ve also installed temp/rh probes in to the timber framed walls. These are in the service void, in between the OSB and the UdiFLEX wood fibre wool, at the interface between the UdiFLEX and the UdiTHERM  wood fibre boards (300mm from OSB) and also at the junction between the UdiTHERM and the UdiSPEED wood fibre boards (400mm from OSB). There are a set of these sensors on each elevation (e.g. N,S,E,W). If you’d like to see the house and how it is constructed see our Flickr page.

The construction of the walls are (from the interior) 12mm Fermacell, 38mm service void, 15mm taped OSB3, 300mm UdiFLEX wood fibre wool, 100mm UdiTHERM wood fibre board, 40mm UdiSPEED wood fibre board, 7mm UdiPERL self coloured render system. The U-value is around 0.1 W/m2K.

We’ve had a few issues with stability of the connection between the sensors and the computer which is logging data but we seem to have this under control now. Apologies for the holes in the data, hopefully this will disappear from here on in.

If anyone would like the data please contact us. I’ll host it in a public dropbox and send you a link.