Energy Use

The energy use of my house was calculated by Paul using Hot 2000 a free thermal model used in Canada and by Mike using TAS software, both produced similar results.

The house uses 42kWh/m2/y about a third of the maximum allowed by Passive house. Heating is less than 6kWh/m2/y

The calculated heat loss for October is 100W average but we never need any heating before Christmas.

Continue reading Energy Use

Good Things Bad Things

Good Things

  • Warm, Quiet, Nice, Family like it
  • Uses about one third of the maximum energy allowed by Passivehaus
  • Ground warmed up,
  • No condensation anywhere or any signs of it

Bad Things

  • Green oak shrank and pinged off some edges of the lime render,
  • Lost some logged data,
  • Problems with auto shutter controls,
  • Heat exchanger tries to keep house warm in the summer!
  • The house is so well sound insulated that the easiest way in for noise is through the ceiling and even with 450mm of glass fibre quilt it is noticeable and I wish that I had double tacked the ceilings.
  • There was an unusual problem with condensation forming on the basement window lintels in the cavity and running down the outside of the window glass.
  • Front door lock broke several times in the first four years now it is fine.
  • even more remarkably I am on my sixth porch light 🙁

 

Maintainance

The house was designed to be very low on maintainance but as with all building things need to be done

Regular maintenance:-

Filter changes to MVHR, cleaning windows and frames, service window ironmongery – clean and silicone lube, I had relay patio near house due to settlement of soil fill near house sinking into the excavation batters.

Unexpected maintenance:-

Six new porch lights (remarkable misfortune), replace recessed LED strip lights to elliptical ceiling (too cheapo ones used initially), replace electric curtain motor, replace electric front door lock, three popped nail heads in plasterboard ceilings, one in basement two in front bedroom- filled with “onetime” filler and touched up invisibly with the original natural calico paint used on most ceilings.