"Andrew Gabriel" wrote in message
...
In article ,
Martin Brown writes:
On 16/06/2014 13:01, Rick Hughes wrote:
A couple of years back I posted a question .. didn't get very far,
thought I'd try again.

I have a modern highly insulated 2 storey house, and this time of year
the upstairs get very hot .... and with high values of insulation it
does not cool quickly ... bedrooms are very hot.

That isn't right then. Is it ingress of heat from the roof or trapping
heat in the rooms from the sun coming through the bedroom windows?

Well known problem with many modern houses - they have no internal
heat capacity, and so only a small amount of energy getting in
causes a significant temperature rise. Lack of loft insulation
would make it very bad (radiating heat from the hot ceiling), but
even with loft insulation, it can be a major problem.

I have two loft hatches - the summer one has a 10" Expelair fan
mounted in it.

Trade name cock up:-)? ie Xpelair

I watched the wholesaler google for it today when I needed a DX400 and two
CF40's.



--
Adam