Rossymcg

Good idea. I'm investigating the idea of fitting a heat exchanger in the mix. You think it could work? One question the belimo, is there an automated switch that detectes the pull of current through the cable feeding the hood and switched it on? TIA

that's not only what I was taught, when I was working in some recording studios. The fibres in the insulation split the sound waves as it hits them. Reducing it down with each split.

thanks for that.

OK never mind. you happy with that?

I'm building a house in Poland, it will be insulated and airtight to passive standards. The design is for 200mm EPS and 250mm of concrete(it's a raft foundation) how did the 250mm of concrete heat up in the end