the conversation continues in a fascinating way
It did strike me that one of the things that it would be prudent to do, would be to actually get some data points:
In particular, from stone cold, turn the heating on to maximum nuke: and log the temperature of the air in my lounge (the large area with the underfloor heating), and also log the outside air temperature (in case there were large "wobbles" outside) and geta sense for the... "inverse half life" as I guess I'm going to have a logarithmically increasing temperature, till it asymptotically reaches maximum. From this I could get a sense of wha tthe slope of hte temp increase graph is.
I really have no idea at the moment: historically I'd leave it on 24/7,when it started feeling al ittle overly hot, turn some of the circuits off (it was wired up with multiple circuits in teh screed originally).
I am aware this is rather akin to regulating the temperature in a cetnrally heated room, to opening the window if it gets a bit hot (as I witnessed in college rooms in my first year, where the heating system seemed to have no mechanism for room occupants to turn the rads down !?!?!).
Safe in teh knowledge a theoretical understandign of the problem exists, I may of course never actually install any form of solution -- but that's what comes of being a mathematicican I suppose
More seriously though: to log temperature: that again appears to be a non trivial task. Perusing ebay: it appears that £30 or so gets you a battery operated stand alone temperature logger, that can download by USB. so to do outside and inside is already going to cost be £60.. jsut to get a handle on the problem! god help me if I wanted to do more.
(e.g. the voltcraft dl100-T), and something similar at £34 is the cheapest i can find on fleebay at the moment...
Any cheap off the peg solutions out there for temp logging
(with ultiple sensors) anyone knows of... ?
I lovedthe link to the discussion of the amazing shower btw