On Thu, 14 Sep 2006 07:08:09 GMT, Lobster
wrote:

|I posted a while ago with requests for help about insulating the sloping
|roof of my daughter's bedroom - thanks for all the help: plasterer
|finished yesterday and all looks hunky dory (hopefully so will my gas
|bill next spring).
|
|Anyway - now I need to install a new, appropriately-sized radiator.
|Trouble is I've tried a few "calculators", however they don't cover the
|complex shape structure of the room; cross-section looks like this
|(except the slopey bits are shallower than this):
|
| ________
| / \
| / \
| / \
| | |
| |____________|
|
|Also there's a dormer window built into one side of the room.
|
|For example:
|
|- The slopey ceiling is made up of 2mm plaster/9mm plasterboard/50mm
|polystyrene/50mm Kingspan/0 sarking/clay tiles.
|
|- Flat ceiling is 20mm lath-and-plaster/200mm Rockwool
|
|- Vertical external walls are 2mm plaster/9mm plasterboard/50mm
|polystyrene/50mm Kingspan/200mm solid brick
|
|I'm sure your average heating engineer would just eyeball the room and
|fit any old rad he knew would be at least OK, however I'd like to get it
|reasonably right! How do I go about this?

Put one twice the size you think would be right, and fit a TRV.
--
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