I want to know where i can buy a heat calc for sizing up radiators i have seen one before but cannot find one?

you use this table to find the size reqiured (radiator) for the relvent room i know how to to the calc on paper but want to find the calc that does it for you as its much quicker and easier basical you line all the relevent windows up and it tells you the energy needed for that room

Answers:
You can actually do the calculation yourself and that is great. I am sure you could plug what you know into a spreadsheet and you are home and dry. This assumes you have got a PC or laptop of course. Perhaps plumbers or heating engineers sell dedicated small calculators for this purpose and I can see that would be handier.
If you can calculate it yourself, why bother buying a program. Write your own.
You should be able to get one from a good plumbers merchant.

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