limits on position of boiler

I currently have a combi boiler in my kitchen, which will be be extending in the near future. Because of this we need to get the boiler resited and I would like to have some idea of the rules for boiler. THis will alow me to have some idea of the possible layout for the final kitchen.
When we had a boiler changed before we ere limited in where we could place it so I understand that there are limits to how close the exhaust to certain items such as windows. I would like to know what the limits are and are there any with respect to the boundary.
thanks
dave
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What is the model of boiler? Type of flue? Open, balanced, fanned, condensing?
Christian.
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Christian McArdle wrote:

You should have the installation instructions with you, read on.
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Ed Sirett - Property maintainer and registered gas fitter.
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