I should have said... the extension room leads from the kitchen and will either house dining room or living space. We will put storage on the far wall, bifold doors on front, and the back wall (attached to house) is likely to be where we have seating, either for dining or lounging. So the left wall is the only practical place to put a radiator where is won't get in the way. I agree it's not ideal to have the radiator as the first thing you see, which is why I was thinking of making it a non-standard type e.g. vertical, but I'm not sure which will be more practical and least unattractive. This is an approximate plan of the layout...

What about an Outline radiator from the brand Eskimo? They can be made to any size, and customised with wireless controllers. They are very high performance, but energy efficient and unobtrusive. See if you can spot the two hidden in this room: Eskimo Outline Radiator in Matt White Let me know if you would like to hear any more information about these radiators, or have a look at the range on our website (there's wood, bamboo and mirrored radiators too!) Phoebe

Thanks KWG - this is not good but there is always a solution. 1. The most hassle-free and least bothersome to the plumber is to increase the thickness of the wall. For condensation issues your plasterer has raised, you should ask for 'foil-backed' plasterboard. These are vapour panels that block or limit condensation. Get the best rated one. 2. The alternative is to change your radiators to a configuration that allows the pipe to attach from behind and the valves attach from underneath (see image). It will save you a crucial 8-10cm. On this note, I've just seen that I forgot to post my link for the more detailed BTU calculator: https://www.traderadiators.com/acatalog/heating-calculator.html If you can find something that suits your heating specifications and your taste, this will mean you won't need to compromise on your vision. I hope this has been helpful. Kind regards, Faten

We're the UK's leading supplier of Vertical Designer Radiators, James - we specialise in this sort of thing. Check out our page on here, or visit https://www.bestheating.com/radiators/designer-radiators/vertical-designer-radiators.html to find affordable solutions with industry-leading product guarantees. Happy Heating