adding a towel radiator

[jonnyp1]

i am just putting in a small bathroom on 2nd floors (ground, 1st second fllor) boiler on ground floor. it transpires the central heating system up there only has 15mm pipe. someone said i would have trouble getting an extra radiator on. the current system has 2 small single radiators and one small double radiator (70cm by 50cm) , i intend to add a small towel radiator 60cm by 60 cm (1256 btu) can anyone see any problems.
cheers jon

 

[Bahco]

Try it and balance your system.

If it does not heat up then change the pipes going upstairs to 22 mm

 

[gas4you]

I wouldn't have thought it would make any difference on a small system such as you say you have. 15mm pipe will handle up to 14000 btu (4Kw)