Radiator distance from floor / window cill

[Russel]

I am sizing up a radiator for a newly built room. Now, the bay window is quite large so the space underneath it isn't much.

With this in mind, I understand that the minimum from the floor is 15cm for effective air flow. Question is, how close to the window cill can I go? The window cill isn't sticking out by more than about an inch, so it wouldn't be covering the radiator from above by much at all...would 5cm be enough or is that too small a gap?

 

[ShaunCorbs]

depends are the rad sides removable ?

 

[Russel]

Don't think so, it's a regular Quinn Slieve horizontal radiator.

 

[Best]

If the window sill doesn't really protrude over the top of the rad much, like you say, then I would think any sort of reasonable gap would do fine to let the heated air flow.
I would guess 25mm would be acceptable, although would want more if possible, or if sill was out beyond rad depth.
You could if you really had to, hang the rad slightly lower than the 150mm to bottom of rad. I try to not go below about 125mm. It is not so bad if finished floor level is tiled, as carpets together with heavy underfelt can add a lot of depth to a floor

 

[Russel]

It will be carpeted (bedroom), but calcs take into account 11m underlay + 12mm carpet, so I will have about 15cm at bottom and 5cm at the top - thank you for the advice!

 

[Best]

50mm space at top sounds good. The rad should work well IMO.
I often have to put rads much closer to sills than that. The plastic window fitters tend to be too lazy and won't trim the width of new plastic sills I find

 

[REDSAW]

i like working on 8'' and 3''

 

[jonnyswamp]

i like working on 8'' and 3''

And my missus does
She'd like 8 but gets 3:blush5: