Radiator BTU output

[tsomo2000]

Hi All

I am wanting to replace some old radiators, one in my living room, one in my dining room, as well as adding an additional radiator in the living room.

If i post up a plan of my downstairs would anyone be able to advise what size/output radiators I would need?

Thanks

Alex

 

[ajstoneservices]

Fill your boots http://www.radcalcs.com/

 

[tsomo2000]

Cheers mate.

If i am adding an additional radiator, is it a case of simply dividing the total BTU output for the room over the 2 radiators.

i.e if the calculated BTU output of the room is 8000 BTU's would i simply buy 2 radiators that give an output of approx 4000BTU's each? Or go over the top and get 2 radiators that give out 6000BTU's each (12000 in total)?

The room has a bay window and is very cold in the winter.

 

[jackpike]

radiators are always better under the window for 2 reasons
1. it keeps all the other wall free to put funiture/cabinets there
2. a rad under a window makes for better convection of warm air.

it might cost more but worth it for a better job

check this site, they will make one for you,
http://shivradiators.com/.

 

[ajstoneservices]

Cheers mate.

If i am adding an additional radiator, is it a case of simply dividing the total BTU output for the room over the 2 radiators.

i.e if the calculated BTU output of the room is 8000 BTU's would i simply buy 2 radiators that give an output of approx 4000BTU's each

Yes.

The room has a bay window and is very cold in the winter.

You don't say what type of bay. If it's curved them if cost is a problem the link given by JP is an option. If your bay is flat (or curved) then you should be able to add a rad there with little difficulty.

 

[TicklyT]

..... Or go over the top and get 2 radiators that give out 6000BTU's each (12000 in total)?.....

If your calcs end up with outputs between available sizes, opt for the larger size. Some add about 20% to their calculations 'for luck' anyway - it saves them a call back if a rad. isn't quite up to it's job.

You can always throttle down an oversized rad, but one that's already going flat out can't work any harder.

 

[tsomo2000]

the bay window is straight and there is already a radiator under it. The additional rad is to be installed on an internal wall in the same room.