I need to replace an existing radiator and I'm trying to get a figure for the required BTU.
It’s a bedroom measuring 3m x 4m x 2.3m. The floor is wooden with a heated living room below. The ceiling is below a pitched roof with at least 100mm of insulation. There are two outside walls with an insulated brick cavity. The window is about 3m square with sealed double glazing.
The old radiator is a single non finned panel measuring approx. 1600mm x 500mm.
I've tried various online BTU calculators but the suggested required BTU varies wildly. I've had figures from just below 2000 BTUs to over 5000 BTUs and I don't know what to believe.
The lowest figure came from the calculator at http://cultfollower.net/radcalc2/BTUcalc.htm. This is the only calculator I’ve found that asks questions about the insulation of the walls, floor and ceiling.
I've just found another BTU calculator at heatandplumb.com that also asks about the room insulation which also gives a figure of just under 2000 BTU.
It’s a bedroom measuring 3m x 4m x 2.3m. The floor is wooden with a heated living room below. The ceiling is below a pitched roof with at least 100mm of insulation. There are two outside walls with an insulated brick cavity. The window is about 3m square with sealed double glazing.
The old radiator is a single non finned panel measuring approx. 1600mm x 500mm.
I've tried various online BTU calculators but the suggested required BTU varies wildly. I've had figures from just below 2000 BTUs to over 5000 BTUs and I don't know what to believe.
The lowest figure came from the calculator at http://cultfollower.net/radcalc2/BTUcalc.htm. This is the only calculator I’ve found that asks questions about the insulation of the walls, floor and ceiling.
I've just found another BTU calculator at heatandplumb.com that also asks about the room insulation which also gives a figure of just under 2000 BTU.