Guys, I'm just about to order rads from Stelrad, but have hit a glitch and I'm so confused. My plumper is suggesting going bigger, but to calculate by watts and not BTU 
Example:
My bedroom is W 5m x L 4m H 2.3m Window area 2.4m2.
My current rad is H600 x W900.
The Stelrad BTU calculator is giving me an ideal BTU figure of 2824 (827w). But the rads that give this output are by far and way smaller in size than my current radiator.
To get the correct Stelrad BTU radiator I'd need to go for either a 600 x 700 OR a 450 x900 (Double Panel, Single Convector).
If I went for my current sizing 600 x 900, the BTU output would be 4137 (1212w).
Would going for a higher BTU be super expensive to run? I have a Tado heating system, if that makes a difference.
The loft has 2 radiators as the room is 8m x 5m, window area 2m2, and that's an even bigger confusion! And if fitting larger rads with higher BTU will affect energy use, then I'd most likely be skint 😩
Example:
My bedroom is W 5m x L 4m H 2.3m Window area 2.4m2.
My current rad is H600 x W900.
The Stelrad BTU calculator is giving me an ideal BTU figure of 2824 (827w). But the rads that give this output are by far and way smaller in size than my current radiator.
To get the correct Stelrad BTU radiator I'd need to go for either a 600 x 700 OR a 450 x900 (Double Panel, Single Convector).
If I went for my current sizing 600 x 900, the BTU output would be 4137 (1212w).
Would going for a higher BTU be super expensive to run? I have a Tado heating system, if that makes a difference.
The loft has 2 radiators as the room is 8m x 5m, window area 2m2, and that's an even bigger confusion! And if fitting larger rads with higher BTU will affect energy use, then I'd most likely be skint 😩