BTU calc help

[Pipedreamer]

Alright chaps,

I’m a bit embarrassed to actually ask this but need some help with something relatively simple.
I need to figure out the Btu’s required for a large open planned room but it’s a bit different from a ‘normal’ room and I’m so used to using a app to calculate sizes and my minds going blank on how to do it properly

The room is a converted garage that has a couple of walls that are stone and block with 50mm insulation and two walls that’s are

The room will then have studding put round internally with 100mm cellotex in.

The room will be open vaulted with a approximate size of ; 5.5m wide, 8m long and 2.4m to wall plate heigh and approx another 3m from there.

I’m unsure whether to work out it as a rectangle and then calculate the upper area as a triangle and double it to work out as a squared area (if that make sense)

And then unsure of how to calculate/allow for the insulation as there sort of two walls/insulation

Sorry if I’m being thick but hopefully someone can help!

 

[Pipedreamer]

Sorry forgot to add it’s siliconed concrete floor and will have approximately 12m square of doors and windows upvc double glazed

 

[exedon2]

The better online heat loss calculators allow you to have every wall different if required also change air change or any parameter you like.
I use stelrad stars but others are available .

 

[ShaunCorbs]

Around 6.4kw

 

[SJB060685]

Around 6.4kw

How have you arrived at that figure so quickly mate?

 

[Pipedreamer]

The better online heat loss calculators allow you to have every wall different if required also change air change or any parameter you like.
I use stelrad stars but others are available .

I’ll take a look cheers

 

[Pipedreamer]

Around 6.4kw

Thank you, but could you explain how you got to that please?

I appreciate the answer but would like to figure it out myself as well if possible

 

[SJB060685]

Do you know the R values of all the materials? If you do you can work it all out accurately. Takes a bit of time though but is a good exercise

 

[ShaunCorbs]

Worked it out approximately 2 outside walls etc

 

[Pipedreamer]

Do you know the R values of all the materials? If you do you can work it all out accurately. Takes a bit of time though but is a good exercise

No just what I’ve given and a rough idea of what’s happening

was hoping someone could give a relatively detailed breakdown of how they get to their conclusion