heat outpit of a 24kw boiler

[Mgrant]

Can anyone help me with the heat output of a 24kw combi boiler. It says in the ideal manual

Central heating (CH) output is fully modulating with a range of: 24 4.8 to 24.2kW (16,500 to 82,600 Btu/h)

Does that sound right? Its for my NVQ Level 3 portfolio.

 

[Alpha man]

If it's in the MI's, then it must be!?

 

[Mgrant]

So this 24kw combi will heat between 16,500 to 82,600 btus. Seems a huge range can anyone explain this to me?

 

[Last Plumber]

Which bit do you need explaining?

It does what it says on the tin so to speak.

It has a max and min output, in other words it modulates.

If that's what the MI says.

So, for eg, if you boil a pan of water, you use a high burner to bring it to boil then when it's boiling you turn the gas right down to a simmer.
That's a really crude way of explaining but it's the general idea. The sensors in the boiler decide when it needs turning down.

Is that what you're after or am I off track ?

 

[Dotty]

1. It modulates according to demand.

1. You're looking at it in btus. It doesn't seem that large in kw.

 

[Mgrant]

Thanks well the property I am planning for my portfolio only requires 22,889 btus so a 24kw will easily do the heat output

 

[Mgrant]

or 6708 watts

 

[ShaunCorbs]

Top tip size combis on hot water outlet eg lpm Also take mains flow and pressure into it also

 

[Mgrant]

Thanks yes I know a 24kw is only really suitable for a one bathroom house at best. But I just need to size up the heating for this part no hot water requirement.

 

[Dotty]

What does your whole house calculation tell you?

 

[oz-plumber]

So, why if you need only 6.8 kW of heat and no hot water requirements, would you not specify a 12 kW boiler?

 

[ShaunCorbs]

So, why if you need only 6.8 kW of heat and no hot water requirements, would you not specify a 12 kW boiler?

Combi boiler , don't make one that small

 

[jtsplumbing]

Not 100% sure but I think Ariston Clas combi you can reduce the heat load down to 5Kw but will still kick in at high rate for hot water

 

[Last Plumber]

Not 100% sure but I think Ariston Clas combi you can reduce the heat load down to 5Kw but will still kick in at high rate for hot water

Can do that ( range rate ) vaillant too if you like