Fitting out assistance

[Jax59]

Hi canal world is there anyone who can advise on what btu’s we should get for our radiators.  We have a 57ft shell and intend running 5 radiators and a smaller bathroom one 

any ideas will help

[WotEver]

2 minutes ago, Jax59 said:

We have a 57ft shell and intend running 5 radiators and a smaller bathroom one 

From what?

[ditchcrawler]

What are you using as a heat source to feed these radiators. Ideally you want to match the output of the heater  with the capacity of the radiators 

Welcome to the forum by the way

[Tony Brooks]

3 minutes ago, Jax59 said:

Hi canal world is there anyone who can advise on what btu’s we should get for our radiators.  We have a 57ft shell and intend running 5 radiators and a smaller bathroom one 

any ideas will help

 

Ok - so what is going to heat these radiators and what is its maximum output?

[Tonka]

But they don't know how big a boiler they need which is why they want to work out the rad sizes. 

[blackrose]

4 minutes ago, Tonka said:

But they don't know how big a boiler they need which is why they want to work out the rad sizes. 

Yes, perhaps they are working backwards which isn't such a bad idea, but must have some idea of whether it's a solid fuel stove with backboiler or diesel heater?

Edited September 8, 2020 by blackrose

[Alan de Enfield]

It is a bit 'Chicken & Egg' do you fit a heat source and then match the radiators to suit, or, fit the radiators and then match the heat source to suit.

 

It is no use have (say) 10Kw of radiators and a 5Kw heat source.

 

There are many websites that will tell you how many Kw you need to heat a 'space' so simply work out the volume of the boat (for example, say the boat is 20 metres long x 2 metres high, x 2 metres wide, the volume is 80 cubic metres)

80 m3 would require approximately 8Kw

 

https://www.plumbnation.co.uk/heating-calculator/#roomType=livingRoom&hlcRoomHeight=2&hlcRoomWidth=2&hlcRoomLength=20&hlcGlazedArea=4&windowType=singleGlazedMetal&externalWalls=4&wallType=brickSolid105&belowRoom=soilUnderConcreteFloor&aboveRoom=flatRoofInsulated

 

You need to 'fudge' the figures as it is based on 'bricks and mortar'

 

You can then fit an 8Kw heat source (Diesel boiler, solid fuel fire etc).

 

Most NB's seem to be comfortable with a 5Kw heat source.

[Jax59]

15 hours ago, WotEver said:

From what?

It will be diesel

[Alan de Enfield]

5 minutes ago, Jax59 said:

It will be diesel

Type ?

Size ?

 

 

Its a bit like asking what size car tyres do I need without mentioning the make / model / wheel size.

[Jax59]

5kw Sebastopol

Sorry predictive text Webasto 

[Alan de Enfield]

3 minutes ago, Jax59 said:

5kw Sebastopol

Sorry predictive text Webasto 

 

Then you want 5Kw (or 6Kw) of radiators -the heater needs to work 'hard' to avoid carbonisation problems.

Where you put them and which size you use for each is down to your own choice.

[Mac of Cygnet]

5 minutes ago, Jax59 said:

5kw Sebastopol

Sorry predictive text Webasto 

 

Let's hope the text isn't predictive of the winter temperature!

[ditchcrawler]

You will probably be looking at double unless you have a lot of free wall space, A double is very handy for standing a tea mug on in the evening so the tea doesn't get cold, personal experience.