Back boilers

[W+T]

This is a Q for those who are in the know on central heating plumbing on boats using a back boiler.

 

What does the central heating system consist of when using a back boiler on a stove, what will i need to set one up to run of a boiler of no specific stove for a single radiator, are they pressured systems or open vented etc etc .

 

All advice welcome as always

 

wayne

Edited March 29, 2010 by W+T

[Robbo]

Open vented, copper pipes (28mm min) for gravity system, radiator(s) big enough to take heat away, header tank. Optional pump. There was a recent conversation with a diagram in...

 

Edit; found http://www.canalworld.net/forums/index.php?showtopic=25064

Edited March 29, 2010 by Robbo

[bottle]

One radiator?

 

It will need to be a very small boiler or a very large radiator.

 

Boiler needs to match radiators output or the other way round.

[W+T]

One radiator?

 

It will need to be a very small boiler or a very large radiator.

 

Boiler needs to match radiators output or the other way round.

 

So for a radiator of 18 inch x 24 inch what size boiler would i need?

 

thanks for that info mate.

[alan_fincher]

So for a radiator of 18 inch x 24 inch what size boiler would i need?

 

thanks for that info mate.

I'm guessing that if you can only accommodate one radiator, and that is the maximum size, you would struggle to find a small enough back boiler, as that rad will not be able to dissipate the heat fast enough ?

 

Obviously a double panel radiator, with finning, would dump heat faster than an unfinned single panel of the same size, but I still feel it would not be enough.

 

I'm happy to be told I'm wrong though, as I've never tried it!

[bottle]

Info gained from Screwfix:

 

http://www.screwfix.com/prods/37677/Plumbi...mm-1743Btu-511W

 

As you can see this is rated at 511 watts (½Kw)

 

http://www.screwfix.com/prods/49023/Plumbi...tor-600-x-400mm

 

and this one at 380 watts (⅓ Kw)

 

Now I am not a heating engineer but even with losses in the system, I suspect that a boiler of 1000 watts (1 Kw) would be to big.

 

Willing to be corrected obviously.

[W+T]

So then, what size boilers do you have on your stoves, and what/how many rads do you have, i am on palnning to make my own boiler so i can make it what ever size ai need, if it needs to be a size that wont work fair enough but no harm in trying.

Could even do under floor heating, will take more heat out of the system

[Robbo]

Could even do under floor heating, will take more heat out of the system

 

Remember underfloor heating requires a lower water temperature than radiators, mainly due to warping the floor..

[bottle]

I do not have a back boiler.

 

I have a Morsø Squirrel rated at 6Kw maximum output in a sixty foot narrowboat and not run it above 'tick-over' since last August.

[W+T]

Remember underfloor heating requires a lower water temperature than radiators, mainly due to warping the floor..

 

 

Wasnt serious mate. , my god imagine walking on a radiator LOL

[Robbo]

Wasnt serious mate. , my god imagine walking on a radiator LOL

I'm looking at underfloor heating for my boat!

Edited March 31, 2010 by Robbo