--- In [email protected], "Roger Millin" <roger.mil...@...>
wrote:
>
> Sue asked:
> > Will 10,000btu boiler heat two double radiators plus a calorifier.
> How
> > do I work out what size we need?
> >
>
> 10,000 Btu *per hour*(note the difference) converts to 2.93 kW.
> On my 59ft nb, spray foam insulated, I had a Mikuni MX40 to operate
> one large double rad, one medium single rad and a small bathroom
> towel rail style rad. It could also handle the calorifier coil as
> well, if required. The MX40 is rated at 4.8 kW max and 2.4 kW at half
> heat. It took about half an hour to start to get the boat warmer on a
> chilly day with the Mikuni and longer to really feel a significant
> benefit (running at 4.8 for the first half hour or so). We also would
> have had a Morso stove running on cold days.
> I would think that 2.93 kW would take a while to heat up the boat
> but, once warm, might just about manage it (depending on external
> temperatures, boat insulation etc). Having said that though the
> Mikuni used to kick back into full power on really cold days so I
> suspect that 2.93 kW might be a little on the light side.
>
> You could also try adapting room dimensions and other data in a site
> such as http://www.radcalcs.com/ to calculate your requirements but
> it is a bit of a bodge as you are using a house based calculator for
> boiler sizing.
> Best I can do I'm afraid.
> Roger
>
Many thanks for the replies. I will have to hope we have the correct
size fire.
Sue
