Nick wrote:

Hi,

Would anyone happen to know of a combi boiler available in the US?

Thanks

Nick..

http://www.sippin.com/BurnhamBoilers.htm
just one example; there are many.
Available as either oil or gas-fired.
Or even wood as the fuel.

An "indirect" system uses a coil in the boiler
to transfer heat to a remote "tank" for domestic
hot water.
A "tankless" system uses the coil to directly produce
the hot water (no storage).

Can be built either as a steam heating system or
as "Hydronic" (circulating hot water thru rads or
fin-tube convectors or even radiant).

Jim