On Fri, 15 Mar 2013 22:36:58 -0000, "Ophelia"
> wrote:



>>>
>>> Which kind of heaters to you mean?
>>>
>>> --
>> If it's movies of the '30s, '40s, he's probably talking about
>> radiators.
>> http://img.ehowcdn.com/article-new/d...8460983_XS.jpg
>
>Hmm we call that a radiator. We see them like that in old buildings.
>
>--

I rather like the old cast iron radiators. About the 1950's they were
starting to be phased out in favor of the newer baseboard heating
systems that were usually a copper tube with aluminum fins behind a
metal enclosure. There are cast iron baseboard units too and they are
often used in remodels where there will be a mix of baseboard and old
cast iron radiators.

The big hunks of cast iron had great thermal mass. They could keep
the temperature even for a long time, but they were slow to respond
when you did want to make a change.