Hybrid Car – More Fun with Less Gas

Re: Radiant Floor Heat Water Heater ? - Page 3

register ::  Login Password  :: Lost Password?
Posted by News on December 8, 2003, 1:00 am

It heats water which is pumped around a circuit to radiators, hydronic
underfloor circuits, hot water cylinders, etc.  The lower the return
temperature the more efficient they are.  The cool return temperatures cool
the products of combustion of the gas burner.  When the these gasses are
below 54C they condense producing water.  During this process heat is given
off, making the boiler more efficient.   Many boilers have electronics to
assess the heat load and reduce the flow temperature to suit, promoting

Non-condensing gas equipment is designed not to condense, hence it all runs
at high temperatures, with all the ancillary equipment around the systems
also designed to run at high temperatures too.

See for a picture:


Checked by AVG anti-virus system (http://www.grisoft.com ).
Version: 6.0.548 / Virus Database: 341 - Release Date: 06/12/2003

Posted by Nick Pine on December 8, 2003, 12:00 pm

Water boils at 54 C in the UK? :-)


Posted by Michael Hemmer on December 8, 2003, 1:07 pm
 Nick Pine wrote:

At some height in Her Majesty's airspace, yes.


Posted by News on December 8, 2003, 4:31 pm

So having coffee way up is going to use a lot of gas.


Checked by AVG anti-virus system (http://www.grisoft.com ).
Version: 6.0.548 / Virus Database: 341 - Release Date: 05/12/2003

Posted by Enm on December 8, 2003, 10:41 pm
code, part PVG.  Boilers can be run with liquids other than water.
For some liquids, the boiling temperature might be much less than the
boiling point of water.  For liquids other than water, the safety
relief valves are made in such a way that none of the vapors are
allowed to escape into the work area.  A boiler using say alcohol
instead of water might have hot oil as its heat source rather than a

This Thread
Bookmark this thread:
  • Subject
  • Author
  • Date
please rate this thread