"harryagain" wrote:
"Stephen" wrote in message
...
Hello,

I've moved into a house with a wall-hung flue less gas fire. I haven't
had one of these before. I'm off to buy a CO detector but in the
meantime, can you tell me about these? What colour is the flame
supposed to be? When I light this it has a yellow flame. I thought
this was supposed to be a bad thing as I thought yellow meant it was
not burning completely. However there are no signs of soot above the
fire nor inside it and pictures I have found of similar fires on
google show yellow flames too. I guess if the flames burnt pale blue,
people would not see the flames, so they wouldn't look as pretty. Do
ukdiy-ers vacuum the fire once a year like you may do to your boiler
or is it best to leave it to a gas safe person. I'm sure the CO alarm
will reassure me, just wanted to hear some opinions in the meantime.

Thanks,
Stephen.

The flame is yellow because of glowing carbon particles.
This is an indication that carbon monoxide may be being made.
It happens by a "reduction" process.
CO2 (carbon dioxide) passes through the hot carbon particles and is reduced
to CO.
Sometimes it gets burnt back to CO2 later in the process but it may be
escaping into the room.
Do not use until it has been serviced.

The gas fires with a coal/wood yellow flame effect have massive amounts of
extra air introduced "above" the flame to ensure CO is converted to CO2.
Hence they are very inefficient.


You don't say which you have got.
Definitely get a CO alarm.
All gas fires are very inefficient by todays standards.

Mostly ******** (with regard to flueless appliances).

Have a look at
http://www.fireplaceadvisor.co.uk/si...pros-and-cons/

Tim