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Gas Fires

Community Veteran
Posts: 7,917
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Registered: 02-08-2007

Gas Fires

Our gas fire has been in the house since it was built and at times is almost impossible to light as it uses some sort of spark ignition anyway the time has come for a new one but I am a bit puzzled by the claim that a glass fronted gas fire is far more efficient than an open gas fire ? how can that be.
We just have a standard chimney so we are not talking about a balanced flue fire just a standard one.
Anyone have any thoughts or advice on this ?
3 REPLIES
Community Veteran
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Registered: 06-11-2007

Re: Gas Fires

Presumably, with the glass in front of the actual flames.... the heat is by "convection"  as opposed to "radiation" which you are used to with the old gas fire. 
Radiation "feels" better, when you are standing/sitting in front of it, but modern heating is by convection as with radiators along walls,... and the whole room is heated by the convection currents set up by them being close to the wall ( the gap between the rad and the wall, acting like a chimney)... 
Community Veteran
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Registered: 30-07-2007

Re: Gas Fires

We have a balanced flue inset gas fire which has a glass front.
It's very efficient and does produce a significant amount of convected heat as shutter says. You'd be surprised how much radiated heat it also provides though...
Community Veteran
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Registered: 15-06-2007

Re: Gas Fires

I think that the basic reason is the effect of restricting and directing the air flow
With an open fire the air flow up the chimney is uncontrolled and takes away a lot of heat
This explains http://www.superiorfires.co.uk/search/grosvenor-high-efficiency-gas-fires.html#info-content-bottomca...
Quote
The main advantage of opting for a Grosvenor gas fire over other conventional open fronted gas fires is that these are high efficiency gas fires, without sacrificing on design.
The glass front of the Grosvenor range of flued gas fires significantly reduces the warm room-air being drawn up the chimney or flue. In addition to this, the convection air design draws in present cold room-air and circulates this through the hotbox to produce convected hot air back into the room. This increases performance and optimises efficiency.