I have had three flueless gas fires, you know the type with cats and have never had a problem getting a gas safe enginer to fit them....anyway a friend has had three recent knock backs with regard to fitting one ....what has changed ?... they are still being sold but gas safe engineers refuse to fit any more.....why? any ideas...been told 'the rules make it very difficult'.....
They make a lot of condensation.
Bill
Well all that water vapour has to go somewhere I'd suppose. I recall the issues with stand alone paraffin heaters in the 60s and 70s where the paint would end up yellow with the muck. I doubt that would be so bad with gas, as it can burn purer, but surely you need to have a well ventilated room or the oxygen levels against toxic gas would soon be rather dangerous. At least that was whet the shop told us about the ones which ran on bottled gas and were thus semi portable. Brian
I'm just wondering what is the rate of air movement through the required 100 cm3 ventilation when the wind is around 63 mph outside (last night's predicted wind speed)? Does such a heater actually contribute any warmth at all in high winds and low outside air temperatures? Or would you be warmer by removing the heater and sealing up the hole in the wall?
There is a catalyst up near the top vent of the device, that converts emitted CO into CO2. You could still potentially smother, but the appliance is supposed to have an "oxygen deprivation" sensor. I didn't see any details on how the "ODS" works.
The CO is still not zero. There is an allowed ratio of CO to CO2 at the output. The installation manual does not mention what the room CO level should read out at (at max fire). The performance check is done by measuring CO and CO2 and taking a ratio.
"Adverts for the catalytic gas fires..."
"Max Energy Input 2kW Min Energy Input 1kW"
"Ignition Double Piezo Spark"
"The room size MUST be a minimum of 23 cubic meters"
It also requires an air vent, to allow some mixing of outside fresh air, with the air in the room. And you can't stick the vent, too close to the machine (as it throws off the ODS). How an intake vent works, when there is no exhaust vent, is left as an exercise for the reader of the installation manual. It's almost as if some gas standards document calls out a vent that size, on the assumption the device has a flue.
Paul
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