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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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unvented gas fire
Probably not a DIY topic but I think there will be folks out there who
have an opinion. I need to move my gas fire to a new location as I'm rearranging the room layout. I'm limited as to where a balanced flue can go, and unless somebody has a good idea I don't think I will be able to use the existing chimney. The chimney is a line of hollow bricks going up the cavity wall ca 1980. I've seen several models of flueless fires which claim to be 100% efficient and deliver up to 3.5 KW, which would be adequate. I find it hard to accept the idea of filling up the room with CO2 as being a good thing, though I guess they must be approved and considered safe. Comments anyone? |
#2
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unvented gas fire
andyv wrote:
Probably not a DIY topic but I think there will be folks out there who have an opinion. I need to move my gas fire to a new location as I'm rearranging the room layout. I'm limited as to where a balanced flue can go, and unless somebody has a good idea I don't think I will be able to use the existing chimney. The chimney is a line of hollow bricks going up the cavity wall ca 1980. I've seen several models of flueless fires which claim to be 100% efficient and deliver up to 3.5 KW, which would be adequate. I find it hard to accept the idea of filling up the room with CO2 as being a good thing, though I guess they must be approved and considered safe. Comments anyone? They are safe given that they are fitted with a catalytic(sp?) converter, similar to those in cars. That said, I still wouldn't have one in a room without good ventilation, and by good ventilation I mean an unobstructed 9 inch by 6 inch permanent vent (not a sliding louvre type), overkill yes, but I doubt if it would be noticable with the heat that flueless fires give out. |
#3
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unvented gas fire
andyv wrote: Probably not a DIY topic but I think there will be folks out there who have an opinion. I need to move my gas fire to a new location as I'm rearranging the room layout. I'm limited as to where a balanced flue can go, and unless somebody has a good idea I don't think I will be able to use the existing chimney. The chimney is a line of hollow bricks going up the cavity wall ca 1980. I've seen several models of flueless fires which claim to be 100% efficient and deliver up to 3.5 KW, which would be adequate. I find it hard to accept the idea of filling up the room with CO2 as being a good thing, though I guess they must be approved and considered safe. Comments anyone? The catalytic converters should deal with any CO that's produced - that's the real nasty stuff. I guess the CO2 would be no different to a gas hob running..... |
#4
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unvented gas fire
andyv wrote:
Probably not a DIY topic but I think there will be folks out there who have an opinion. I need to move my gas fire to a new location as I'm rearranging the room layout. I'm limited as to where a balanced flue can go, and unless somebody has a good idea I don't think I will be able to use the existing chimney. The chimney is a line of hollow bricks going up the cavity wall ca 1980. I've seen several models of flueless fires which claim to be 100% efficient and deliver up to 3.5 KW, which would be adequate. I find it hard to accept the idea of filling up the room with CO2 as being a good thing, though I guess they must be approved and considered safe. Comments anyone? ventilation, i would be in agreement with phil on the overkill vent!, obviously you will have a window in the room that opens too. out of interest i would like a look at the manufacturers installation instructions if you do go ahead and fit one of these, just to find out if there is yet a 'common' way of installing/venting/room size etc |
#5
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unvented gas fire
I'm still undecided, but it's an interesting comment about gas cookers
as these usually vent straight into the kitchen. Not everybody has an extractor. A regular gas fire, such as I now have also probably vents some of its exhaust into the room too. |
#6
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unvented gas fire
The news groups are fine for getting some ideas about this, but I'd be
astounded if the installation notes for these appliances didn't exactly specify the minimum ventilation requirements, probably in relation to the size of the room they're installed in. |
#7
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unvented gas fire
andyv wrote:
I'm still undecided, but it's an interesting comment about gas cookers as these usually vent straight into the kitchen. Not everybody has an extractor. yes, but only for limited time. Running one all day is not smart. I wouldnt install an unvented fire myself. They arent as safe as vented, but more to the point youre breathing in the fumes day in day out. I've been to a few places with old ones installed and cant say I liked the atmosphere too much. They will also deposit a fair amount of damp of course. I think you could do better. NT |
#8
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unvented gas fire
OK I think I have a viable idea. See what you think.
The existing fire has a chimney which runs up the cavity wall into the loft. Here it runs in a concrete pipe and exhausts out through a vent in the apex of the roof. What if I was to fit an extractor fan into the piped section in the loft? I could then have the room downstairs turning over the air and sucking out the excess CO2 just as if it was going out of the window or a conventional vent in the wall. I'd have a grating on the wall hidden behind furniture. I don't fancy an extractor fan in the room itself unless anybody can point me to an ultra quiet one. Also it may even be possible to get a switch which operates when the gas is flowing so the fan is automatically turned on. |
#9
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unvented gas fire
andyv wrote:
OK I think I have a viable idea. See what you think. The existing fire has a chimney which runs up the cavity wall into the loft. Here it runs in a concrete pipe and exhausts out through a vent in the apex of the roof. What if I was to fit an extractor fan into the piped section in the loft? I could then have the room downstairs turning over the air and sucking out the excess CO2 just as if it was going out of the window or a conventional vent in the wall. I'd have a grating on the wall hidden behind furniture. I don't fancy an extractor fan in the room itself unless anybody can point me to an ultra quiet one. Also it may even be possible to get a switch which operates when the gas is flowing so the fan is automatically turned on. If you install a vent in the living room wall, and leave the existing flue open, you can do away with the extractor fan altogether as the air will naturally flow up the chimney (it will even without a vent, hold a lit match in front of it if you don't believe me!) The manufacturers insist on their safety as do British standards and gods knows what other governing bodies, but when push comes to shove, the waste products from that fire are going to end up in that room at some stage in whatever form and over a long period of time, I can't see how this is going to be benificial to either the room or it's occupants. You'll find that a permanent vented room as mentioned above will make it a lot more comfortable, and dryer too considering the water produced by burning gas. |
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