Gas Detector recs please
 

The first question my wife asked in the aftermath of the awful gas explosion
earlier was "Have we got a GD in the house?"

http://www.bbc.co.uk/news/uk-england...shire-35610607

We live in an old 2-up-2-down terrace. In the (extended) kitchen, there's a
Baxi combi boiler, installed 12 years ago to provide GCH.

The (Town) gas supply was routed thru the loft. A quick google shows that
town gas (rotten eggs) is lighter than air. In my case I will need a GD near
the kitchen ceiling and another one, high in the loft. Fitting a mains one
in the kitchen is fine but problem is, I have no electrics in the loft and
the one's I've spotted on an Ebay search, all need mains power :-

http://www.ebay.co.uk/sch/i.html?_fr..._ipg=200&rt=nc

Most of these are the portable one's use by Gas Board bods. Ideally I would
like one that you could permanently hang on the wall, similar to the smoke
alarms and powered by a 9v battery. I have lots of re-chargeable 9 volters'.
TIA

Gas Detector recs please
 

Bertie Doe wrote:

The first question my wife asked in the aftermath of the awful gas explosion
earlier was "Have we got a GD in the house?"

It's not exactly normal to have one fitted, though as you've found
they're available, probably more lives would be saved by fitting
dangerous dog detectors ...

The (Town) gas supply was routed thru the loft.

You have a pipeline from the 1970's into your house?

Gas Detector recs please
 

In article ,
Bertie Doe wrote:
The (Town) gas supply was routed thru the loft. A quick google shows
that town gas (rotten eggs) is lighter than air.

Town gas? Where are you? Most of the UK converted to North Sea gas some 40
years ago.

--
*The man who fell into an upholstery machine is fully recovered*

Dave Plowman London SW
To e-mail, change noise into sound.

Gas Detector recs please
 

"Bertie Doe" wrote in message ...
The (Town) gas supply was routed thru the loft. A quick google shows that
snip
the one's I've spotted on an Ebay search, all need mains power :-

http://www.ebay.co.uk/sch/i.html?_fr..._ipg=200&rt=nc

Interestingly, if you did the same Ebay search for "Gas detector" omitting
the word "combustible" you will see from items 9 and 11 onwards, that the
vast majority are for CO detectors.
http://www.ebay.co.uk/sch/i.html?_ip...ct or&_sop=12

Fair enough, CO is a gas but I wonder how many non d-i-y'ers believe they
have installed a combustible gas detector?

Gas Detector recs please
 

"Andy Burns" wrote in message
...

Bertie Doe wrote:

The (Town) gas supply was routed thru the loft.

You have a pipeline from the 1970's into your house?

Ah, looking at Dave's post, it maybe North Sea Gas. When we moved to
Cornwall 15 years ago, there was no gas. We used a Morso coal/wood heater,
brrr.

Gas arrived in the road 12 years ago. The local Gas Board dug up the front
path, took gas supply to front door and put a meter on side of front porch.

We got a plumber to install a GCH system. He ran the supply from the front
porch, up into the loft and dropped it down into the extended kitchen at
rear of property.

I guess the chance of having a gas leak in the loft is remote as he has
hidden the piping under the loft floor-boards. However, gas leaking from the
boiler at kitchen level, is likely to end up in loft?

Gas Detector recs please
 

You'd be astounded as to how much gas it would take to leak into a room before the concentration of gas in air gets anyway close to the lel (lower explosive limit). If you are really so scared it might happen to you try getting a competent person to carry out a soundness test on your installation.

Gas Detector recs please
 

On 20/02/16 15:50, wrote:
You'd be astounded as to how much gas it would take to leak into a room before the concentration of gas in air gets anyway close to the lel (lower explosive limit). If you are really so scared it might happen to you try getting a competent person to carry out a soundness test on your installation.

yeah yeah tell it to Haxby

http://www.bbc.co.uk/news/uk-england...shire-35610607


--
To ban Christmas, simply give turkeys the vote.

Gas Detector recs please
 

On 20/02/2016 15:50, wrote:
You'd be astounded as to how much gas it would take to leak into a room before the
concentration of gas in air gets anyway close to the lel (lower
explosive limit).
If you are really so scared it might happen to you try getting a
competent person
to carry out a soundness test on your installation.

Isn't a leak test a mandatory part of the annual servicing of a gas
boiler? I know the guy I have check my parents does a leak test.

The only time it might be sensible to have a combustible gas detector is
if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.

Gas explosions are so rare and spectacular they make the national news.

--
Regards,
Martin Brown

Gas Detector recs please
 

On Sat, 20 Feb 2016 14:39:05 -0000, "Bertie Doe"
wrote:

. Ideally I would
like one that you could permanently hang on the wall, similar to the smoke
alarms and powered by a 9v battery. I have lots of re-chargeable 9 volters'.
TIA

http://www.amazon.co.uk/Natural-Gas-.../dp/B00CGZWSIO

http://www.amazon.co.uk/Mercury-350-.../dp/B003B1W3GE

http://www.carbonalarm.co.uk/gas-detectors/

Gas Detector recs please
 

no doubt the vultures will be circling to sell methane detection equipment.

Gas Detector recs please
 

Don't know if Ed Sirrett is still dipping in here from time to time but the Corgi magazine used to report incidents and the follow up actions. There were always reports of removal from the register for unsafe work. I've been retired for some time and out of the loop but Ed might know if Gas Safe are as stringent. Things like leaving an uncapped pipe even though the supply was turned off was automatic removal. Kitchen ventilation was always a concern if a non flame fail protected hob was in use but it was understood a hob ring blowing out should smell but not reach explosive levels if ventilation was correct. (didn't stop the double glazers and kitchen fitter altering things sice the last gas checks)

Gas Detector recs please
 

Martin Brown wrote:

The only time it might be sensible to have a combustible gas detector
is if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.


I am unable to smell household gas, so it's not that uncommon.
Mix gas with rural or industrial smells and it's difficult.

Gas Detector recs please
 

Capitol wrote:
Martin Brown wrote:

The only time it might be sensible to have a combustible gas detector
is if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.


I am unable to smell household gas, so it's not that uncommon.

I suspect it is actually uncommon. It stinks to high heaven. Can you really
smell nothing?

Tim

Gas Detector recs please
 

"Capitol" wrote in message
o.uk...
Martin Brown wrote:

The only time it might be sensible to have a combustible gas detector is
if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.


I am unable to smell household gas, so it's not that uncommon.

I do wonder whether the guy who sadly died in the Haxby explosion (I heard
the bang from about 10 miles away) may have had the same problem as you and
hence not realised that there was a gas leak... I imagine that the central
heating kicked in at 7:30 after gas had been building up all night to the
explosive gas/air concentration. Worrying that one of the comments on the
York Press web site story was from someone else in Haxby who had discovered
gas leaking from the underground pipes outside her new house when she first
moved in a year or so ago. Is there a problem in the area?

Gas Detector recs please
 

NY wrote:
"Capitol" wrote in message
o.uk...
Martin Brown wrote:

The only time it might be sensible to have a combustible gas
detector is if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.


I am unable to smell household gas, so it's not that uncommon.

I do wonder whether the guy who sadly died in the Haxby explosion (I
heard the bang from about 10 miles away) may have had the same problem
as you and hence not realised that there was a gas leak... I imagine
that the central heating kicked in at 7:30 after gas had been building
up all night to the explosive gas/air concentration. Worrying that one
of the comments on the York Press web site story was from someone else
in Haxby who had discovered gas leaking from the underground pipes
outside her new house when she first moved in a year or so ago. Is
there a problem in the area?

Interesting, if her house was new it would have a plastic feed pipe
I believe. I wonder if it was connected to a plastic or iron gas main?

Gas Detector recs please
 

Tim+ wrote:
wrote:

Martin Brown wrote:

The only time it might be sensible to have a combustible gas detector
is if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.



I am unable to smell household gas, so it's not that uncommon.

I suspect it is actually uncommon. It stinks to high heaven. Can you really
smell nothing?

Tim





Please re read the reply completely.

Gas Detector recs please
 

"Peter Parry" wrote in message
...

On Sat, 20 Feb 2016 14:39:05 -0000, "Bertie Doe"
wrote:

. Ideally I would
like one that you could permanently hang on the wall, similar to the smoke
alarms and powered by a 9v battery. I have lots of re-chargeable 9
volters'.
TIA

http://www.amazon.co.uk/Natural-Gas-.../dp/B00CGZWSIO

http://www.amazon.co.uk/Mercury-350-.../dp/B003B1W3GE

http://www.carbonalarm.co.uk/gas-detectors/

Neither of us have particularly good senses of smell. Even less so, during
the wee hours. The 9v models (above) are the portable ones used by site
engineers.

I'm looking for something with a permanent fixing and say, an 85 Db alarm.
I've come to the conclusion that these types are mains powered. I will have
to bite the bullet and get mains installed in the loft, with alarm placed as
close to the ridge as possible. We'll sleep better. Also these 1840 houses
didn't have much loft ventilation.

Gas Detector recs please
 

Capitol wrote:
Tim+ wrote:
wrote:

Martin Brown wrote:

The only time it might be sensible to have a combustible gas detector
is if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.



I am unable to smell household gas, so it's not that uncommon.

I suspect it is actually uncommon. It stinks to high heaven. Can you really
smell nothing?

Tim





Please re read the reply completely.


I have. The stink of gas with its stenching agents is pretty unmistakable.
Can you really not tell the difference between gas and cow ****?

Tim

Gas Detector recs please
 

Bertie Doe wrote:

I will have to bite the bullet and get mains installed in the loft,
with alarm placed as close to the ridge as possible.

Rather than a new circuit, can you access the top floor lighting circuit
from the ceiling roses? Alarms are hardly going to be a high current item.

Gas Detector recs please
 

"Andy Burns" wrote in message
o.uk...

Bertie Doe wrote:

I will have to bite the bullet and get mains installed in the loft,
with alarm placed as close to the ridge as possible.

Rather than a new circuit, can you access the top floor lighting circuit
from the ceiling roses? Alarms are hardly going to be a high current item.

Yes the rose is next to the hatch. The loft isn't fully boarded. It's just a
question of removing 2 screws and lifting a plank.

I guess the ceiling rose may also provide a 40w light which would be handy?

Gas Detector recs please
 

Bertie Doe wrote:

the rose is next to the hatch. The loft isn't fully boarded. It's just a
question of removing 2 screws and lifting a plank.

I guess the ceiling rose may also provide a 40w light which would be handy?

Yes.

For the alarms, fit them to FCUs rather than 13A sockets, which will A)
prevent the alarms accidentally getting unplugged and B) prevent someone
using a 3kW heater on the lighting circuit. Label it accordingly.

Gas Detector recs please
 

Tim+ wrote:
wrote:

Tim+ wrote:

wrote:


Martin Brown wrote:


The only time it might be sensible to have a combustible gas detector
is if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.




I am unable to smell household gas, so it's not that uncommon.


I suspect it is actually uncommon. It stinks to high heaven. Can you really
smell nothing?

Tim





Please re read the reply completely.


I have. The stink of gas with its stenching agents is pretty unmistakable.
Can you really not tell the difference between gas and cow ****?

Tim





I can smell the cow ****, not the gas. Peoples ability to detect
and diiferentiate smells decreases with age and lifestyle. Over 70 there
is a an even more marked degradation and these people are advised to fit
flammable gas detecors.

Gas Detector recs please
 

"Capitol" wrote in message
o.uk...
I have. The stink of gas with its stenching agents is pretty
unmistakable.
Can you really not tell the difference between gas and cow ****?

I can smell the cow ****, not the gas. Peoples ability to detect and
diiferentiate smells decreases with age and lifestyle. Over 70 there is a
an even more marked degradation and these people are advised to fit
flammable gas detecors.

What about dog ****? Can you smell that? Because as I understand it, it is
the same mercaptans which give both dog **** and the stenching agent in
natural gas their characteristic and (to most people) very pungent aromas.

It's interesting that a stenching agent which has been chosen because it is
detectable in exceptionally low concentrations is not detectable by some
people.

Could you smell gas when you were younger, or have you never been able to
smell it?

Did town/coal gas have sufficient smell of its own not to need a stenching
agent? I'm just slightly too young to remember coal gas: I was probably a
few years old when our area got "North Sea gas" - too young to remember what
its predecessor was like. I can remember the sulphurous (H2S) smell from a
gasworks (I can remember we used to go past one on the M1 somewhere near
Sheffield), but I think that was a by product, not the smell of the gas
itself. And it was nowhere near as all-pervading as the mercaptans added to
natural gas.

Gas Detector recs please
 

NY wrote:
"Capitol" wrote in message
o.uk...
I have. The stink of gas with its stenching agents is pretty
unmistakable.
Can you really not tell the difference between gas and cow ****?

I can smell the cow ****, not the gas. Peoples ability to detect
and diiferentiate smells decreases with age and lifestyle. Over 70
there is a an even more marked degradation and these people are
advised to fit flammable gas detecors.

What about dog ****? Can you smell that? Because as I understand it,
it is the same mercaptans which give both dog **** and the stenching
agent in natural gas their characteristic and (to most people) very
pungent aromas.

It's interesting that a stenching agent which has been chosen because
it is detectable in exceptionally low concentrations is not detectable
by some people.

Could you smell gas when you were younger, or have you never been able
to smell it?

Did town/coal gas have sufficient smell of its own not to need a
stenching agent? I'm just slightly too young to remember coal gas: I
was probably a few years old when our area got "North Sea gas" - too
young to remember what its predecessor was like. I can remember the
sulphurous (H2S) smell from a gasworks (I can remember we used to go
past one on the M1 somewhere near Sheffield), but I think that was a
by product, not the smell of the gas itself. And it was nowhere near
as all-pervading as the mercaptans added to natural gas.

Never tried to smell dog ****! I could smell both town gas and
natural gas until a few years ago. In high concentrations I can smell
natural gas, but they have to be quite high, It seems to be a
sensitivity problem centred on mercaptans. Smell apparently is located
in the sinuses, so sinus nerve damage is indicated. People with colds
frequently lose their sense of smell. There are only a few super
sniffers who can detect cyanide gas AIUI.

Gas Detector recs please
 

"Capitol" wrote in message
o.uk...

Martin Brown wrote:

The only time it might be sensible to have a combustible gas detector is
if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.


I am unable to smell household gas, so it's not that uncommon. Mix
gas with rural or industrial smells and it's difficult.

Difficult to know how many (domestic) gas explosions there are pa. A lot of
elderly folk will set their GCH timers early, perhaps before getting out of
bed.

With the bedroom door closed and whilst asleep, they may not smell the gas.
I'm retired but I seriously think it's worth having one in kitchen another
in the loft, for peace of mind.

Gas Detector recs please
 

Bertie Doe wrote:

Difficult to know how many (domestic) gas explosions there are pa.

HSE stats show between 1994 and 2004 show an average of about 35 gas
fires/explosions per year with fatalities tailing-off to a low of 2 in
2004. I can't find more a recent report

http://www.hse.gov.uk/gas/domestic/frontlinefinal.pdf

A lot of elderly folk will set their GCH timers early, perhaps before
getting out of bed.

Doesn't everyone?

With the bedroom door closed and whilst asleep, they may not smell the gas.
I'm retired but I seriously think it's worth having one in kitchen another
in the loft, for peace of mind.

Presumably you've already got CO detectors? It's several times more
likely to kill you ...

Gas Detector recs please
 

Andy Burns wrote:

fires/explosions per year with fatalities tailing-off to a low of 2 in
2004. I can't find more a recent report

gas fire/explosion fatality figures for recent years
http://www.hse.gov.uk/statistics/tables/ridgas1.xlsx

2010/11, 2011/12, 2012/13, 2013/14, 2014/15
3 1 1 3 0

Gas Detector recs please
 

On 20/02/2016 21:39, Tim+ wrote:
Capitol wrote:
Martin Brown wrote:

The only time it might be sensible to have a combustible gas detector
is if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.

I am unable to smell household gas, so it's not that uncommon.

I suspect it is actually uncommon. It stinks to high heaven. Can you really
smell nothing?

Some people can't. My great aunt was nearly killed by a towns gas leak
as she had no sense of taste or smell at all. Everything tasted like
cardboard to her - she could only distinguish textures in food.

My dad could smell it and called the gas board. It was a serious leak.

--
Regards,
Martin Brown

Gas Detector recs please
 

On 21/02/2016 12:10, Capitol wrote:

frequently lose their sense of smell. There are only a few super
sniffers who can detect cyanide gas AIUI.

If you don't smell it quickly enough then it takes out the nerves - the
same is also true of hydrogen sulphide.

From my friends in the electroplating business I was told if you have
smelled hydrogen cyanide and are still alive 15 minutes later then you
got away with it. The plating baths sometimes emitted a bit when the
chemistry wasn't quite right. This was in the pre H&S days...

--
Regards,
Martin Brown

Gas Detector recs please
 

On Sun, 21 Feb 2016 14:30:27 +0000, Martin Brown
wrote:

On 20/02/2016 21:39, Tim+ wrote:
Capitol wrote:
Martin Brown wrote:

The only time it might be sensible to have a combustible gas detector
is if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.

I am unable to smell household gas, so it's not that uncommon.

I suspect it is actually uncommon. It stinks to high heaven. Can you really
smell nothing?

Some people can't. My great aunt was nearly killed by a towns gas leak
as she had no sense of taste or smell at all. Everything tasted like
cardboard to her - she could only distinguish textures in food.

My MIL used to have her meals 50:50 food / salt because she couldn't
taste anything without.

My dad could smell it and called the gas board. It was a serious leak.

I'm lucky (in some respects) in that I can generally smell the
slightest whiff of stuff, from someone smoking pot in the car in front
to the gas on on a ring (even on low) but not lit.

The Mrs / daughter even have to put perfume (and it's good stuff I'm
told) on on the way out of the house as the smell (or 'fumes' as I
smell them g) often start me coughing. ;-(

It was the same sensitivity to 'fumes' that used to make me puke as a
kid if Dad lit a cigar whilst driving ...

Cheers, T i m

Gas Detector recs please
 

On Saturday, 20 February 2016 14:39:53 UTC, Bertie Doe wrote:
The first question my wife asked in the aftermath of the awful gas explosion
earlier was "Have we got a GD in the house?"

http://www.bbc.co.uk/news/uk-england...shire-35610607

We live in an old 2-up-2-down terrace. In the (extended) kitchen, there's a
Baxi combi boiler, installed 12 years ago to provide GCH.

The (Town) gas supply was routed thru the loft. A quick google shows that
town gas (rotten eggs) is lighter than air. In my case I will need a GD near
the kitchen ceiling and another one, high in the loft. Fitting a mains one
in the kitchen is fine but problem is, I have no electrics in the loft and
the one's I've spotted on an Ebay search, all need mains power :-

http://www.ebay.co.uk/sch/i.html?_fr..._ipg=200&rt=nc

Most of these are the portable one's use by Gas Board bods. Ideally I would
like one that you could permanently hang on the wall, similar to the smoke
alarms and powered by a 9v battery. I have lots of re-chargeable 9 volters'.
TIA

The bes thing you can do is to ensure that all places a gas pipe passes through are ventilated to prevent gas accumulations.

Gas Detector recs please
 

"harry" wrote in message
...
On Saturday, 20 February 2016 14:39:53 UTC, Bertie Doe wrote:
The first question my wife asked in the aftermath of the awful gas
explosion
earlier was "Have we got a GD in the house?"

http://www.bbc.co.uk/news/uk-england...shire-35610607

We live in an old 2-up-2-down terrace. In the (extended) kitchen, there's
a
Baxi combi boiler, installed 12 years ago to provide GCH.

The (Town) gas supply was routed thru the loft. A quick google shows that
town gas (rotten eggs) is lighter than air. In my case I will need a GD
near
the kitchen ceiling and another one, high in the loft. Fitting a mains
one
in the kitchen is fine but problem is, I have no electrics in the loft
and
the one's I've spotted on an Ebay search, all need mains power :-

http://www.ebay.co.uk/sch/i.html?_fr..._ipg=200&rt=nc

Most of these are the portable one's use by Gas Board bods. Ideally I
would
like one that you could permanently hang on the wall, similar to the
smoke
alarms and powered by a 9v battery. I have lots of re-chargeable 9
volters'.

The bes thing you can do is to ensure that all places a gas pipe
passes through are ventilated to prevent gas accumulations.

Makes a lot more sense to have mains powered gas sensors where the gas can
accumulate.

Gas Detector recs please
 

"hgww" wrote in message ...
"harry" wrote in message
...
On Saturday, 20 February 2016 14:39:53 UTC, Bertie Doe wrote:

Most of these are the portable one's use by Gas Board bods. Ideally I
would
like one that you could permanently hang on the wall, similar to the
smoke
alarms and powered by a 9v battery. I have lots of re-chargeable 9
volters'.

The bes thing you can do is to ensure that all places a gas pipe
passes through are ventilated to prevent gas accumulations.

Makes a lot more sense to have mains powered gas sensors where the gas can
accumulate.

We cook on electric and the Baxi is mounted in the (extended) kitchen. The
GCH is switched on/off manually as needed. No intention of fixing an alarm
in the kitchen, as the Baxi is well sealed and flued.

As you know, combustible gas rises and my main concern is the loft (where
the gas pipes are situated). I'm going to follow Andy's suggestion and get
an electrician mate to tap into the ceiling rose and install a 40w bulb
(handy) and hard wire in one of these http://tinyurl.com/zuw4u5u OR similar.

The house next door has just had the (extended) kitchen demolished by a
builder (not explosion). He's just removed all the Mundik block and is
likely to be onsite for at least 7 weeks. Our suffits' are already
ventilated but I'm going to ask his advice on ventilating tiles or ridge. If
the price is right .......
http://www.fixmyroof.co.uk/roof-vents/#dry%20ridge
--

Gas Detector recs please
 

On Saturday, 20 February 2016 22:24:55 UTC, Tim+ wrote:
Capitol wrote:
Tim+ wrote:
wrote:

Martin Brown wrote:

The only time it might be sensible to have a combustible gas detector
is if the householder has absolutely no sense of smell.

Very few people are unable to smell mercaptans at the level they are
added to mains gas so I don't think it is worth worrying about.



I am unable to smell household gas, so it's not that uncommon.

I suspect it is actually uncommon. It stinks to high heaven. Can you really
smell nothing?

Tim





Please re read the reply completely.


I have. The stink of gas with its stenching agents is pretty unmistakable..
Can you really not tell the difference between gas and cow ****?

Tim

Occasionaly I thought I could smell gas, but on two seperate occasions when the meter reader turned up he couldn't smell gas.
So for the 3 or so weeks before my meter was due to be read I nevr opened the cupboard where the gas meter was. The on teh next reading he smelt gas and called wjoever out as a gas leak.
Friends said they could smell gas, but both have a very good sense of smell they think it's because they are vegitarian, they can smell chip fat that's usues animal oli from across the street. SO I do belive differnt people have difernt sensitivities, to smells.

Gas Detector recs please
 

On Monday, 22 February 2016 08:17:02 UTC, hgww wrote:
"harry" wrote in message
...
On Saturday, 20 February 2016 14:39:53 UTC, Bertie Doe wrote:
The first question my wife asked in the aftermath of the awful gas
explosion
earlier was "Have we got a GD in the house?"

http://www.bbc.co.uk/news/uk-england...shire-35610607

We live in an old 2-up-2-down terrace. In the (extended) kitchen, there's
a
Baxi combi boiler, installed 12 years ago to provide GCH.

The (Town) gas supply was routed thru the loft. A quick google shows that
town gas (rotten eggs) is lighter than air. In my case I will need a GD
near
the kitchen ceiling and another one, high in the loft. Fitting a mains
one
in the kitchen is fine but problem is, I have no electrics in the loft
and
the one's I've spotted on an Ebay search, all need mains power :-

http://www.ebay.co.uk/sch/i.html?_fr..._ipg=200&rt=nc

Most of these are the portable one's use by Gas Board bods. Ideally I
would
like one that you could permanently hang on the wall, similar to the
smoke
alarms and powered by a 9v battery. I have lots of re-chargeable 9
volters'.

The bes thing you can do is to ensure that all places a gas pipe
passes through are ventilated to prevent gas accumulations.

Makes a lot more sense to have mains powered gas sensors where the gas can
accumulate.

Rubbish.
Any active sensor can fail.
The best rule is KISS. Keep It Stupid Simple.
It's what's in the regulations anyway.

Gas Detector recs please
 

"harry" wrote in message
...
On Monday, 22 February 2016 08:17:02 UTC, hgww wrote:
"harry" wrote in message
...
On Saturday, 20 February 2016 14:39:53 UTC, Bertie Doe wrote:
The first question my wife asked in the aftermath of the awful gas
explosion
earlier was "Have we got a GD in the house?"

http://www.bbc.co.uk/news/uk-england...shire-35610607

We live in an old 2-up-2-down terrace. In the (extended) kitchen,
there's
a
Baxi combi boiler, installed 12 years ago to provide GCH.

The (Town) gas supply was routed thru the loft. A quick google shows
that
town gas (rotten eggs) is lighter than air. In my case I will need a
GD
near
the kitchen ceiling and another one, high in the loft. Fitting a mains
one
in the kitchen is fine but problem is, I have no electrics in the loft
and
the one's I've spotted on an Ebay search, all need mains power :-

http://www.ebay.co.uk/sch/i.html?_fr..._ipg=200&rt=nc

Most of these are the portable one's use by Gas Board bods. Ideally I
would
like one that you could permanently hang on the wall, similar to the
smoke
alarms and powered by a 9v battery. I have lots of re-chargeable 9
volters'.

The bes thing you can do is to ensure that all places a gas pipe
passes through are ventilated to prevent gas accumulations.

Makes a lot more sense to have mains powered gas sensors where the gas
can
accumulate.

Rubbish.
Any active sensor can fail.

That's why I said SENSORS, ****wit.

The best rule is KISS. Keep It Stupid Simple.

Wrong, as always.

And nothing complicated about multiple sensors anyway.

It's what's in the regulations anyway.

More fool the regulations.

Your nanny state has never had a ****ing clue,
most obviously with power points in the bathroom.

Gas Detector recs please
 

"Rod Speed" wrote in message ...

"harry" wrote in message
...
On Monday, 22 February 2016 08:17:02 UTC, hgww wrote:

Makes a lot more sense to have mains powered gas sensors where the gas
can accumulate.

Rubbish.
Any active sensor can fail.

That's why I said SENSORS, ****wit.

It was hgww who said "SENSORS"
How many socks do you troll under, ****wit?

Gas Detector recs please
 

On Sunday, 21 February 2016 13:16:33 UTC+1, Capitol wrote:
NY wrote:
"Capitol" wrote in message
o.uk...
I have. The stink of gas with its stenching agents is pretty
unmistakable.
Can you really not tell the difference between gas and cow ****?

I can smell the cow ****, not the gas. Peoples ability to detect
and diiferentiate smells decreases with age and lifestyle. Over 70
there is a an even more marked degradation and these people are
advised to fit flammable gas detecors.

What about dog ****? Can you smell that? Because as I understand it,
it is the same mercaptans which give both dog **** and the stenching
agent in natural gas their characteristic and (to most people) very
pungent aromas.

It's interesting that a stenching agent which has been chosen because
it is detectable in exceptionally low concentrations is not detectable
by some people.

There are some people with ZERO sense of smell, not no stenching agent
could be 100% effective.

Could you smell gas when you were younger, or have you never been able
to smell it?

Did town/coal gas have sufficient smell of its own not to need a
stenching agent? I'm just slightly too young to remember coal gas: I
was probably a few years old when our area got "North Sea gas" - too
young to remember what its predecessor was like. I can remember the
sulphurous (H2S) smell from a gasworks (I can remember we used to go
past one on the M1 somewhere near Sheffield), but I think that was a
by product, not the smell of the gas itself. And it was nowhere near
as all-pervading as the mercaptans added to natural gas.

According to wp, town gas was typically Hydrogen/Methane/Carbon Monoxide (at 10% !)/Ethylene. Of course the source coal wasn't particularly
sulpher free, so there was enough H2S et al to make it smell.

North Sea Gas also isn't pure methane, but the composition is *very*
variable so a decision was made to add a smell.

Never tried to smell dog ****! I could smell both town gas and
natural gas until a few years ago. In high concentrations I can smell
natural gas, but they have to be quite high, It seems to be a
sensitivity problem centred on mercaptans. Smell apparently is located
in the sinuses, so sinus nerve damage is indicated. People with colds
frequently lose their sense of smell. There are only a few super
sniffers who can detect cyanide gas AIUI.

I thought that most people can detect cyanide at sufficiently high
concentrations. The trouble is that this is close to (or above)
lethal concentrations ...