Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough momentum to clear the wind flow over the roof and down the lee-side of
the house. Before itwould be staying elevated before descending somewhat diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy innocent neighbours.
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough
momentum to clear the wind flow over the roof and down the lee-side of
the house. Before itwould be staying elevated before descending somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy
innocent neighbours.
It stops rain getting into the liner.
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough
momentum to clear the wind flow over the roof and down the lee-side of
the house. Before itwould be staying elevated before descending somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy
innocent neighbours.
It stops rain getting into the liner.
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough
momentum to clear the wind flow over the roof and down the lee-side of
the house. Before itwould be staying elevated before descending somewhat >>> diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy >>> innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough
momentum to clear the wind flow over the roof and down the lee-side of >>>> the house. Before itwould be staying elevated before descending somewhat >>>> diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy >>>> innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof
fire prevention/ steam-train anti-smuts summer field-fire-raising sorts
of holes dimension
That just requires just a coarse mesh, not necessarily of thatched-roof
fire prevention/ steam-train anti-smuts summer field-fire-raising sorts
of holes dimension
On 15/03/2025 21:47, Tim+ wrote:
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough >>>>>> momentum to clear the wind flow over the roof and down the lee-
side of
the house. Before itwould be staying elevated before descending
somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately >>>>>> annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof
fire prevention/ steam-train anti-smuts summer field-fire-raising sorts
of holes dimension
Then change it. Why does your chimney stink though? What are you burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the room. That stinks and isn't any fun at all.
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough >>>>> momentum to clear the wind flow over the roof and down the lee-side of >>>>> the house. Before itwould be staying elevated before descending somewhat >>>>> diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy >>>>> innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof
fire prevention/ steam-train anti-smuts summer field-fire-raising sorts
of holes dimension
Then change it. Why does your chimney stink though? What are you burning? I’ve never found wood smoke stinky.
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough momentum to clear the wind flow over the roof and down the lee-side of
the house. Before itwould be staying elevated before descending somewhat diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy innocent neighbours.
Since all smoke is carcinogenic, and they produce as much CO2 as coal, I cannot see the logic of allowing wood burners anyhow.
PS. I can detect the smell of them whenever the wind is in the wrong direction.
On 16/03/2025 00:53, Jim the Geordie wrote:
Since all smoke is carcinogenic, and they produce as much CO2 as coal, I
cannot see the logic of allowing wood burners anyhow.
PS. I can detect the smell of them whenever the wind is in the wrong
direction.
You will find a lot of wood burners in rural areas that don't have mains
gas.
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough >>>>> momentum to clear the wind flow over the roof and down the lee-side of >>>>> the house. Before itwould be staying elevated before descending somewhat >>>>> diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy >>>>> innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof
fire prevention/ steam-train anti-smuts summer field-fire-raising sorts
of holes dimension
Then change it. Why does your chimney stink though? What are you burning? I’ve never found wood smoke stinky.
Tim
On 16/03/2025 00:18, Sam Plusnet wrote:
On 15/03/2025 21:47, Tim+ wrote:Since all smoke is carcinogenic, and they produce as much CO2 as coal, I cannot see the logic of allowing wood burners anyhow.
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with
enough
momentum to clear the wind flow over the roof and down the lee-
side of
the house. Before itwould be staying elevated before descending
somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to
deliberately annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof >>>> fire prevention/ steam-train anti-smuts summer field-fire-raising sorts >>>> of holes dimension
Then change it. Why does your chimney stink though? What are you
burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the
room. That stinks and isn't any fun at all.
PS. I can detect the smell of them whenever the wind is in the wrong direction.
On 15/03/2025 21:47, Tim+ wrote:
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough >>>>>> momentum to clear the wind flow over the roof and down the
lee-side of
the house. Before itwould be staying elevated before descending
somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately >>>>>> annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof
fire prevention/ steam-train anti-smuts summer field-fire-raising sorts
of holes dimension
Then change it. Why does your chimney stink though? What are you burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the room. That stinks and isn't any fun at all.
On 15/03/2025 21:28, N_Cook wrote:
That just requires just a coarse mesh, not necessarily of
thatched-roof fire prevention/ steam-train anti-smuts summer
field-fire-raising sorts of holes dimension
A mesh doesn't stop a nest being made on top of it
Sam Plusnet wrote:
On 15/03/2025 21:47, Tim+ wrote:Leave the door open for a few minutes before lighting the fire. This
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with
enough
momentum to clear the wind flow over the roof and down the
lee-side of
the house. Before itwould be staying elevated before descending
somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to
deliberately annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof >>>> fire prevention/ steam-train anti-smuts summer field-fire-raising sorts >>>> of holes dimension
Then change it. Why does your chimney stink though? What are you
burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the
room. That stinks and isn't any fun at all.
will allow the column of cold air to flow down.
On 16/03/2025 10:45, No mail wrote:
Sam Plusnet wrote:
On 15/03/2025 21:47, Tim+ wrote:Leave the door open for a few minutes before lighting the fire. This
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with >>>>>>>> enough
momentum to clear the wind flow over the roof and down the
lee-side of
the house. Before itwould be staying elevated before descending >>>>>>>> somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to
deliberately annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof >>>>> fire prevention/ steam-train anti-smuts summer field-fire-raising sorts >>>>> of holes dimension
Then change it. Why does your chimney stink though? What are you
burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the
room. That stinks and isn't any fun at all.
will allow the column of cold air to flow down.
I thought the traditional trick, starting from a cold chimney, was to
light a series of single sheets of newspaper before setting the nested newspaper and kindling alight.
Sam Plusnet wrote:
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the room. That stinks and isn't any fun at all.
Leave the door open for a few minutes before lighting the fire. This
will allow the column of cold air to flow down.
On 16/03/2025 00:18, Sam Plusnet wrote:
On 15/03/2025 21:47, Tim+ wrote:Since all smoke is carcinogenic, and they produce as much CO2 as coal, I cannot see the logic of allowing wood burners anyhow.
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough >>>>>>> momentum to clear the wind flow over the roof and down the lee-
side of
the house. Before itwould be staying elevated before descending
somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately >>>>>>> annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof >>>> fire prevention/ steam-train anti-smuts summer field-fire-raising sorts >>>> of holes dimension
Then change it. Why does your chimney stink though? What are you burning? >>> I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the
room. That stinks and isn't any fun at all.
PS. I can detect the smell of them whenever the wind is in the wrong direction.
There is local to me a sort of citizen science project over perhaps 10
sites on house walls, to monitor traffic pollution. 8 raspberry pi particulate detectors per box, polled and transmitted data. All they
seem to pick up is barbecue, bonfire and woodburner emissions.
No mail <nomail@aolbin.com> wrote:
Sam Plusnet wrote:
Leave the door open for a few minutes before lighting the fire. This
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the
room. That stinks and isn't any fun at all.
will allow the column of cold air to flow down.
Surely it will simply be refilled with equally cold air from outside
won't it?
On 16/03/2025 10:45, No mail wrote:
Sam Plusnet wrote:
On 15/03/2025 21:47, Tim+ wrote:Leave the door open for a few minutes before lighting the fire. This
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with >>>>>>>> enough
momentum to clear the wind flow over the roof and down the
lee-side of
the house. Before itwould be staying elevated before descending >>>>>>>> somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to
deliberately annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of
thatched-roof
fire prevention/ steam-train anti-smuts summer field-fire-raising
sorts
of holes dimension
Then change it. Why does your chimney stink though? What are you
burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the
room. That stinks and isn't any fun at all.
will allow the column of cold air to flow down.
I thought the traditional trick, starting from a cold chimney, was to
light a series of single sheets of newspaper before setting the nested newspaper and kindling alight.
On 15/03/2025 21:47, Tim+ wrote:
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough >>>>>> momentum to clear the wind flow over the roof and down the
lee-side of
the house. Before itwould be staying elevated before descending
somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately >>>>>> annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-roof
fire prevention/ steam-train anti-smuts summer field-fire-raising sorts
of holes dimension
Then change it. Why does your chimney stink though? What are you burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the room. That stinks and isn't any fun at all.
On 16/03/2025 10:45, No mail wrote:
Leave the door open for a few minutes before lighting the fire. This
will allow the column of cold air to flow down.
I thought the traditional trick, starting from a cold chimney, was to
light a series of single sheets of newspaper before setting the nested newspaper and kindling alight.
Chris Green wrote:
No mail <nomail@aolbin.com> wrote:Initially, that's what I thought ... but it works. I assume the air in
Sam Plusnet wrote:
Leave the door open for a few minutes before lighting the fire. This
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the >>>> room. That stinks and isn't any fun at all.
will allow the column of cold air to flow down.
Surely it will simply be refilled with equally cold air from outside
won't it?
the flue cools and falls during the night so it's colder than the
outside air.
On 16/03/2025 13:25, No mail wrote:
Chris Green wrote:
No mail <nomail@aolbin.com> wrote:Initially, that's what I thought ... but it works. I assume the air in
Sam Plusnet wrote:
Leave the door open for a few minutes before lighting the fire. This
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the >>>> room. That stinks and isn't any fun at all.
will allow the column of cold air to flow down.
Surely it will simply be refilled with equally cold air from outside
won't it?
the flue cools and falls during the night so it's colder than the
outside air.
No it won't - Chris Green is right. The air inside the flu/chimney will /always/ be warmer than that outside. It will be warmer because the
house is warmer. If it works at all it's much more likely that opening
the stove door allows the "plug" of cold air to be pushed upwards
slightly by the warmer air in the stove and its flu in the room. As
noted above, a few sheets of paper burning fiercely will push the cold
air up the flu much more quickly.
I've now run out of logs and am using Phurnacite left by the previous
owner. I don't like it at all; I can see why it was left...
On 16/03/2025 10:45, No mail wrote:
Sam Plusnet wrote:
On 15/03/2025 21:47, Tim+ wrote:Leave the door open for a few minutes before lighting the fire. This
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with >>>>>>>> enough
momentum to clear the wind flow over the roof and down the
lee-side of
the house. Before itwould be staying elevated before descending >>>>>>>> somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to
deliberately annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of
thatched-roof
fire prevention/ steam-train anti-smuts summer field-fire-raising
sorts
of holes dimension
Then change it. Why does your chimney stink though? What are you
burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the
room. That stinks and isn't any fun at all.
will allow the column of cold air to flow down.
I thought the traditional trick, starting from a cold chimney, was to
light a series of single sheets of newspaper before setting the nested newspaper and kindling alight.
Since all smoke is carcinogenic, and they produce as much CO2 as coal, I
cannot see the logic of allowing wood burners anyhow.
PS. I can detect the smell of them whenever the wind is in the wrong
direction.
There is local to me a sort of citizen science project over perhaps 10
sites on house walls, to monitor traffic pollution. 8 raspberry pi particulate detectors per box, polled and transmitted data. All they
seem to pick up is barbecue, bonfire and woodburner emissions.
On 16/03/2025 09:44, N_Cook wrote:
There is local to me a sort of citizen science project over perhaps 10
sites on house walls, to monitor traffic pollution. 8 raspberry pi
particulate detectors per box, polled and transmitted data. All they
seem to pick up is barbecue, bonfire and woodburner emissions.
This makes sense as most cars have catalytic exhausts and many diesels
have particulate traps and recently adblue so one would expect to see
some benefit.
What would interest me is how these monitors differentiate the transport combustion particulates from biomass burning.
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough momentum to clear the wind flow over the roof and down the lee-side of
the house. Before itwould be staying elevated before descending somewhat diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy innocent neighbours.
On 15/03/2025 19:06, N_Cook wrote:
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough
momentum to clear the wind flow over the roof and down the lee-side of
the house. Before itwould be staying elevated before descending somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy
innocent neighbours.
In summary the shallow cone of a cap must be just for annoying neighbours. The most recent conversion was to a sort of local landmark.
A spinning mirror ball of a sphere of stainless steel a top a chimney,
with anngled flutes so acted like a kids windmill. I assume this was to
stop rain entry, except for the rain falling at just the right time and
angle to pass one of the slits, all other rain would be spun off. Very
rarely would it be seen stationary.
Adding a spin ,vortex, to vertically emerging smoke would, if anything ,
help clearing the roof surface wind. Now its replaced with one of these annoying caps
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 19:06, N_Cook wrote:
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough
momentum to clear the wind flow over the roof and down the lee-side of
the house. Before itwould be staying elevated before descending somewhat >>> diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy >>> innocent neighbours.
In summary the shallow cone of a cap must be just for annoying neighbours. >> The most recent conversion was to a sort of local landmark.
A spinning mirror ball of a sphere of stainless steel a top a chimney,
with anngled flutes so acted like a kids windmill. I assume this was to
stop rain entry, except for the rain falling at just the right time and
angle to pass one of the slits, all other rain would be spun off. Very
rarely would it be seen stationary.
Adding a spin ,vortex, to vertically emerging smoke would, if anything ,
help clearing the roof surface wind. Now its replaced with one of these
annoying caps
The primary purpose of spinning cowls is to increase draught rather than
stop rain entry though that is another benefit.
GH
On 17/03/2025 10:24, Marland wrote:
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 19:06, N_Cook wrote:
Why the near horizontal cap a few inches above the chimney pot top
level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with enough
momentum to clear the wind flow over the roof and down the lee-side of >>>> the house. Before itwould be staying elevated before descending somewhat >>>> diluted , some distance away.
Now the stink flows undiluted down to street level to deliberately annoy >>>> innocent neighbours.
In summary the shallow cone of a cap must be just for annoying neighbours. >>> The most recent conversion was to a sort of local landmark.
A spinning mirror ball of a sphere of stainless steel a top a chimney,
with anngled flutes so acted like a kids windmill. I assume this was to
stop rain entry, except for the rain falling at just the right time and
angle to pass one of the slits, all other rain would be spun off. Very
rarely would it be seen stationary.
Adding a spin ,vortex, to vertically emerging smoke would, if anything , >>> help clearing the roof surface wind. Now its replaced with one of these
annoying caps
The primary purpose of spinning cowls is to increase draught rather than
stop rain entry though that is another benefit.
GH
Which begs the question why replace the spinning cowl with a shallow
cone dome cap?
As the spinner must spin due to setting up a pressure difference at each "blade" like multiple wing aerofoils, perhaps it creats too much
updraught in high wind. Surely then with a mainly enclosed "approved"
log burner you just restrict air intake at the input air regulator.
Even if the rain was vertical , with no gutter to these stupid caps and
no prevailing wind leeside "gargoyle", rain would fall into the
chimneypot as the liner is smaller than the pot. For the usual angled
rain it would just enter the 4 inch or so gap between cap and pot rim.
On 16/03/2025 10:45, No mail wrote:
Sam Plusnet wrote:
On 15/03/2025 21:47, Tim+ wrote:Leave the door open for a few minutes before lighting the fire. This
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with >>>>>>>> enough
momentum to clear the wind flow over the roof and down the
lee-side of
the house. Before itwould be staying elevated before descending >>>>>>>> somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to
deliberately annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched-
roof
fire prevention/ steam-train anti-smuts summer field-fire-raising
sorts
of holes dimension
Then change it. Why does your chimney stink though? What are you
burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the
room. That stinks and isn't any fun at all.
will allow the column of cold air to flow down.
I thought the traditional trick, starting from a cold chimney, was to
light a series of single sheets of newspaper before setting the nested newspaper and kindling alight.
On 16/03/2025 11:10, N_Cook wrote:
On 16/03/2025 10:45, No mail wrote:
Sam Plusnet wrote:
On 15/03/2025 21:47, Tim+ wrote:Leave the door open for a few minutes before lighting the fire. This
N_Cook <diverse@tcp.co.uk> wrote:
On 15/03/2025 21:20, Tim+ wrote:
charles <charles@candehope.me.uk> wrote:
In article <vr4j3d$462a$1@dont-email.me>,
N_Cook <diverse@tcp.co.uk> wrote:
Why the near horizontal cap a few inches above the chimney pot top >>>>>>>>> level, or over the replacement metal tube liner?
Previously any smoke would rise ,unobstructed, vertically with >>>>>>>>> enough
momentum to clear the wind flow over the roof and down the
lee-side of
the house. Before itwould be staying elevated before descending >>>>>>>>> somewhat
diluted , some distance away.
Now the stink flows undiluted down to street level to
deliberately annoy
innocent neighbours.
It stops rain getting into the liner.
And stop Jackdaws filling your chimney with twigs.
Tim
That just requires just a coarse mesh, not necessarily of thatched- >>>>>> roof
fire prevention/ steam-train anti-smuts summer field-fire-raising
sorts
of holes dimension
Then change it. Why does your chimney stink though? What are you
burning?
I’ve never found wood smoke stinky.
Sometimes, before the fire can establish a proper updraught up the
chimney, thick smoke can puther out of the vents of our stove into the >>>> room. That stinks and isn't any fun at all.
will allow the column of cold air to flow down.
Good idea, but there is plenty more up there to replace what's in the
chimney - and haven't you thus established a steady downdraught within
the chimney?
Newspaper??
I thought the traditional trick, starting from a cold chimney, was to
light a series of single sheets of newspaper before setting the nested
newspaper and kindling alight.
I think I can remember that stuff.
(Didn't it have writing on it?)
(Didn't it have writing on it?)
snip <
The primary purpose of spinning cowls is to increase draught rather than
stop rain entry though that is another benefit.
GH
Which begs the question why replace the spinning cowl with a shallow
cone dome cap?
As the spinner must spin due to setting up a pressure difference at each "blade" like multiple wing aerofoils, perhaps it creats too much
updraught in high wind. Surely then with a mainly enclosed "approved"
log burner you just restrict air intake at the input air regulator.
Even if the rain was vertical , with no gutter to these stupid caps and
no prevailing wind leeside "gargoyle", rain would fall into the
chimneypot as the liner is smaller than the pot. For the usual angled
rain it would just enter the 4 inch or so gap between cap and pot rim.
On 17/03/2025 14:20, N_Cook wrote:
snip <
The primary purpose of spinning cowls is to increase draught rather than >>> stop rain entry though that is another benefit.
GH
Which begs the question why replace the spinning cowl with a shallow
cone dome cap?
As the spinner must spin due to setting up a pressure difference at
each "blade" like multiple wing aerofoils, perhaps it creats too much
updraught in high wind. Surely then with a mainly enclosed "approved"
log burner you just restrict air intake at the input air regulator.
Even if the rain was vertical , with no gutter to these stupid caps
and no prevailing wind leeside "gargoyle", rain would fall into the
chimneypot as the liner is smaller than the pot. For the usual angled
rain it would just enter the 4 inch or so gap between cap and pot rim.
I cobbled together my own cowl but I either didn't make the top plate
wide enough or I made the gap between the flue & the top plate too large
as sometimes I find the ashes are damp when I go to empty them.
A lot depends on the wind direction & its strength.
As the wood burner is only used occasionally to allow me to work in my
shed when it's really cold, it doesn't matter too much.
The victorians were excellent at inventing this sort of stuff, but the majority of the country's chimney pots had no gizmos on top. Perhaps
they had more respect for the neighbours and let the hot smoke rise vertically and contribute to general anonymous smog rather than local smog.
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