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color
Color (American English) or colour (Commonwealth English) is the visual perceptual property corresponding in humans to the categories called blue, green, red, etc. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects or materials based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space colors can be identified numerically by their coordinates.
Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.
The science of color is sometimes called chromatics, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what is commonly referred to simply as light).
I have a Wirsbo (Uponor) underfloor heating system installed in my bungalow in 1999/2000 using two Wirsbo area packs. This was later upgraded by installing electric actuators and wireless thermostats in each room. However I have noticed recently that two of the rooms are not getting warm...
Hi there,
I think my pump is on its way out and want to replace it before winter hits.
It is not a recognised brand or model number so I am struggling to understand the type of pump I need to buy for a like for like replacement. There are some numbers in a table on the head but I don't know...
Hi there,
I ordered some items for a job on Saturday (Temperature/commisioning items ect) on Tues morning, expecting the package to be at my house Fri late Saturday morning.
After phoning the 0800 690 6404 this morning, just to check on delivery dates ect. I was told the courier may collect...
Hi I have read about thermal store but I don't understand if:
1. Can I use it with a "conventional" boiler and no other form of heat provision?
2. Is it an efficient way to have mains pressure domestic water?
Thanks
damaan
Thread
boiler
color
combi
store
thermal
thermal store
verdana
water
Hello everyone,
I need to change my boiler and I am very confused. I don't know very much about boilers and which one is best for me and my family and so I decided to get several quote - very wise! I have a 4 bed 2 bathroom house with a conventional boiler and tank in an airing cupboard. It...
damaan
Thread
boiler
change
color
confused
house
oil
pressure
water
I need to repair this broken 40mm pipe which has broken off of the 40mm boss. Not quite sure of the best way to go here but I understand that these items are pretty useful but would removing the existing strap-boss prevent a straightforward installation. I guess the other option would be to...
I have had a few issues recently with my boiler (see my previous threads) but the one which is niggling me most is a trv I have fitted onto a new radiator. Essentially, I have replaced an old radiator with a new slightly larger radiator. The old one worked perfectly. When the heating kicks in...
Hi there..
So, after flushing my boiler system to release what appears to have been an airlock in some pipework (had a very satisfying splutter and huge surge of black muck out of the drain valve) for my new radiator...(previous thread), I have today gone and bought some Central heating...
dougie212
Thread
after
airlock
boiler
color
firing
help
not firing
oil
please
refill
system
Where can I get hold of a boss (double Socket –same side) 110mm x 40mm
I've goggled this and can't one.
Like this (I photo shopped this picture)
https://1drv.ms/i/s!AlXOOGaTv36QgQuVPv22GNk2dCzK
Hi all,
boiler did the same 2 years ago but corrected itself before I had time to investigate
i have an icos he15 in the kitchen, which is working ok, but when the hot water or heating stops being called for , the "c" is still displayed on the boiler, and the burner light flashes slowly
The...
M2RTY
Thread
boiler
color
icos
ideal
turn off
valve
won't
you're
I am bedevilled by toilet seats which come loose and slip to one of the WC basin. I have many complaints from the family, but buying new seats and tightening them up on the screws provided doesn't seem to work for me. They still end up loosening, repeatedly.:disappointed:
Any ideas?
Bit of a tricky one. The stop tap in pavement is very old and does nothing. Water co says 10 months to come out and replace!!! The stop tap inside the Victorian house is under an access panel in floor inside front door as the tap is in void under ground floor. The pipe from under garden is lead...
Hi all,
I have posted a similar question 1 week ago in a different thread, but I cannot continue the discussion there as it's already closed.
I have an Ideal Icos HE12 boiler that is operating correctly, but in the last few weeks has been doing some weird banging/clicking noise and I'm a bit...
We have a leaking shower head which think may need a new cartridge however struggling to identify manufacturer of concealed shower unit.
I have attached a couple of pictures one which includes a manufacturer logo. Don't want to open it up to remove cartridge yet as will still be under warranty...
Hi,
Looking for some advice if I may as to what is wrong and how to correct the problem I'm having with my Lifestyle LP522 programmer.
When we have a power cut, both the hw and ch default to the 'twice' option when power is restored.
We've been having a couple of power cuts lately and been...
Trevor Hunt
Thread
after
battery
color
default
lp522
power
programmer
twice
Regular contributors to the forum will know that a common question is "whats the best boiler..."
The same question also comes up on countless other forums, and on facebook etc.
They often produce long threads as installers with particular preferences make claims for their preferred models with...
Where doI stand?....
Almost 6weeks ago I got a new combi boiler upgraded from an old gravity fed system.
Theinstaller quoted me a price of **** for the job. Said he would prefer to do thewhole job in 1 day. He came out and worked through completing most of the job butdid not complete the...
I am converting a stone barn with 4 washrooms to fit and a remote boiler ( 3 Ph electric due to an abundance of solar power) I intended to fit a hot water loop system, however on aquiring the required PB barrier pipe (polyplumb) i find that the application notes for this product say under no...
windycol
Thread
color
pex
quite
right
something
system
temperature
water
Hi Guys,
I am changing some of my house pipes. I had a quote of 2.5k for changing few pipes and joining them using solder fitting.
I am competent enough to lay the pipes and use yorkshire fitting which has the solder ring in it. All that is needed is heat to release it .
I have managed to...
stranger12
Thread
color
pipes
solder
soldering
verdana
water
water pipes
Looking to upgrade with s type control pack to control hw and rads separate.
trying to determine the differences between control packs for vented and un-vented systems. but not sure why some packs are listed as vented and others un vented while the components in the packs appear to be the...
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