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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).
Hello all
I wonder if anyone has any idea what might be ailing my boiler? This requires quite an explanation for afirst post, so congrats to anyone who gets to the end!
So, I have a Worcester Bosch 30 Si Compact boiler, installed just lessthan a year ago by a reputable Gas-Safe registered...
A plumber has recently been filmed battling with a ridiculous amount of water flooding from a pipe. He appears helpless when trying to solve the issue as the room begins to fill with water. Someone even tries to help him out by hoovering up the excess amount of water that is flowing out of the...
Hi All
I have an unvented Megaflo hot water tank and ecoTEC plus Vaillantboiler. I also have a traditional exposed shower by Bristan 1901 range.
In the mornings whenthe shower valve is turned to activate the water flow the chrome pipe that isattached overhead to the showerhead briefly judders...
I could do with some advice please.
My bath has an overflowand plug, which lifts when you turn a handle. Not particularly unusual, I know.
The handle has stopped twisting, meaning I can’t lift theplug. For a long time the handle didn’t lower the plug (I just pushed it down)but now it won’t go...
Howdoi?
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broken
cable
calibri
color
handle
help
mechanism
please
plug
Hi,
This is my first post, and I have a genuine issue so hoping for some assistance.
I am based in Edinburgh and about 7 or 8 years ago, I commissioned a guy to carry out a number of jobs on a conversion of my flat from a 1 to a 2 bed property. I paid him cash. Though he did a good job, it...
Hi there,
The 21 year old boiler (Worcester Bosch 350) has failed in my first floor, small one bedroom flat which has concrete floors throughout. My existing boiler is in a cupboard at the back of my lounge next to an outside wall. The flow and return pipes come out here too (I think they run...
munchkin19
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bathroom
boiler
color
condensate
condensate pipe
external
help
lounge
permission
pipe
Hi,
I have looked on this site for the answer to this question but couldn't find it.
My hot water pressure feels like its getting low.
System is 7 years old and has never been touched apart from the normal yearly gas cert.
All system is outside.
I wondered if it was to do with internal air...
nodyland
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air
bubble
color
combination
megaflow
refill
tank
valve
water
Hello everyone,
I'm very puzzled with an error I have on my turbomax plus 824E,
I would really appreciate if you could share your thoughts.
I'm looking for a plumber or gas engineer advice.
I have an intermittent F22 error.
The pressure is around 1.4bar.
The pump seems to be rotating ok...
I moved into my present 1990-built home just over a yearago. A British Gas (Potterton) non-condensingboiler was installed a year or so before I bought the property. All the rads have TRVs and there wasoriginally just a time-switch for boiler control. Despite recently installing a...
Hi
I have a Grant Euroflame 90/120 Kitchen/utility boiler and I think I’ve worked out how it works.
The boiler is outside in a shed.
There’s a standard 3 wire mains power cord going into it (no other wires).
4 pipes coming out, 2 heats the centre heating, 2 heats the hot water.
There’s 1...
Does anyone recognise the make (& ideally also model) of this TRV?
I'm trying to fit a controller to it. It doesn't work with the Pegler Terrier i-temp i30 Programmable Thermostatic Radiator Valve
The government published their response to the RHI consultation today, and generally its good news for small systems
ASHP - capped at 20,000 kWh gross tariff to rise to 10.02p/kWh
GSHP - capped at 30,000 kWh gross tariff to rise to 19.55p/kWh
Biomass - capped at 25,000 kWh gross tariff to rise...
All,
I know there are a lot of threads on this forum, on a number of other forums and also videos on YouTube but I have found little information on this specific install and the information I have found has been confusing and sometimes contradictory.
I have just had a Vaillant Ecotec Pro 30...
I need to touch-up a tiny area of an enamel bath (about the size of a 20p coin). Is there any product available that I could obtain that would allow the bath to be used within a few hours of application? I have bought some EVERBUILD STICK 2 but this requires a 24hr period before being dry. I...
Good morning!
I have a problem with my central heating system…..and am wondering if anyone can help.
The system:
1. 15 year old detached house, with a 15 yr old Honeywell Y Plan CH system, which to all extents and purposes works FINE.
2. Boiler is a traditional ‘IDEAL Classic’ boiler...
vintageaxeman
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color
faulty
help
helvetica
system
traditional
valve
wanted
y plan
Hi All,
Hoping someone can help....The hot surface igniter keeps burning out.
I've just tested a new one, I'm getting approx 170VAC which drops to 120VAC once the burner has lite but it seems the PCB is not switching the igniter off. I've left the boiler running for 3-4 minutes and there's...
Any ideas as to what can be done to reduce the impact of induced syphonage in this situation?
One badly designed (too long) 40mm wastepipe is used for the bath, basin and kitchen-sink. Inevitably there is a good deal of gurgling when, say, the kitchen sink is drained as it ‘pulls’ noticeably on...
Hello
I have a L641B1004 pipe Frost Stats andit was set at 25c in conjunction with a wall frost stat set at 5c.
But its been going on/off every night afew times keeping me awake (I Know it has been cold these past few nights). Itis for a Glow-worm flexicom 15k which is in the Garage. Is it...
Hello,
Had a boiler upgrade installed this summer from old gravityfed system to combi boiler (Worcestre Bosch compact). Had boiler relocated to loft. Installer saidit could be done and would meet requirements. Now had GS inspection (really brilliantguy) who checked everything but said that the...
I need some advice on how our hot water is setup please, I am a total novice when it comes to this area of our house.
I have attached some pictures of our hot water tank and theswitch boxes attached to it.
Could somebody please advise on how this setupworks so I know what to look for if I get...
Martin.R
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advice
attach
calibri
color
hot
hot water
setup
switch
tank
water
water tank
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