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frost
Frost is a thin layer of ice on a solid surface, which forms from water vapor in an above-freezing atmosphere coming in contact with a solid surface whose temperature is below freezing, and resulting in a phase change from water vapor (a gas) to ice (a solid) as the water vapor reaches the freezing point. In temperate climates, it most commonly appears on surfaces near the ground as fragile white crystals; in cold climates, it occurs in a greater variety of forms. The propagation of crystal formation occurs by the process of nucleation.
The ice crystals of frost form as the result of fractal process development. The depth of frost crystals varies depending on the amount of time they have been accumulating, and the concentration of the water vapor (humidity). Frost crystals may be invisible (black), clear (translucent), or white; if a mass of frost crystals scatters light in all directions, the coating of frost appears white.
Types of frost include crystalline frost (hoar frost or radiation frost) from deposition of water vapor from air of low humidity, white frost in humid conditions, window frost on glass surfaces, advection frost from cold wind over cold surfaces, black frost without visible ice at low temperatures and very low humidity, and rime under supercooled wet conditions.Plants that have evolved in warmer climates suffer damage when the temperature falls low enough to freeze the water in the cells that make up the plant tissue. The tissue damage resulting from this process is known as "frost damage". Farmers in those regions where frost damage is known to affect their crops often invest in substantial means to protect their crops from such damage.
Does anybody know if you can turn off or adjust the frost protection on a Vaillant Ecotec? All the pipeworks in doors with no chance of freezing, the boilers on the wall in the garage attached to the house and never gets below 2 degrees and the system has anti freeze in it so no chance of...
Hi, can anyone help me to adjust my honeywell frost stat .
It has the round tamper proof cover to protect "adjustment" but I believe mine is set too high as CH coming on all night at present.
How do you remove the tamper proof cover to adjust the setting down a notch or two ?
Thanks.
Button216
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Anyone know of a volt free frost stat? Need one for a ravenheat combi in a loft. the boiler only takes volt free controls. Can't find one on the internet!
PlumbingSucks
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And failing that how cold does it need to be before frost stat would open valve slightly...?
Can you fit a cap to keep the valve closed after removing the rad or will taking the TRV head off open the valve?
Hi Folks,
has anyone ever experienced a 22mm poly straight on a low pressure system (0.1 bar) to be affect by frost in such a way that the copper pipe slips out of the retaining ring but stays in the oring, the fitting in question was completely wrapped in 9mm armaflex and taped with...
keithkbs
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copper
damage
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Hello everyone.
I have got an ongoing problem with my Honeywell FrostStat on my central heating. This is the third new thermostat to go out of calibration. It starts out bang on when fitted but gradually gets increasingly inaccurate until when it is set to 1 degree it is actually clicking on...
cornishpasty
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boiler
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drayton
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plumber
plumbers
problem
system
temperature
wall
HI all
I have an 8' by 10' greenhouse that I'd like to keep frost free. Having battled with filthy parafin last year I'm wondering if it's feasible to rig up a wet heating system powered by a solar panel (s) in the garden. Could I use a couple of old radiators lurking at the back of my garage...
moorer
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ContractorForum: Dewalt D24000 and Frost, Beware: I got it out of the van and set her up this morning ( I left the water tray on.. http://bit.ly/6hXboZ
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Hi all,
i have a vaillant ecotec Plus boiler in my garage,now with the cold weather the frost protection is working, but i dont want it too,cant afford it,with temps of 5 and below the damn heating is running all day and night even tho the room temp is 19c what it should be and NOT requiring the...
The Rig
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