EM (or emergency heat) can be used if you have a problem with your other heat source such as a heat pump. In most cases, you will not need this but what it does is bi-passes the primary heat source and allows your secondary heat source (normally your furnace) to become the primary.
The <i> tag in HTML is used to offset text that should be displayed in italics. It's a carry-over from early versions of HTML, as its purpose is solely presentational and not semantic. In most cases, the use of the emphasis tag <em> is encouraged in its place.
The most appropriate element for making a word "stand out" would be to use the emphasis element. <em>This</em> word would be emphasized. Most browsers will automatically turn the emphasized text into italics, but that's not necessarily correct. To be sure, you'll want to include the em element in your CSS. You could also use <strong> in a similar fashion. Strong indicates that the word should be stressed, and most browsers indicate that stressing using bold faced text. Same as with em, however, you'll want to be sure you CSS references that. If neither of those really do it for you, we also have <i></i> and <b></b>, which will cause the text to be italicized or bolded, respectively. The use of these is non-semantic (as they don't describe the data they contain, but merely act as a command on how that data should be presented) but they're available to us again in HTML5. Whether you want to use them or not is up to you. I have found them useful when the format of the text is being done solely for its own sake (for instance, in MLA styled footnotes, where italics and bold do not indicate stress.)
em is the scale of a font size, 1em is the native size (usually 12pt.)for example, with the statement "font-size:2em;", the font will be twice the size, which is quite large.If you use it twice, such as:Hello World!The font size of "Hello World!" will be 3em.other font sizes you can use are pt and px.
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The use of the reverse string in C program is used to reverse the letters in the string. An example would be reverse me would be reversed to em esrever.
Emergency Heat [EM] should only be used as a backup if the heat pump fails. EM heat uses 1.5 to 3 times as much or electricity as the heat pump.
this stands for emergency heat
On a system that uses a Heat pump, the heat setting utilizes the pump, and electrical coil heating as a backup. On the EM setting the heat pump won't run, only the axillary coils will provide heat.
yes it is i am a doctor thats how i know
These two settings are found when you have a heat pump. Using the "Heat" mode uses the heat pump capabilities alone. Using em heat, turns on conventional electric coils to create more heat (and run up your electric bill)
Em ht stands for emergecy heat.
On a thermostat, "EM heating" stands for emergency heating. It heats your house up very quickly, and is costly to run. This is suppose to be used if you've lost heat from your heat pump or if you've turned your thermostat way down and need to heat up your house quickly.
only if it is connected to another heat source such as electric strip heat and are having problems with the heatpump. other wise you will get a big surprise when your utility bill comes in the mail.
If you have a heat pump A/C unit then you have auxillary heat and emergency heat. The EM stands for emergency heat, which is using only your electric heat strips or gas heat, depending on your system. The auxillary heat uses your compressor inside of your outside unit. Say the house is 60 degrees inside and you set your stat to 70, the temperature difference is so great that if the heat pump alone cannot satisfy, then the auxillary heat would come on to assist the heat pump. Say you were to get a leak in either your condenser or evaporator coils, your heat pump would not work on the regular heat setting on the tstat. In this circumstance you would want to use just the emergency heat until a service tech can evaluate the system.
If you need to use it, it would suggest that the outside air changeover thermostat on the outdoor unit is either defective or not set correctly. The Em. Ht. switch simply brings on either the strip heat, or in the case of a dual-fuel application, the furnace, to supplement the heat pumps ability when it gets colder outside. A "Balance Point" calculation will determine what temperature this changeover should occurs at. The calculation involves the intersection point of two lines on a graph. One line represents the increasing btuh needs of the building as the outside temp. decreases. Line #2 represents the output of the heat pump relative to outside air temp. (Output decreases as oa temp. decreases) Operation below the intersection of the lines requires the use of supplemental heat. Acurate setting of the changeover tstat assures high efficiency operation down to the Balance Point and saves you money. lc
'Heat' is the best kind of EM wave to use for warming.
Answerthermostat is wired wrong or something damaged thermostat wires. check where they enter (outdoor) unit. may have abraded on metal edge.Sounds like you have a cooling problem somewhere. The light for EM heat is also what we call a "you have a problem light". Does the outdoor unit run at all? Or does your emergency heat actually kick on, heat out of ducts?yes the blower blowsheat out of ducts