Kw (Hs)

21:26 Jan 26, 2010 

...or hertzs. They aren't all famous blokes: eg Curie. There may be other famous women, but none comes to mind at the moment. The Ada programming language is, of course, a tribute to Ada Lovelace.

06:05 Jan 26, 2010 

The *symbol* of the unit named after the famous bloke begins with a capital letter, but when spelt out the unit is all lowercase: hertz, newton, pascal, joule, watt, coulomb, volt, farad, ohm, siemens, weber, tesla, henry, becquerel, gray, sievert, kelvin … (who have I missed?). You may not pluralise the symbol, but you can pluralise the unit name (except that you don't refer to the siemenses).

19:31 Jan 25, 2010 

Yes, that's obvious.
It's also clear that asker's French text and the English text I quoted (which can be found in many UK and US standards docs on the web) do not 'match'; the English specifically refers to 'input heat' (effectively the latent heat of the gas in the cartridge), where as the French text refers to 'puissance calorifique maximum', which is not, IMO, the same thing.

19:25 Jan 25, 2010 

"heat input" in this context does not mean that the device is absorbing heat from the environment. Heat input is the heat power conveyed from the fuel to the device in question, and heat output is the heat power conveyed from the device to the object being heated (e.g. surrounding air).

19:21 Jan 25, 2010 

Note that the English text I just quoted, which is clearly intended to match asker's French text, refers to 'maximum heat *input* of up to 3 kW (Hs)' (* = my emphasis), i.e. heat input when it actually refers to a device (grill, outdoor heater, etc.) that is intended to output heat. In any case, it doesn't quite match asker's "puissance calorifique maximum de 3kW (Hs)", which refers to neither input nor output.

19:16 Jan 25, 2010 

This text, from the ANSI, describes the British Standard version of EN417:
"c) heating appliances. This European Standard only applies to appliances with a maximum heat input of up to 3 kW (Hs) for outdoor use only;"

Regardless of what Hs actually stands for, both ANSI and BSI seem to think it's OK to use in English. (Or maybe they don't understand it any better than we do ...)

http://webstore.ansi.org/RecordDetail.aspx?sku=BS EN 521:200...

19:14 Jan 25, 2010 

Convert kWhs to BTUs:
http://www.ehow.com/how_5589020_convert-kilowatt-hours-btu_s...
I'm no expert that seems to coincide with what appears to be an outdoor grill or heater.

18:37 Jan 25, 2010 

The SI convention for units is always to start the main unit (usually named after some famous bloke) with caps (Mr Watt here). Generally, the multiplier is in caps if greater than 1000 (eg M, G, T etc), so kilo here (1000) is lower case, so Kw is perfectly incorrect (though your pasted text is correct). I suspect the Hs indicates that the useful power is thermal rather than electrical or some other form. "Hors service" is a (very) distant possibility, but that would imply that 3.5kW of power were being absorbed just in keeping pumps and things ticking over. What are these things?
God forbid that it stands for hektoseconds, though that would (as you say) give you an energy and not a power.

18:09 Jan 25, 2010 

Several references on the Weber grill site - showing the format of the EN417 style connector.
Since Weber (and other gas barbecue) grills are meant only for outdoor use, that seems to fit.
http://www.webergrill.no/Files/Filer/NO/Manualer/PERFORMER_(...