[USMA:31322] RE: Air conditioning: the BTU is a threat tometriccountries!

[Euric]

It is strange that they would still refer to inch trade name pipe sizes when there is a metric standard description already in existence.   See:  http://www.engineeringtoolbox.com/16_45.html   Note that the metric sizes are more descriptive of the actual pipe size then the inch.  A half-inch pipe is not called 13 mm, but 15 mm as in DN15.  There is no 5/8, so I'm not sure what it would be called.    I once had to evaluate air conditioners for industrial enclosures.  when I sent out specifications, I used only metric units.  Each response returned was only in FFU, and the dreaded BTU was prevalent.  I even asked some how BTU was used since it is an energy unit and air conditioners capacity is measured in an energy rate unit.  some didn't know, others did say it was BTU per hour, but they all used BTU for short and knew what it meant.  Even if I told them it confused me, they said they all understood it well.  when referring to the BTU per hour, they wrote it as BTUh or BTUH but never BTU/h.  When I questioned this practice too, they again told me it was the way it always has been and will never change.  None seemed to favour using SI units, but none made cruel remarks either.    Maybe you in Australia would get farther requesting a change to eliminate the BTU.  It would make sense not to use an FFU when the country is fully metric.    Euric   ----- Original Message ----- From: Brenton To: U.S. Metric Association Sent: Thursday, 2004-10-21 20:23 Subject: [USMA:31319] RE: Air conditioning: the BTU is a threat tometriccountries! RE: BTU   I am currently in the process of installing a ducted air-conditioning system in my parent�s home.  For that reason, I have obtained the manufacturer�s Service Manual, and I noted that there is one reference to BTU in the Australian version.  However, there is not any mention of BTU on their advertising brochure. �See PDF links below�   (I do recall, several years ago that BTU was often referred to in advertising in Australia.)    The remainder of the installation/service manual is predominately metric, even with references to �� and 5/8� refrigeration piping.  On Sunday 24 October, a guy about 22 is coming to connect that refrigeration piping.  I shall ask him some industry related questions, including his knowledge of BTU.  The air-conditioning industry in Australia seems to only refer to refrigeration piping in its hard inch measurement, and not the soft metric.    http://users.tpg.com.au/adsleqcf/aircon.pdf  < Service Manual 1.1Mb   http://users.tpg.com.au/adsleqcf/acbrochure.pdf < Advertising Brochure 1.5Mb   I could not find any reference to BTU on Panasonic�s web site http://panasonic.com.au/products/category.cfm?objectID=104.   Regards, Brenton Conway www.southaustralia.com   From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of H. Maenen Sent: Tuesday, 19 October 2004 00:46 To: U.S. Metric Association Cc: [EMAIL PROTECTED] Subject: [USMA:31305] Air conditioning: the BTU is a threat to metriccountries!   I was just looking on websites about air conditioning and I had to gag. This industry is attempting to impose the BTU on metric countries! Many people who have mever heard of this unit and who buy an air conditioner will be regaled with the BTU in many cases! I have seen how unashamedly BTU ratings - whixch should be in watt or kilowatt only - were given in Dutch language information and specifications on air conditioners! Han