ASHRAE has a metric policy, but it is a rather weak one (at least compared to SAE). I found it on the web: http://www.ashrae.org/doclib/20060824_thesiguide.pdf
Their policy seems to be mostly "dual" either side by side in a single document, or in standards and handbooks, to have an inch-pound edition and an SI edition. Their metric practice is in the same document. I only glanced at it, but their practice, when they actually practice metric, seems ok. Calculations can be done in either system (horrors!!!) but it should be defined, and generally supplemental data in the other system should be converted to appropriate accuracy. It looks like you could be either SI or inch-pound and be accepted by doing enough conversion. I don't know how they REALLY practice. I don't see this "side by side" thing as a pathway to metrication, I see it being a pathway to not knowing what they want to be when they grow up. ________________________________ From: Robert H. Bushnell <roberthb...@comcast.net> To: U.S. Metric Association <usma@colostate.edu> Sent: Mon, January 10, 2011 4:30:42 PM Subject: [USMA:49460] Btu 2011 Jan 10 Some time ago somebody asked "who needs Btu?" One answer is ASHRAE for it's publication High Performance Buildings. I asked them to use SI. They said no. Their readers are builders and maintenance people who want to see inch-pound units. The units used are: ft in square footage R value kBtu kBtu/ft^2 heating degree days degree F therm gallon kWh gallon W/ft^2 MMBtu cfm cfm/ft^2 acre lb kcf lb mile mpg ton (cooling) In the winter 2011 issue for the two plants in Ohio Honda lists GJ first with kBtu in paren as 5.13 GJ (4.872 kBtu). ASHRAE Journal allows some SI. Robert Bushnell
