Standard 41.9 prescribes methods for measuring mass flow rates for refrigerants and refrigerant/lubricant mixtures using calorimeters. The 2021 edition is a comprehensive update that includes changes to steady-state criteria and the lubricant circulation rate measurement methods.
ASHRAE 41.9-2021 History
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$37.00 $75.00
ASHRAE 41.9-2018
$37.00 $75.00
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