![]() In 1988 Research Project 472 worked to correct these oversights with the introduction of a classification system for walls, roofs, and zones. Research completed in 1984 revealed some factors which were not accounted for in the original publication of the method these findings were a result of the research project 359. History After its introduction in the 1979 handbook, research continued on increasing the accuracy of the CLTD/CLF method. ![]() ![]() ![]() Ashrae Cooling And Heating Load Calculation ManualĪshrae Cooling And Heating Load Calculation Manual.Error when using the CLTD/CLF/SCL method tends to be less than twenty percent over and less than ten percent under. This method was developed as a simpler calculation alternative to difficult and unwieldy calculation methods such as the transfer function method and the method. CLTD/CLF/SCL cooling load calculation method The CLTD/CLF/SCL (cooling load temperature difference/cooling load factor/solar cooling load factor) calculation method was first introduced in the 1979 Cooling and Heating Load Manual (GRP-158) The CLTD/CLF/SCL Method is regarded as a reasonably accurate approximation of the total heat gains through a building envelope for the purposes of sizing equipment.
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