The 2001 ASHRAE Handbook will have a load calculation chapter that’s “radically different,” according to forum speakers at the recent American Society of Heating, Refrigerating, and Air-Conditioning Engin-eers (ASHRAE) Summer Meeting, held here. These “new” load calculation methods also will be incorporated into Manual J and N updates by the Air Conditioning Contractors of America (ACCA), according to president Roger Jask.
Last year, an ASHRAE technical committee ran a comparison of two new load calculation procedures, heat balance (HB) and radiant time series (RTS), with old methods, CLTD/CLF, TFM, and TETD/TA. While HB and RTS are being referred to as new, they are, in fact, older and relatively simpler than those they will replace.