TY - RPRT TI - Method for estimating the energy efficiency ratio of mixed system air conditioners and heat pumps AU - Domanski, Piotr A AU - Kim, Byoung Soon PY - 1997 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 6045 DO - 10.6028/NIST.IR.6045 ER -