TY - GEN AU - Stephen R Petersen AU - George E Kelly C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1980-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.80-2079 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1980 TI - an economic analysis of efficiency improvements to residential gas- and oil-fired central heating equipment: ER -