TY - GEN AU - James E Harris C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1983-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.83-2723 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1983 TI - Performance of add-on type heat pump water heaters using two different test methods: ER -