TY  - RPRT
TI  - Performance of add-on type heat pump water heaters using two different test methods 
AU  - Harris, James E
PY  - 1983
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 83-2723
DO  - 10.6028/NBS.IR.83-2723
ER  -