TY  - RPRT
TI  - Field performance of three residential heat pumps in the heating mode 
AU  - Kao, James Y
AU  - Mulroy, William J
AU  - Didion, David A
PY  - 1987
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 87-3528
DO  - 10.6028/NBS.IR.87-3528
ER  -