TY  - RPRT
TI  - Recommended testing and calculation procedures for estimating the seasonal performance of residential condensing furnaces and boilers 
AU  - Kelly, George E
AU  - Kuklewicz, Mark E
PY  - 1981
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 80-2110
DO  - 10.6028/NBS.IR.80-2110
ER  -