@misc{1181811,
  author = {George E Kelly and Mark E Kuklewicz},
  title = {Recommended testing and calculation procedures for estimating the seasonal performance of residential condensing furnaces and boilers:},
  year = {1981},
  month = {1981-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.80-2110},
  language = {en},
}