A test method and calculation procedure for determining annual efficiency for vented household heaters and furnaces equipped with modulating-type controls
By: Esher Kweller, Robert L. Palla, Jr. ; prepared for United States Department of Energy.
Contributors: Palla, Robert L.; United States. Dept. of Energy.; United States. National Bureau of Standards.
Series: NBSIR -- 82-2497.; NBSIR -- 2497.
Publisher: U.S. Dept. of Commerce, National Bureau of Standards
Published: 1982
Place of publication: Washington, DC
Language: eng
Number of pages: 56
Subjects: Ventilation.; Furnaces.
Notes: "May 1982."

Includes bibliographical references.