Full Description

ASHRAE Standard 118.1 provides test procedures for rating directly heated commercial service water heating equipment.

The revised 2022 edition of the standard:

Updated the scope to be consistent with the Department of Energy's July 11, 2015, final rule that establishes new definitions for "commercial" and "residential duty commercial" water heaters. Revised the definition of "heat-pump water heater." Updated the classification for Type III water heaters. Section 7.2, "Water Piping," was updated and defined visually in Figures 1 through 14. Updated venting requirements. Reviewed and revised all equations as appropriate for I-P and SI units. Revised apparatus for testing AS-HPWH with ducted discharge air. Revised test tolerances (Table 1). Updated supply water temperatures for testing heat pumps (Table 3). Revised test methods and calculations for all heat-pump water heaters (including air source) to be steady state, consistent with Types I, II, and III water heaters. Updated setting outlet water temperature for heating capacity for Types 1 through V water heaters. Added water heaters with multiple outlet water connections. Added new standby loss test method and calculations for Types II and III water heaters. Updated references and appendices.

Product Details

Published: 2021 ANSI: ANSI Approved Number of Pages: 40 Units of Measure: Dual File Size: 1 file , 9.8 MB Product Code(s): D-86376, 86376 Note: This product is unavailable in Russia, Belarus, Ukraine