Excerpts
2.10.1 of ANSI Z21.56â2006, the industry test standard that is incorporated by reference into appendix P for gas-fired pool heaters, includes the use of ⦠section 6 of AHRI 1160â2009, the industry test standard that is incorporated by reference into appendix P for heat pump pool heaters. EPCA mandates that ⦠equation for thermal efficiency in section 2.10.1 of ANSI Z21.56 (incorporated by reference; see §â430.3) and divided by 0.5 h (For electric resistance and