For a project overseas utilizing split systems with heat recovery, confirm that it is acceptable to use a conversion ratio of 0.875 for EER to SEER (equipment outside of North America is only specified in EER), and that JIS, rather than ARI is an approved testing procedure.
The conversion ratio presented (0.875) seems appropriate based on the US EPA conversion. Secondly, the project is requesting confirmation of non standard (ARI) testing methods for the proposed equipment efficiencies. In regard to the non-standard testing methods, assuming the project is using a performance based approach, the proposed equipment is not required to meet any particular efficiency limits; however, the proposed equipment must be modeled appropriately and accurately. Meaning that whatever efficiency and standard is used, the equivalent efficiency and operating conditions must be modeled in the energy simulation software. Applicable internationally.