ZERH MF Ver2 Implementation

[bpark1327]

Pull Request Description

ZERH MF Ver2 Implementation (https://www.energy.gov/sites/default/files/2023-03/DOE%20ZERH%20Multifamily%20V2%20-%20ERI%20Target%20Procedure%20DRAFT%20March%202023.pdf)

Checklist

PR Author: Check these when they're done. Not all may apply. strikethrough and check any that do not apply.

PR Reviewer: Verify each has been completed.

• OS-HPXML git subtree has been pulled
• 301/ES rulesets and unit tests have been updated
• 301validator.xml has been updated (reference EPvalidator.xml)
• Workflow tests have been updated
• Documentation has been updated
• Changelog has been updated
• openstudio tasks.rb update_measures has been run
• No unexpected regression test changes on CI

[bpark1327]

@shorowit ZERH MF Ver 2 has the specification for a unit served by a commercial water heating system:

"System Type (when Rated Unit is served by a commercial system): Same as system serving the Rated
Unit. For fossil-fuel boilers or water heaters, use 90% Et . For electric boilers or water heaters, use 2.2
COP."

Currently, we assume all water heaters are residential because we require EF/UEF. We may need to accommodate commercial water heaters and allow for thermal efficiency (Et) input.

[bpark1327]

Need to update mech vent SRE -> ASRE

Addressed in commit 6a1110d

[bpark1327]

Updated to ZERH MF Ver2 released on 11/27/2023

[shorowit]

Nice work, @bpark1327. Looks good to me.