diff --git a/rct229/rulesets/ashrae9012022/__init__.py b/rct229/rulesets/ashrae9012022/__init__.py
index befd2e8036..53ae9e99bf 100644
--- a/rct229/rulesets/ashrae9012022/__init__.py
+++ b/rct229/rulesets/ashrae9012022/__init__.py
@@ -69,6 +69,7 @@
     "prm9012022rule23o29": "section6rule11",
     "prm9012022rule12d80": "section6rule12",
     "prm9012022rule86d29": "section6rule13",
+    "prm9012022rule23z21": "section12rule5",
     "prm9012022rule93e12": "section21rule19",
 }
 
diff --git a/rct229/rulesets/ashrae9012022/section12/__init__.py b/rct229/rulesets/ashrae9012022/section12/__init__.py
new file mode 100644
index 0000000000..df71929c80
--- /dev/null
+++ b/rct229/rulesets/ashrae9012022/section12/__init__.py
@@ -0,0 +1,16 @@
+# Add all available rule modules in __all__
+import importlib
+
+__all__ = [
+    "section12rule5",
+]
+
+
+def __getattr__(name):
+    if name in __all__:
+        return importlib.import_module("." + name, __name__)
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+
+
+def __dir__():
+    return sorted(__all__)
diff --git a/rct229/rulesets/ashrae9012022/section12/section12rule5.py b/rct229/rulesets/ashrae9012022/section12/section12rule5.py
new file mode 100644
index 0000000000..f4e5987ca2
--- /dev/null
+++ b/rct229/rulesets/ashrae9012022/section12/section12rule5.py
@@ -0,0 +1,150 @@
+from pydash import flatten
+from rct229.rule_engine.rule_base import RuleDefinitionBase
+from rct229.rule_engine.rule_list_indexed_base import RuleDefinitionListIndexedBase
+from rct229.rule_engine.ruleset_model_factory import produce_ruleset_model_description
+from rct229.rulesets.ashrae9012019 import PROPOSED
+from rct229.schema.config import ureg
+from rct229.schema.schema_enums import SchemaEnums
+from rct229.utils.assertions import getattr_
+from rct229.utils.jsonpath_utils import find_all
+from rct229.utils.schedule_utils import get_schedule_multiplier_hourly_value_or_default
+
+END_USE = SchemaEnums.schema_enums["EndUseOptions"]
+
+ACCEPTABLE_RESULT_TYPE = [
+    END_USE.MISC_EQUIPMENT,
+    END_USE.INDUSTRIAL_PROCESS,
+    END_USE.OFFICE_EQUIPMENT,
+    END_USE.COMPUTERS_SERVERS,
+    END_USE.COMMERCIAL_COOKING,
+]
+
+
+class PRM9012022Rule23z21(RuleDefinitionListIndexedBase):
+    """Rule 5 of ASHRAE 90.1-2022 Appendix G Section 12 (Receptacle)"""
+
+    def __init__(self):
+        super(PRM9012022Rule23z21, self).__init__(
+            rmds_used=produce_ruleset_model_description(
+                USER=False, BASELINE_0=False, PROPOSED=True
+            ),
+            each_rule=PRM9012022Rule23z21.RMDRule(),
+            index_rmd=PROPOSED,
+            id="12-5",
+            description="hese loads shall always be included in simulations of the building. These loads shall be included when calculating the proposed building performance "
+            "and the baseline building performance as required by Section G1.2.1.",
+            ruleset_section_title="Receptacle",
+            standard_section="Table G3.1-12 Proposed Building Performance column",
+            is_primary_rule=True,
+            list_path="ruleset_model_descriptions[0]",
+        )
+
+    class RMDRule(RuleDefinitionListIndexedBase):
+        def __init__(self):
+            super(PRM9012022Rule23z21.RMDRule, self).__init__(
+                rmds_used=produce_ruleset_model_description(
+                    USER=False, BASELINE_0=False, PROPOSED=True
+                ),
+                each_rule=PRM9012022Rule23z21.RMDRule.MiscellaneousEquipmentRule(),
+                index_rmd=PROPOSED,
+                list_path="buildings[*].building_segments[*].zones[*].spaces[*]",
+            )
+
+        def create_data(self, context, data):
+            rmd_p = context.PROPOSED
+
+            schedule_eflh_p = sum(
+                flatten(
+                    [
+                        get_schedule_multiplier_hourly_value_or_default(
+                            rmd_p,
+                            getattr_(
+                                misc_equip_p,
+                                "miscellaneous_equipment",
+                                "multiplier_schedule",
+                            ),
+                        )
+                        for misc_equip_p in find_all(
+                            "$.buildings[*].building_segments[*].zones[*].spaces[*].miscellaneous_equipment[*]",
+                            rmd_p,
+                        )
+                    ]
+                ),
+                0,
+            )
+
+            has_annual_energy_use_p = any(
+                getattr_(annual_end_use_result, "annual_end_use_results", "type")
+                in ACCEPTABLE_RESULT_TYPE
+                and getattr_(
+                    annual_end_use_result,
+                    "annual_end_use_results",
+                    "annual_site_energy_use",
+                )
+                > 0 * ureg("J")
+                for annual_end_use_result in find_all(
+                    "$.model_output.annual_end_use_results[*]",
+                    rmd_p,
+                )
+            )
+
+            return {
+                "schedule_eflh_p": schedule_eflh_p,
+                "has_annual_energy_use_p": has_annual_energy_use_p,
+            }
+
+        class MiscellaneousEquipmentRule(RuleDefinitionBase):
+            def __init__(self):
+                super(
+                    PRM9012022Rule23z21.RMDRule.MiscellaneousEquipmentRule,
+                    self,
+                ).__init__(
+                    rmds_used=produce_ruleset_model_description(
+                        USER=False, BASELINE_0=False, PROPOSED=True
+                    ),
+                    required_fields={
+                        "$": ["power", "sensible_fraction", "latent_fraction"]
+                    },
+                )
+
+            def get_calc_vals(self, context, data=None):
+                misc_equip_p = context.PROPOSED
+                has_annual_energy_use_p = data["has_annual_energy_use_p"]
+                schedule_eflh_p = data["schedule_eflh_p"]
+
+                loads_included_p = (
+                    misc_equip_p["power"] > 0 * ureg("W")
+                    and (
+                        misc_equip_p["sensible_fraction"] > 0
+                        or misc_equip_p["latent_fraction"] > 0
+                    )
+                    and schedule_eflh_p > 0
+                )
+
+                return {
+                    "loads_included_p": loads_included_p,
+                    "has_annual_energy_use_p": has_annual_energy_use_p,
+                }
+
+            def rule_check(self, context, calc_vals=None, data=None):
+                loads_included_p = calc_vals["loads_included_p"]
+                has_annual_energy_use_p = calc_vals["has_annual_energy_use_p"]
+
+                return loads_included_p and has_annual_energy_use_p
+
+            def get_fail_msg(self, context, calc_vals=None, data=None):
+                misc_equip_p = context.PROPOSED
+                loads_included_p = calc_vals["loads_included_p"]
+                has_annual_energy_use_p = calc_vals["has_annual_energy_use_p"]
+                schedule_eflh_p = data["schedule_eflh_p"]
+
+                FAIL_MSG = ""
+                if not loads_included_p:
+                    FAIL_MSG = (
+                        f"No miscellaneous equipment loads are included. [power: {misc_equip_p['power']}, sensible_fraction: {misc_equip_p['sensible_fraction']}, "
+                        f"latent_fraction: {misc_equip_p['latent_fraction']}, schedule_eflh: {schedule_eflh_p}] {'No annual end use energy is reported for the relevant equipment types. {has_annual_energy_use_p_msg}'}"
+                    )
+                if not has_annual_energy_use_p:
+                    FAIL_MSG += " No annual end use energy is reported for the relevant equipment types."
+
+                return FAIL_MSG