Update Rule_11-7.md

docs/section11/Rule_11-7.md

@@ -1,47 +1,50 @@
 # Service_Water_Heating - Rule 11-7  
-**Schema Version:** 0.0.36  
+**Schema Version:** 0.0.37  
 
 **Mandatory Rule:** TRUE
 
 **Rule ID:** 11-7  
 
-**Rule Description:** Except in buildings that will have no service water heating loads,  the service water heating systems type in the baseline building design shall be as specified in Table G3.1.1-2 for each building area type in the proposed design. 
+**Rule Description:** Except in buildings that will have no service water heating loads, the service water heating system type in the baseline building design shall be as specified in Table G3.1.1-2 for each building area type in the proposed design. 
 
 **Rule Assertion:** Options are PASS/FAIL
 
 **Appendix G Section Reference:** Table G3.1 #11, baseline column, a & b
 
-**Evaluation Context:** B-RMD each SWH Equipment
+**Evaluation Context:** B-RMD each SWH Equipment  
 **Data Lookup:**   
-- **Table G3.1.1-2(shw_bat)**
-**Function Call:** 
-- **get_component_by_id**
-- **get_SHW_equipment_associated_with_each_SWH_bat**  
-- **get_SHW_types_and_SHW_use**
-- **get_SHW_equipment_type**  
+- **Table G3.1.1-2(swh_bat)**  
+**Function Call:**  
+- **get_component_by_id**  
+- **get_SWH_equipment_associated_with_each_SWH_bat**  
+- **get_SWH_bats_and_SWH_use**  
+- **get_SWH_equipment_type**  
 
 **Applicability Checks:**
-- Each SHW use type is applicable if there are SHW loads
-- use get_SHW_equipment_associated_with_each_SWH_bat to get the SHW use types and SHW use in the building: `shw_bats_and_equip_dict = get_SHW_equipment_associated_with_each_SWH_bat(B_RMD)`
+- Note: Applicability is determined at the building segment level, but the rule is evaluated for all SWH equipment serving the building segment.
+- Each SWH bat is applicable if there are SWH loads in the BAT in the proposed model
 
-- call the function get_SHW_types_and_SHW_use for the proposed: `shw_bat_and_use_dict_p = get_SHW_types_and_SHW_use(P_RMD)`
-- look through each of the SHW bats in the building: `for shw_bat in shw_bat_and_use_dict_p:`
-  - check if there are SHW loads in this use type, continue to rule logic: `if len(shw_bat_and_use_dict_p[shw_bat]) > 0: CONTINUE TO RULE LOGIC`
-  - otherwise, rule is not applicable for this shw_bat: `else: NOT_APPLICABLE`
+- call the function get_SWH_bats_and_SWH_use for the proposed: `swh_bats_and_uses_p = get_SWH_bats_and_SWH_use(P_RMD)`
+- look through each of the SWH bats in the building: `for swh_bat in swh_bats_and_uses_p:`
+    - look at each service water heating use in the BAT: `for swh_use_id in swh_bats_and_uses_p[swh_bat]:`
+      - get the swh use from the swh_use_id: `swh_use = get_component_by_id(P_RMD, swh_use_id)`
+      - check if there are SWH loads in this use, continue to rule logic.  In this case, we are not worried about the use_units, we just want to know that there is a use that is greater than 0: `if swh_use.use > 0: CONTINUE TO RULE LOGIC`
+    - otherwise, rule is not applicable for this swh_bat: `else: NOT_APPLICABLE`
 
   ## Rule Logic: 
-  - look at each SWH Equipment in the shw_bat - there should only be one, but this is checked in rule 11-8: `for swh_equip_id in shw_bats_and_equip_dict[shw_bat]["SHWHeatingEq"]:`
-    - get the SHW equipment type using the function get_SHW_equipment_type: `shw_equip_type = get_SHW_equipment_type(B_RMD, swh_equip_id)`
-    - get the expected SHW equipment type by looking it up in the table G3.1.1-2: `expected_shw_equip_type = data_lookup(Table G3.1.1-2, shw_bat)`
+  - use get_SWH_equipment_associated_with_each_SWH_bat to get the SWH use types and SWH use in the building: `swh_bats_and_uses_b = get_SWH_equipment_associated_with_each_SWH_bat(B_RMD)`
+  - look at each SWH Equipment in the swh_bat.  Appendix G requires only one system per bat, but this is covered in rule 11-8, so here we will allow multiple SWH equipment: `for swh_equip_id in swh_bats_and_uses_b[swh_bat]["SWHHeatingEq"]:`
+    - get the SWH equipment type using the function get_SWH_equipment_type: `swh_equip_type = get_SWH_equipment_type(B_RMD, swh_equip_id)`
+    - get the expected SWH equipment type by looking it up in the table G3.1.1-2: `expected_swh_equip_type = data_lookup(Table G3.1.1-2, swh_bat)`
 
 
 
 ## Rule Assertion: 
-- Case1: the expected_shw_equip_type matches shw_equip_type: PASS: `if expected_shw_equip_type == shw_equip_type: PASS`
-- Case2: the expected_shw_equip_type doesn't match shw_equip_type, `FAIL: else: FAIL`
+- Case1: the expected_swh_equip_type matches swh_equip_type: PASS: `if expected_swh_equip_type == swh_equip_type: PASS`
+- Case2: the expected_swh_equip_type doesn't match swh_equip_type, `FAIL: else: FAIL`
 
 
   **Notes:**
-  1.  The rule states bats for the proposed, but this is complex to check - can we add that SHW uses need to have the same use type to the section 1 general checks?
+  1.  The rule states bats for the proposed, but this is complex to check - can we add that SWH uses need to have the same use type to the section 1 general checks?
 
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