Added boiler upgrade recommendation

etl/customers/gla_croydon_demo/asset_list.py

@@ -34,8 +34,9 @@ def app():
         low_memory=False
     )
 
-    z = epc_data.groupby(["WALLS_DESCRIPTION", "WALLS_ENERGY_EFF"]).size().reset_index(name="count")
-    z = z[z["MAINHEAT_DESCRIPTION"] == "Boiler and radiators, mains gas"]
+    z = epc_data[epc_data["MAINHEAT_DESCRIPTION"] == "Boiler and radiators, mains gas"]
+    z["HOTWATER_DESCRIPTION"].value_counts()
+    z["MAIN_FUEL"].value_counts()
 
     # Filter on entries where we have a UPRN
     epc_data = epc_data[~pd.isnull(epc_data["UPRN"])]

recommendations/Costs.py

@@ -67,18 +67,12 @@ LOW_CARBON_COMBI_BOILER = 2200
 # https://www.greenmatch.co.uk/boilers/35kw-boiler
 # https://www.greenmatch.co.uk/boilers/40kw-boiler
 # These are exclusive of installation costs
-COMBI_BOILER_COSTS = {
+CONDENSING_BOILER_COSTS = {
     "30kw": 1550,
     "35kw": 1610,
     "40kw": 1625
 }
 
-CONVENTIONAL_BOILER_COSTS = {
-    "30kw": 1117,
-    "35kw": 1546,
-    "40kw": 1776
-}
-
 # Assumes 3 hours to remove each heater (including re-decorating)
 ROOM_HEATER_REMOVAL_COST = 120
 ROOM_HEATER_REMOVAL_LABOUR_HOURS = 3
@@ -1179,7 +1173,7 @@ class Costs:
         estimated_radiators = max(total_radiators_based_on_power, base_radiators + additional_radiators)
         return round(estimated_radiators)
 
-    def boiler(self, is_combi, size, exising_room_heaters, system_change, n_heated_rooms, n_rooms):
+    def boiler(self, size, exising_room_heaters, system_change, n_heated_rooms, n_rooms):
         """
         Based on a basic estimate of median value £2600 to install a low carbon combi boiler
         First time central heating vosts can als be found here:
@@ -1187,7 +1181,7 @@ class Costs:
         :return:
         """
 
-        unit_cost = COMBI_BOILER_COSTS[size] if is_combi else CONVENTIONAL_BOILER_COSTS[size]
+        unit_cost = CONDENSING_BOILER_COSTS[size]
         # The unit cost is the cost without VAT
         # We now need to estimate the cost of the works
         labour_days = 2

recommendations/HeatingRecommender.py

@@ -312,7 +312,15 @@ class HeatingRecommender:
         simulation_config = {}
         boiler_costs = {}
         boiler_recommendation = {}
-        if self.property.data["mainheat-energy-eff"] in ["Very Poor", "Poor", "Average"]:
+
+        has_inefficient_space_heating = self.property.data["mainheat-energy-eff"] in ["Very Poor", "Poor", "Average"]
+
+        has_inefficient_mains_water = (
+            self.property.hotwater["clean_description"] in ["From main system"] and
+            self.property.data["hot-water-energy-eff"] in ["Very Poor", "Poor", "Average"]
+        )
+
+        if has_inefficient_space_heating or has_inefficient_mains_water:
             boiler_size = self.estimate_boiler_size(
                 property_type=self.property.data["property-type"],
                 built_form=self.property.data["built-form"],
@@ -321,22 +329,12 @@ class HeatingRecommender:
                 num_heated_rooms=self.property.data["number-heated-rooms"],
             )
 
-            # We recommend a combi boiler under the following conditions
-            # 1) If there are 4 or fewer rooms (we don't use heqted rooms because none of the rooms could be
-            #    heated if there is no existing heating system).
-            # 2) There 1 or fewer bathrooms
-            # Otherwise, we recommend a gas condensing boiler, which will server a larger property, that has multiple
-            # bathrooms
-            is_combi = (
-                (self.property.number_of_rooms <= 4) and
-                (self.property.n_bathrooms in [None, 0, 1])
-            )
-            if is_combi:
-                description = "Upgrade to a new combi boiler"
-            else:
-                description = "Upgrade to a new gas condensing boiler"
+            description = "Upgrade to a new condensing boiler"
 
-            simulation_config = {"mainheat_energy_eff_ending": "Good"}
+            simulation_config = {
+                "mainheat_energy_eff_ending": "Good",
+                "hot_water_energy_eff_ending": "Good"
+            }
             if system_change:
                 # Installation of a boiler improves the hot water system so we need to reflect this in
                 # the outcome of the recommendation
@@ -363,7 +361,6 @@ class HeatingRecommender:
                 }
 
             boiler_costs = self.costs.boiler(
-                is_combi=is_combi,
                 size=f"{boiler_size}kw",
                 exising_room_heaters=exising_room_heaters,
                 system_change=system_change,