removed electric boiler rec

recommendations/Costs.py

@@ -92,6 +92,12 @@ CONDENSING_BOILER_COSTS = {
     "40kw": 1625
 }
 
+# Electric boiler prices base on
+# https://www.greenmatch.co.uk/boilers/combi-boilers/electric-combi-boilers
+# https://www.tlc-direct.co.uk/Products/ERMAC15.html
+# The unit is a 15kw boiler, capable of outputting between 3kw and 15kw. Costs seem to be around £1800
+ELECTRIC_BOILER_COSTS = 1800
+
 # Assumes 3 hours to remove each heater (including re-decorating)
 ROOM_HEATER_REMOVAL_COST = 120
 ROOM_HEATER_REMOVAL_LABOUR_HOURS = 3
@@ -1285,7 +1291,7 @@ class Costs:
         estimated_radiators = max(total_radiators_based_on_power, base_radiators + additional_radiators)
         return round(estimated_radiators)
 
-    def boiler(self, 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, is_electric=False):
         """
         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:
@@ -1293,7 +1299,10 @@ class Costs:
         :return:
         """
 
-        unit_cost = CONDENSING_BOILER_COSTS[size]
+        if not is_electric:
+            unit_cost = CONDENSING_BOILER_COSTS[size]
+        else:
+            unit_cost = ELECTRIC_BOILER_COSTS
         # The unit cost is the cost without VAT
         # We now need to estimate the cost of the works
         labour_days = 2
@@ -1307,8 +1316,6 @@ class Costs:
         # Add contingency and preliminaries
         labour_cost = labour_cost * (1 + self.CONTINGENCY + self.PRELIMINARIES)
 
-        # labour_days = labour_days + (removal_labour_hours / 8)
-
         vat = labour_cost * self.VAT_RATE
 
         subtotal_before_vat = unit_cost + labour_cost

recommendations/HeatingControlRecommender.py

@@ -35,6 +35,10 @@ class HeatingControlRecommender:
 
             return
 
+        if heating_description in ["Boiler and radiators, electric"]:
+            self.recommend_roomstat_programmer_trvs()
+            return
+
         if heating_description in ["Air source heat pump, radiators, electric"]:
             self.recommend_time_temperature_zone_controls()
 

recommendations/HeatingRecommender.py

@@ -119,6 +119,69 @@ class HeatingRecommender:
 
         return
 
+    def recommend_electric_boiler_upgrade(self, phase):
+
+        # Small initial scope, just handles the case of properties that have electric boilers where the efficiency
+        # is poor or very poor
+        # We recommend upgrading to a new electric boiler
+
+        recommendation_phase = phase
+
+        if self.property.data["mainheat-energy-eff"] not in ["Poor", "Very Poor"]:
+            return
+
+        hotwater_from_mains = self.property.hotwater["clean_description"] in ["From main system"]
+        hotwater_from_cylinder = self.property.hotwater["clean_description"] in [
+            "From main system, no cylinder thermostat"
+        ]
+        # if the hotwater is from the mains, we probably have a combi boiler so we recommend a new electric boiler
+
+        if hotwater_from_mains:
+            description = f"Upgrade to a higher efficiency electric boiler"
+
+            simulation_config = {
+                "mainheat_energy_eff_ending": "Average",
+                "hot_water_energy_eff_ending": "Average"
+            }
+
+            boiler_costs = self.costs.boiler(
+                size=None,
+                exising_room_heaters=False,
+                system_change=False,
+                n_heated_rooms=self.property.data["number-heated-rooms"],
+                n_rooms=self.property.number_of_rooms,
+                is_electric=True
+            )
+
+            already_installed = "heating" in self.property.already_installed
+            if already_installed:
+                boiler_costs = override_costs(boiler_costs)
+                description = "Heating system has already been upgraded, no further action needed."
+
+            boiler_recommendation = {
+                "phase": recommendation_phase,
+                "parts": [],
+                "type": "heating",
+                "description": description,
+                "starting_u_value": None,
+                "new_u_value": None,
+                "sap_points": None,
+                "already_installed": already_installed,
+                "simulation_config": simulation_config,
+                **boiler_costs
+            }
+
+            controls_recommender = HeatingControlRecommender(self.property)
+            controls_recommender.recommend(heating_description="Boiler and radiators, electric")
+
+            self.heating_recommendations.extend([boiler_recommendation] + controls_recommender.recommendation)
+            return
+
+        if hotwater_from_cylinder:
+            # We recommend a change from a system boiler, with a cylinder to a combi boiler
+            description = ("Replace the existing boiler and cylinder without a thermostat with a new electric combi "
+                           "boiler")
+
     def is_ashp_valid(self):
         suitable_property_type = self.property.data["property-type"] in ["House", "Bungalow"]
         has_air_source_heat_pump = self.property.main_heating["has_air_source_heat_pump"]
@@ -458,6 +521,19 @@ class HeatingRecommender:
 
         return closest_size
 
+    @staticmethod
+    def estimate_electric_boiler_size(num_heated_rooms):
+        """
+        We use the approach similar to as defined in
+        https://www.greenmatch.co.uk/boilers/combi-boilers/electric-combi-boilers
+        Instead of radiators as a proxy, we do the number of heated rooms
+
+        :param num_heated_rooms: The number of heated rooms in the property
+        :return:
+        """
+
+        return max(num_heated_rooms * 1.5, 6)
+
     def recommend_boiler_upgrades(self, phase, system_change, exising_room_heaters):
         """
         This boiler recommendation will only recommend a like-for-like upgrade, since changing the system