diff --git a/recommendations/FireplaceRecommendations.py b/recommendations/FireplaceRecommendations.py
index 60802bb6..60e54073 100644
--- a/recommendations/FireplaceRecommendations.py
+++ b/recommendations/FireplaceRecommendations.py
@@ -8,17 +8,18 @@ class FireplaceRecommendations(Definitions):
     For properties that have open fireplaces, we recommend sealing the fireplaces
     """
 
-    # This is our base assumption for the cost of the work
-    COST_OF_WORK = 235
-
     def __init__(
         self,
         property_instance: Property,
+        materials: list = None,
     ):
         self.property = property_instance
 
         self.has_ventilaion = None
         self.recommendation = None
+        self.materials = [m for m in materials if m["type"] == "sealing_fireplace"]
+        if len(self.materials) != 1:
+            raise ValueError("Incorrect number of sealing fireplace materials specified")
 
     def recommend(self, phase=0):
         """
@@ -32,14 +33,16 @@ class FireplaceRecommendations(Definitions):
         if number_open_fireplaces == 0:
             return
 
+        material = self.materials[0]
+
         already_installed = "sealing_open_fireplace" in self.property.already_installed
-        estimated_cost = number_open_fireplaces * self.COST_OF_WORK if not already_installed else 0
+        estimated_cost = number_open_fireplaces * material["total_cost"] if not already_installed else 0
 
         # We recommend installing two mechanical ventilation systems
         self.recommendation = [
             {
                 "phase": phase,
-                "parts": [],
+                "parts": [material],
                 "type": "sealing_open_fireplace",
                 "measure_type": "sealing_open_fireplace",
                 "description": "Seal %s open fireplaces" % str(number_open_fireplaces),
@@ -53,6 +56,7 @@ class FireplaceRecommendations(Definitions):
                 "labour_days": 6 * number_open_fireplaces / 8,  # Assume 8 hour day
                 "description_simulation": {
                     "number-open-fireplaces": 0
-                }
+                },
+                "innovation_rate": material["innovation_rate"],
             }
         ]