diff --git a/hub/imports/construction/nrcan_physics_parameters.py b/hub/imports/construction/nrcan_physics_parameters.py
index ba5b15f8..404f27e9 100644
--- a/hub/imports/construction/nrcan_physics_parameters.py
+++ b/hub/imports/construction/nrcan_physics_parameters.py
@@ -77,7 +77,7 @@ class NrcanPhysicsParameters:
     nrcan_archetypes = nrcan_catalog.entries('archetypes')
     for building_archetype in nrcan_archetypes:
       construction_period_limits = building_archetype.construction_period.split('_')
-      if int(construction_period_limits[0]) <= year_of_construction <= int(construction_period_limits[1]):
+      if int(construction_period_limits[0]) <= int(year_of_construction) <= int(construction_period_limits[1]):
         if (str(function) == str(building_archetype.function)) and \
            (climate_zone == str(building_archetype.climate_zone)):
           return building_archetype
diff --git a/hub/imports/construction/nrel_physics_parameters.py b/hub/imports/construction/nrel_physics_parameters.py
index a7f11cdf..80836a4d 100644
--- a/hub/imports/construction/nrel_physics_parameters.py
+++ b/hub/imports/construction/nrel_physics_parameters.py
@@ -78,7 +78,7 @@ class NrelPhysicsParameters:
       construction_period_limits = building_archetype.construction_period.split(' - ')
       if construction_period_limits[1] == 'PRESENT':
         construction_period_limits[1] = 3000
-      if int(construction_period_limits[0]) <= year_of_construction < int(construction_period_limits[1]):
+      if int(construction_period_limits[0]) <= int(year_of_construction) < int(construction_period_limits[1]):
         if (str(function) == str(building_archetype.function)) and \
            (climate_zone == str(building_archetype.climate_zone)):
           return building_archetype