diff --git a/src/oge/helpers.py b/src/oge/helpers.py
index 392a988..1bd2840 100644
--- a/src/oge/helpers.py
+++ b/src/oge/helpers.py
@@ -305,25 +305,39 @@ def assign_fleet_to_subplant_data(
         validate="m:1",
     )
 
-    # check that there is no missing ba or fuel codes for subplants with nonzero gen
-    # for CEMS data, check only units that report positive gross generaiton
+    # check that there is no missing ba or fuel codes for subplants with nonzero
+    # generation and fuel consumption
+
+    # for CEMS data, check only units that report positive gross generaiton and fuel
+    # consumption
     if "gross_generation_mwh" in subplant_data.columns:
         missing_fleet_keys = subplant_data[
+            (
+                (subplant_data["gross_generation_mwh"] > 0)
+                | (subplant_data["fuel_consumed_mmbtu"] > 0)
+            )
+        ]
+        missing_fleet_keys = missing_fleet_keys[
             (
                 (subplant_data["ba_code"].isna())
                 | (subplant_data[fuel_category_col].isna())
-                & (subplant_data["gross_generation_mwh"] > 0)
             )
         ]
-    # otherwise, check units that report non-zero net generation
+    # otherwise, check units that report non-zero net generation and fuel consumption
     else:
         missing_fleet_keys = subplant_data[
+            (
+                (subplant_data["net_generation_mwh"] != 0)
+                | (subplant_data["fuel_consumed_mmbtu"] != 0)
+            )
+        ]
+        missing_fleet_keys = missing_fleet_keys[
             (
                 (subplant_data["ba_code"].isna())
                 | (subplant_data[fuel_category_col].isna())
-                & (subplant_data["net_generation_mwh"] != 0)
             )
         ]
+
     if len(missing_fleet_keys) > 0:
         logger.warning(
             missing_fleet_keys.groupby(
@@ -334,16 +348,13 @@ def assign_fleet_to_subplant_data(
                     fuel_category_col,
                 ],
                 dropna=False,
-            )[
-                [
-                    "net_generation_mwh",
-                ]
-            ]
+            )[["net_generation_mwh", "fuel_consumed_mmbtu"]]
             .sum()
             .to_string()
         )
         raise UserWarning(
-            "The plant attributes table is missing ba_code or fuel_category data for some plants. This will result in incomplete power sector results."
+            "The plant attributes table is missing ba_code or fuel_category data for "
+            "some plants. This will result in incomplete power sector results."
         )
 
     return subplant_data