diff --git a/HPXMLtoOpenStudio/measure.xml b/HPXMLtoOpenStudio/measure.xml
index d71fb4420d..a41cf7e08a 100644
--- a/HPXMLtoOpenStudio/measure.xml
+++ b/HPXMLtoOpenStudio/measure.xml
@@ -3,8 +3,8 @@
   <schema_version>3.1</schema_version>
   <name>hpxm_lto_openstudio</name>
   <uid>b1543b30-9465-45ff-ba04-1d1f85e763bc</uid>
-  <version_id>5cbfd102-1753-4556-8163-e6ba38052941</version_id>
-  <version_modified>2025-01-02T23:44:23Z</version_modified>
+  <version_id>78d28973-41cf-482b-aab8-53b59beea41c</version_id>
+  <version_modified>2025-01-03T01:19:55Z</version_modified>
   <xml_checksum>D8922A73</xml_checksum>
   <class_name>HPXMLtoOpenStudio</class_name>
   <display_name>HPXML to OpenStudio Translator</display_name>
@@ -189,7 +189,7 @@
       <filename>airflow.rb</filename>
       <filetype>rb</filetype>
       <usage_type>resource</usage_type>
-      <checksum>7356370C</checksum>
+      <checksum>29D991BE</checksum>
     </file>
     <file>
       <filename>battery.rb</filename>
diff --git a/HPXMLtoOpenStudio/resources/airflow.rb b/HPXMLtoOpenStudio/resources/airflow.rb
index 40bce10e50..4646118e59 100644
--- a/HPXMLtoOpenStudio/resources/airflow.rb
+++ b/HPXMLtoOpenStudio/resources/airflow.rb
@@ -1707,9 +1707,10 @@ def self.apply_infiltration_to_garage(model, spaces, hpxml_bldg, infil_values, d
 
     space = spaces[HPXML::LocationGarage]
     area = UnitConversions.convert(space.floorArea, 'm^2', 'ft^2')
+    volume = UnitConversions.convert(space.volume, 'm^3', 'ft^3')
     hor_lk_frac = 0.4 # DOE-2 Default
     neutral_level = 0.5 # DOE-2 Default
-    sla = get_infiltration_SLA_from_ACH50(ach50, infil_values[:avg_ceil_height])
+    sla = get_infiltration_SLA_from_ACH50(ach50, volume / area)
     ela = sla * area
     c_w_SG, c_s_SG = calc_wind_stack_coeffs(hpxml_bldg, hor_lk_frac, neutral_level, space)
     apply_infiltration_to_unconditioned_space(model, space, nil, ela, c_w_SG, c_s_SG, duct_lk_imbals)