diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..87c84f2
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "data_submodule/DSSG2023-Heating-Loads-Data"]
+	path = data_submodule/DSSG2023-Heating-Loads-Data
+	url = git@github.com:uwescience/DSSG2023-Heating-Loads-Data.git
diff --git a/data_submodule/DSSG2023-Heating-Loads-Data b/data_submodule/DSSG2023-Heating-Loads-Data
new file mode 160000
index 0000000..b881ebd
--- /dev/null
+++ b/data_submodule/DSSG2023-Heating-Loads-Data
@@ -0,0 +1 @@
+Subproject commit b881ebdc7dcee75006706be71343dd0fee454469