diff --git a/crawler/rec/floorplan.py b/crawler/rec/floorplan.py
index 562ab08..98c588a 100644
--- a/crawler/rec/floorplan.py
+++ b/crawler/rec/floorplan.py
@@ -18,12 +18,13 @@ def inference(image_path):
 
 
 def extract_total_sqm(input_str: str):
-    sqmregex = r"(\d+\.\d*) ?(sq ?m|sq. ?m)"
+    sqmregex = r"(\d+\.?\d*) ?(sq ?m|sq. ?m)"
     matches = re.findall(sqmregex, input_str.lower())
-    if len(matches) == 0:
-        return None
     sqms = [float(m[0]) for m in matches]
-    return max(sqms)
+    filtered = [sqm for sqm in sqms if 30 < sqm < 160]
+    if len(filtered) == 0:
+        return None
+    return max(filtered)
 
 
 def calculate_model(image_path):