diff --git a/include/sorts.h b/include/sorts.h
index d4734f4..be13600 100644
--- a/include/sorts.h
+++ b/include/sorts.h
@@ -14,6 +14,7 @@ private:
     int lineCount;
     std::vector<std::string> originalWordList;
     std::chrono::duration<double> sortTime;
+    int heapSize; // Heap Sort only
 public:
     Sorter();
     std::vector<std::string> newWordList;
@@ -33,6 +34,10 @@ public:
     void __MergeSort__(int p, int r);
     void __Merge__(int p, int q, int r);
     void HeapSort(void);
+    void __HeapSort__(void);
+    void __Heapify__(int i);
+    int __LEFT__(int i);
+    int __RIGHT__(int i);
 };
 
 void CheckArguments(int argc, char* arguments[], Sorter* sortObj);
diff --git a/src/sorts.cpp b/src/sorts.cpp
index 2086912..6686a17 100644
--- a/src/sorts.cpp
+++ b/src/sorts.cpp
@@ -68,7 +68,7 @@ void Sorter::SortAll(void)
     for (int i = 1; i <= fileCount; i++)
     {
         lineCount = 0;
-        newFilename = "test/PERM/perm";
+        newFilename = "test/SORTED/sorted";
         newFilename += std::to_string(15*i);
         newFilename += "K.txt";
         SetFilename(newFilename);
@@ -233,9 +233,57 @@ void Sorter::__Merge__(int p, int q, int r)
 void Sorter::HeapSort(void)
 {
     auto start = std::chrono::system_clock::now();
-    ;
+    __HeapSort__();
     auto end = std::chrono::system_clock::now();
     sortTime = end - start;
+    return;
+}
+void Sorter::__HeapSort__(void)
+{
+    std::string tempStr;
+    // Build Max Heap
+    heapSize = newWordList.size();
+    for (int i = ((newWordList.size() / 2) - 1); i >= 0; i--)
+        __Heapify__(i);
+    // Heap Sort
+    for (int i = (newWordList.size() - 1); i >= 0; i--)
+    {
+        tempStr = newWordList[i];
+        newWordList[i] = newWordList[0];
+        newWordList[0] = tempStr;
+        heapSize = i;
+        __Heapify__(0);
+    }
+    return;
+}
+
+void Sorter::__Heapify__(int i)
+{
+    std::string tempStr;
+    int largest = i;
+    int leftIndex = __LEFT__(i);
+    int rightIndex = __RIGHT__(i);
+    if ((leftIndex < heapSize) && (newWordList[leftIndex] > newWordList[largest]))
+        largest = leftIndex;
+    if ((rightIndex < heapSize) && (newWordList[rightIndex] > newWordList[largest]))
+        largest = rightIndex;
+    if (largest != i)
+    {
+        tempStr = newWordList[i];
+        newWordList[i] = newWordList[largest];
+        newWordList[largest] = tempStr;
+        __Heapify__(largest);
+    }
+}
+
+int Sorter::__LEFT__(int i)
+{
+    return ((2 * i) + 1);
+}
+
+int Sorter::__RIGHT__(int i)
+{
+    return ((2 * i) + 2);
 }
 
 // Checks for command line arguments
diff --git a/test/SortTimes.txt b/test/SortTimes.txt
index 1453cc2..c01c614 100644
--- a/test/SortTimes.txt
+++ b/test/SortTimes.txt
@@ -1,30 +1,30 @@
-IS15 took 2.06461 s
-MS15 took 0.0154898 s
-HS15 took 5.4e-08 s
-IS30 took 8.38467 s
-MS30 took 0.0324445 s
-HS30 took 7.2e-08 s
-IS45 took 18.9657 s
-MS45 took 0.0506499 s
-HS45 took 5.3e-08 s
-IS60 took 34.2814 s
-MS60 took 0.069865 s
-HS60 took 4.7e-08 s
-IS75 took 54.3642 s
-MS75 took 0.0892599 s
-HS75 took 6.4e-08 s
-IS90 took 80.1745 s
-MS90 took 0.110413 s
-HS90 took 6e-08 s
-IS105 took 111.424 s
-MS105 took 0.130451 s
-HS105 took 6.8e-08 s
-IS120 took 149.645 s
-MS120 took 0.15206 s
-HS120 took 5.7e-08 s
-IS135 took 196.821 s
-MS135 took 0.169646 s
-HS135 took 6.4e-08 s
-IS150 took 250.343 s
-MS150 took 0.194482 s
-HS150 took 1.18e-07 s
+IS15 took 0.000852521 s
+MS15 took 0.0142171 s
+HS15 took 0.0216508 s
+IS30 took 0.00166257 s
+MS30 took 0.0296301 s
+HS30 took 0.0466942 s
+IS45 took 0.0025043 s
+MS45 took 0.0466391 s
+HS45 took 0.0730432 s
+IS60 took 0.00331285 s
+MS60 took 0.0630209 s
+HS60 took 0.10038 s
+IS75 took 0.00414368 s
+MS75 took 0.0804194 s
+HS75 took 0.129151 s
+IS90 took 0.00511297 s
+MS90 took 0.09825 s
+HS90 took 0.161143 s
+IS105 took 0.00584393 s
+MS105 took 0.121123 s
+HS105 took 0.191739 s
+IS120 took 0.00668049 s
+MS120 took 0.136146 s
+HS120 took 0.216863 s
+IS135 took 0.00745027 s
+MS135 took 0.152574 s
+HS135 took 0.245755 s
+IS150 took 0.00832467 s
+MS150 took 0.175396 s
+HS150 took 0.285888 s