I want to tell you that we are very impressed with the performance of the 1/2 HP Penguin Chiller. We are using it to chill and maintain our 110g Lobster Tank and maintain 50 degrees fahrenheit. It only cycles about 10-15% because of the insulation in the tank. It runs so quiet and efficient. This Penguin Chiller was the answer for a difficult location install. Wishing you much success.