06-11-2013, 05:18 PM
The more liquid there is the better the heat transfer is so it is when the tank gets low that you run into problems.
What you probably experienced was that the water leaving the heater got hot enough that it shut the burner off (reached its set-point). As soon as the burner goes off the water leaving the heater cools down and the burner lights again. Takes a few seconds and so you get a slug of cold water. This is a fairly common complaint for tank-less water heaters. If the flame is adjustable, set it for low flame with the result that you will be using almost pure hot water in the shower. When you have it set hot you tend to mix cold in and that means less water through heater and that smaller amount gets too hot. Also check that your shower head is not crudded up and passing less flow. Clean it or get a higher flow shower head.
I plan on using the 5-gallon tanks so we'll see.
What you probably experienced was that the water leaving the heater got hot enough that it shut the burner off (reached its set-point). As soon as the burner goes off the water leaving the heater cools down and the burner lights again. Takes a few seconds and so you get a slug of cold water. This is a fairly common complaint for tank-less water heaters. If the flame is adjustable, set it for low flame with the result that you will be using almost pure hot water in the shower. When you have it set hot you tend to mix cold in and that means less water through heater and that smaller amount gets too hot. Also check that your shower head is not crudded up and passing less flow. Clean it or get a higher flow shower head.
I plan on using the 5-gallon tanks so we'll see.