Tankless Water Heater Temperature Drop

Insulate your heater s water pipes.

Tankless water heater temperature drop.

This may seem like a no brainer but many people fail to insulate the piping that makes up their best tankless water heater. If your household water is hard by lowering the temperature of your water heater you may delaying the deposition of mineral. That same unit may drop to a flow rate of 5 3 gpm in washington d c. It takes only 5 seconds.

One of the lesser known downsides of tankless water heaters is that they have difficulty achieving a lukewarm water temperature. Shut off all the power to the water heater. Increase the temperature to approximately 125 130 f or higher if needed. Since tankless water heaters need a minimum amount of water flow before activating there s a gap between completely cold water and the coolest warm water that you can create with a hot and cold water mix.

Before you begin set your temperature to 150 f and let hot water run through the heater for about a minute. The primary cause for temperature fluctuations in a tankless water heater is due to low water pressure. A particular unit may provide a flow rate of 8 0 gpm in florida where the temperature rise is only 30 degrees. Not the end of the world since there are very few scenarios.

Clearly both of these factors are critical considerations when sizing a tankless water heater. 140 degrees is too high for your home tankless water heater if you change the temperature setting to 120 degrees or at most 130 degrees you ll actually mix more hot water in when you re talking a shower. Isolate the heater by closing the incoming outgoing water isolation valves. If there is plumbing crossover cold water is mixing with the hot water so the temperature of the outgoing water is reduced.

If the water flow in your tankless water heater is too low and dips below the flow activation rate the main gas burner will turn itself off. Where the temperature rise is 65 degrees. And this lack of insulation means that the water being delivered into your heater will be noticeably cooler particularly if the pipes pass through a cold area than it could be. Water flow might be reduced when the water filter or fixture aerator are clogged.

Prevent to be scalding if you have a child and elderly member in your home they are more vulnerable to scalding by hot water of 140 f.