Tankless Water Heater Closed Loop System

The water remains in the system and is constantly recycled through it.

Tankless water heater closed loop system.

I eliminated health concerns by using a closed system in which the dhw and heating loops are totally separate. Boilers tend to be in a closed loop system as such they are not usually found in water supply heating systems but for closed circuit heating systems including radiant floor heaters. If freeze protection is an issue than a closed system with anti freeze is a good idea. Creating the loop is fairly easy.

Timed operation is recommended over an aquastat with the timer programmed to recirculate in early morning and. Hot water circulation loops use a small pump to circulate hot water between a water heater and a distant bathroom or kitchen. Many people use these terms interchangeably but the reality is that they are very different. An open water heater system is when water that increased its volume and pressure due to the heating freely goes from the storage tank into the cold water supply line and eventually into the municipal water system if the pressure is high enough.

Hot water heater a hot water heater is used to give you domestic hot water for your appliances like dishwashers and washing machines as well as fixtures like showers and sinks. This is an example of how to set up a tankless water heater as a heat source and for your domestic hot water. Tips when installing a tankless recirculation system. Actual layouts vary from job to job.

Above the air handler is a smaller box containing the cooling coil. To protect the unit you must consider an open or closed water heater system. This space heating system is a hydro air system using a rheem tankless water heater seen on the left. The down side is two heat sources.

The tankless water heater also provides domestic hot water. All water heaters waste heat energy even when the burner is off and the unit is sitting idle between heating cycles. They both heat hot water this is true but their function is different. This is only an example.

Closed systems are often used in second homes or primary residences in areas prone to long power outages. Minimize the length of the run from the tankless water heater to the recirculation loop maximum 5 recommended. The box on the floor lower right is an air handler that includes a copper heat exchange coil. This is called a closed loop heating system with domestic water.

However doing so in a way that doesn t waste a lot of energy is a little trickier. Water heated by the tankless heater flows directly through the floor tubing while a heat exchanger provides heat for the dhw supply.