Tankless Water Heater Closed Loop System

They are either a tank or tankless style and can be gas or electric.

Tankless water heater closed loop system.

The tankless water heater also provides domestic hot water. Insulate all hot water pipes to minimize standby energy loss. Water heated by the tankless heater flows directly through the floor tubing while a heat exchanger provides heat for the dhw supply. Water boiler a boiler is used to heat just the water as it boils the water and turns it to steam.

A continuously operating pump is clearly wasteful. Creating the loop is fairly easy. This is called a closed loop heating system with domestic water. Minimize the length of the run from the tankless water heater to the recirculation loop maximum 5 recommended.

They can be used with radiators or radiant floor heating. This is an example of how to set up a tankless water heater as a heat source and for your domestic hot water. Actual layouts vary from job to job. The advantages of a continuously active heat exchanger loop are twofold.

The box on the floor lower right is an air handler that includes a copper heat exchange coil. Closed loop radiant heating systems are the more preferred option for most plumbers but are also more expensive due to the need for a secondary heating unit to be installed for optimal heating purposes. These are for closed systems usually called hydronic systems and they are just for heating. Above the air handler is a smaller box containing the cooling coil.

This is only an example. A hot water loop uses a small pump to circulate hot water between a water heater and a distant bathroom or kitchen. The water from the boiler to this heat exchanger flows 24 hours a day in a closed loop making the heat exchanger continuously active i e. Timed operation is recommended over an aquastat with the timer programmed to recirculate in early morning and evening when demand for hot water is greatest.

This space heating system is a hydro air system using a rheem tankless water heater seen on the left. Whenever needed the storage tank draws heat from the heat exchanger and maintains a constant tank temperature. However doing so in a way that doesn t waste a lot of energy is a little trickier. Tips when installing a tankless recirculation system.

These systems are typically connected to a source that s heats the water such as a boiler or a tankless water heater in which the heating. Tankless water heater as a heat source with domestic hot water.