Tankless Water Heater as a Heat Source with Domestic Hot Water

This is an example of how to set up a tankless water heater as a heat source and for your domestic hot water. This is called a closed loop heating system with domestic water.

 

This is only an example. Actual layouts vary from job to job. 

List of materials needed for a project like this (Click Link below to Purchase Product and see more Information)

Domestic Hot Water Side

Quantity 1 - Flat Plate Heat Exahangers (Size depends on system)

Quantity 2 to 4 - Ball Valves for Domestic Hot Water Side

Quantity 4 to 5 - Boiler Drain and Hose Bibs

Quantity 2 - Stainless Steel Pumps (For Domestic Side and Size Depends on System)

Quantity 2 - Pump Flanges (For Domestic Side and Most Likely 1 to 1 1/4 Inch)

Quantity 2 - Temperature Guages and Tees

Quantity 1 - Buffer Tank (Optional and you can use a standard Electric Tank)

Quantity 1 - Johnson Controls Temperature Controls (optional)

Quantity 1 - Pressure Relief Valve

  

Hydronic Heating Side (Trim)

Quantity 1 - Gas Tankless Water Heaters

Quantity 1 - Hydronic Heating Mixing Valves

Quantity 4 to 6 - Ball Valves for Hydronic Heating Side

Quantity 2 to 4 - Boiler Drain and Hose Bibs

Quantity 4 - Temperature Guages and Tees

Quantity 1 - Hydronic Heating Expansion Tanks

Quantity 1 - Cast Iron Pump (For Heating Side and Depends on System)

Quantity 1 - Pump Flanges (For Heating Side and Most Likely 3/4 Inch)

Qunatity 1 - Hydronic Circulator Switching Relay

Quantity 1 - Hydronic Heating Thermostats and Floor Sensors

Quantity 1 - Hydronic BackFlow Preventers and Combo AutoFill Valves

 

Hydronic Heating Side (Distribution)

Quantity X - Hydronic Radiant Heat Pex Tubing (Depends on Systyem)

Quantity X - Hydronic Radiators and Convectors (Depends on System)

 

X = Various Amounts of Product needed - dependant on actual system