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Hot Water Boiler with Primary Secondary Heating with 5 Zones and Indirect Hot Water Tank

This is an example of how to use a Gas Boiler to produce different water temperatures for 5 zones (High / Low Temperatures) plus a zone for the Indirect Hot Water Tank.

You will notice that in this example there are 3 possible temperatures for the heating zones. There are 3 zones for high temperature that can feed radiators or baseboard convectors at whatever the boiler water temperatures is set to. There are 2 zones for a set temperature that could be used for pex radiant heat zones at different water temperatures.

Hot Water Boiler with Primary Secondary Hydronic Heating with 5 Zones (High and Low Temperature) and Indirect Domestic Hot Water Tank

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)

Hydronic Heating Side (Trim)

Quantity 1 - Gas or Electric Heating Boiler

Quantity 1 - Indirect Storage Tank

Quantity 2 - Hydronic Heating Mixing Valves

Quantity 5 to 7 - Ball Valves for Hydronic Heating Side

Quantity 5 to 7 - Boiler Drain and Hose Bibs

Quantity 1 - Temperature Guages and Pressure Gauages and Tees

Quantity 1 - Cast Iron Pump (For Primary Pump - Only needed if Boiler does't have System Pump)

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

Quantity 1 - Webstone ProPal Series 5865 Primary Secondary Loop Purge Tee

Quantity 1 - Hydronic Heating Expansion Tank (only needed if Boiler does not have a Tank)

Quantity 5 - Cast Iron Pump (For Secondary Loop - Amount of Pump Depends on System)

Quantity 5 - Pump Flanges (For Secondary Loop Side and Most Likely 3/4 Inch)

Quantity 5 - Hydronic Heating Mixing Valves

Qunatity 1+ - Hydronic Circulator Switching Relay

Quantity 5+ - Hydronic Heating Thermostats and Floor Sensors

Quantity 1 - Hydronic BackFlow Preventers and Combo AutoFill Valves

Quantity 1 - Hydronic Air Eliminators, Air Separators, Air Scoops and Dirt Separators

Quantity 1 - Hydronic Boiler Pressure Relief Valves and Water Heater Relief Valves

Quantity 1 - Taco Flo Checks 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