Indirect Hot Water Heaters

Triangle Tube Phase III Water Heaters... High Efficiency, Low Annual Operating Cost

If you already have an efficient boiler, why not consider adding a Phase III Indirect hot water heater? These water heaters use your boilers hot water to heat a stainless steel water tank that provides domestic water for your home. This system provides abundant hot water while requiring only one burner to maintain.

Superior Design “Tank-in-Tank” Technology

Superior Heat Exchange Surface Area
The domestic storage tank is constructed of stainless steel and is surrounded by boiler water in the outer tank, resulting in a full “wrap around” heat exchanger. Its superior heat exchange surface (typically 1.5 to 2.5 times larger than a traditional coil) makes for a large volume of hot water in a short period of time.  Thanks to this fast recovery, the storage capacity can be reduced, resulting in a reduced thermal loss.  

Stainless Steel Tank Construction
The inner domestic storage tank is constructed of durable, corrosion resistant stainless steel.

Optimal Insulation
The Phase III, TR Series and Smart Series, are insulated with 2” of either sprayed-on or injected polyurethane, foam, resulting in a stand by heat loss of less than 1 /hr.

Self Cleaning/Self de-scaling
The inner, domestic tank is suspended within the outer tank so it is free to expand and contract as the pressure varies during hot water draws.  Moreover, its corrugations amplify the movement and prevents the lime build up on the heat exchanger; thus maintaining its performance during the Phase III ‘s life span.  

• Anti-Bacteria Growth/Maintenance Free;

• The “Tank-in-Tank” design allows us to store domestic water at higher temperatures preventing bacteria growth.

• Additionally, constructed of high quality stainless steel, Phase III does not require a protective anode.  

How Phase III Works
When the Phase III thermostat in the inner tank calls for heat, the boiler and circulator start.  Boiler water is circulated around the outer tank and heats the domestic water in the inner tank.  After transferring its heat, boiler water is returned to the boiler to be re-heated.  When the thermostat in the inner tank reaches its pre-set mark, the boiler and circulator shut off.