Triangle Tube is best known for two things: feats of hydronic innovation and incredibly efficient products. These qualities are intertwined in Triangle Tube's Smart Series Indirect Fired water heaters. The Smart water heaters feature an exclusive "tank-in-tank" design that Triangle Tube has been refining for three decades. To heat domestic water, the outer tank of the Smart 120 fills with boiler water and the surface of the inner tank becomes a heat exchanger. Two inches of polyurethane insulation ensures that your domestic hot water stays hot, and stainless steel construction of the inner tank provides exceptional durability. When it comes to making a decision on your next water heater, the Smart lives up its name.

• Tank-in-Tank Efficiency
• Using boiler water as a heat source for the Smart 120 means that whenever your boiler fires it is providing heat not just for your home, but for your water as well.
• Tank-in-Tank Safety
• High temperatures prevent the growth of bacteria. High quality stainless steel and Triangle Tube's tank-in-tank design allow your domestic hot water to be stored at higher temperatures than traditional water heaters.

• The large surface area of the inner tank means that water is heated very quickly. Smart Series Indirect Fired water heaters boast a recovery rate up to 300% greater than that of conventional water heaters.
• Self-Cleaning
• The inner tank of the Smart 120 is contoured to promote water movement. This design prevents lime build-up in your water heater and keeps it running efficiently.
• Incredible Recovery Rate

• Type: Indirect Water Heater
• Product Line: Smart
• Fuel Type: Indirect Fired
• Storage Type: Tank
• Coils Quantity: 1
• Connection Type: NPT
• First Hour Delivery: 915 Gallons
• Continuous Recovery Rate: 820 Gallons
• Storage Volume: 119 Gallons
• Cold Water Inlet: 1 1/2 Inches
• Hot Water Outlet: 1 1/2 Inches
• Supply Connection: 2 Inches
• Return Connection: 2 Inches
• Product Height: 75 Inches
• Product Width: 32 Inches
• Product Depth: 32 Inches
• Product Weight: 479 Pounds
• Shipping Weight: 488 Pounds
• ETL Listed: Yes
• ISO Certified: Yes
• Parts Warranty: 1 Year
• Vessel Warranty: 10 Years