Products You Can Trust
Whatever your need may be, you can trust that you’re installing a product that is produced to the highest standards.
Learn More
Indirect Fired Water Heaters
Triangle Tube offers a wide range of Indirect Fired Water Heaters for all uses. Featuring Exclusive tank-in-tank technology and our newest all Stainless Steel Coil Type Indirect Water Heater. Our Indirect Fired Water Heaters are perfect fits for all of your hot water needs.
Smart 316 is upgraded to 316L stainless steel inner tank-acid pickling for increased corrosion resistance, state-of-the-art welding procedures & improved dry well testing for longer life.
Exclusive "Tank-in-Tank" Technology
Self Cleaning/Self Descaling Design
7 Sizes to Choose From
This stainless steel indirect water heater is available in several sizes ranging from 30 to 120 gallons, providing ample hot water.
All Stainless Steel Construction
1" Boiler Connections
Product Comparison
Model | Smart 316 | Cardinal |
|---|---|---|
Diameter | 22” to 32" | 22.25” to 32" |
Height | 38” to 72" | 40.50” to 73" |
Boiler / Supply Return (MNPT) | 1”, 1.25”, 1.50”, 2" | 1" |
Domestic Inlet / Outlet (MNPT) | 0.75” or 1.50" | 3/4” to 1" |
Auxiliary DHW Connection (MNPT) | 3/4” to 1 1/2" | 3/4” to 1" |
T&P Connection (FNPT) | 3/4" | 3/4" |
Drain Connection (FNPT) | N/A | 1/2" |
Coil Capacity (Gal.) | N/A | 1.3 to 3 |
Heating Water Cap (Gal.) | 5 to 43 | N/A |
DHW Water Capacity (Gal.) | 28 to 119 | 31 to 119 |
Standby Loss, F/h | 1 to 0.3 | 1 to 0.3 |
Heating Surface (Sq. Ft.) | 13 to 42 | 8.50 to 21.50 |
Weight - Empty (Lbs.) | 115 to 479 | 62 to 174 |
Weight - Shipping (Lbs.) | 125 to 495 | 76 to 208 |
Boiler Output (Btu/Hr) | 87,000 to 420,000 | 121,000 to 253,000 |
First Draw (Gal/Hr) | 23 to 101 | 25 to 101 |
1st Hour Rating (Gal/Hr) | 140 to 650 | 214 to 486 |
Continuous Flow (Gal/Hr) | 115 to 560 | 189 to 385 |
Pump Requirements | 14 GPM / 4' | 14 GPM / 2.8’ to 14 GPM / 6.7' |