Triangle Tube Reviews and Ratings

Net I=B=R Capacity (BTU)

I=B=R, also referred to as Net Output or AHRI Capacity, is the rated heat output of a boiler after accounting for combustion efficiency, piping loss, and an extra pickup factor. We recommend sizing steam boilers based on the I=B=R rating. -

Enter Net I=B=R Capacity (BTU) Range Minimum Value To Enter Net I=B=R Capacity (BTU) Range Maximum Value

60000 - 69999 (1)

150000 - 159999 (2)

240000 - 249999 (1)

DOE Heating Capacity (BTU)

Also referred to as Gross Output, this is the output of a boiler after accounting for combustion efficiency. We recommend sizing hot water boilers based on the DOE Heating Capacity. -

Enter DOE Heating Capacity (BTU) Range Minimum Value To Enter DOE Heating Capacity (BTU) Range Maximum Value

70000 - 79999 (1)

180000 - 189999 (2)

270000 - 279999 (1)

Maximum Input Capacity (BTU)

The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used. -

80000 - 99999 (1)

180000 - 199999 (2)

280000 - 299999 (1)

AFUE (%)

AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace. Learn More -

93 (1)

95 (3)

Fuel Type

To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat. -

Indirect Fired (6)

Natural Gas (4)

Ultra Low NOx Emissions

NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More -

No (2)

Yes (2)

Product Line +

Challenger Solo (1)

Instinct (2)

Prestige (1)

Prestige Solo (1)

Smart (6)

Storage Volume (Gallons) +

119 (1)

28 (1)

36 (1)

46 (1)

56 (1)

70 (1)

First Hour Delivery (Gallons)

Sometimes called First Hour Rating, this is the number of gallons of hot water the heater can supply per hour when starting with a fully heated tank. The recovery of the water heater depends on your boiler's BTU and boiler output temperature. +

200 - 259 (1)

260 - 319 (1)

320 - 379 (1)

620 - 679 (1)

680 - 739 (1)

860 - 919 (1)

Product Status

Available (11)

Discontinued (1)