02/15/2018
Boilers are pressure vessels designed to transfer heat that is produced by combustion into a fluid.
They include:
>Low-Pressure Boilers (Maximum pressures of 15 psig steam and up to 16 psig hot water)
>High-Pressure Boilers (Operate above 15 psig steam and above 160 psig hot water)
>Steam Boilers (Generally 60,000 BTU/h to over 100,000 BTU/h)
>Water Boilers (Generally 35,000 BTU/h to over 100,000 BTU/h)
>>Condensing vs. Non-Condensing
Condensing boilers (water heaters) are fueled by gas or oil and achieve a high efficiency through condensation of water v***r in exhaust gases. As a result, they are able to recover the latent heat through v***rization which would have otherwise been lost. To achieve maximum durability and reliability over an extended product life, condensing boilers should be corrosion resistant along the heater exchanger and fireside combustion chamber.