High Efficiency Boilers: How modulation improves efficiency

During the dead of winter many boilers work overtime.  The cold weather requires boilers to operate at full  throttle to keep up with the heat lost from the house.  During the spring and fall the heat loss decreases dramatically, reducing the load on the boiler.  Traditional boilers are not capable at running at lower outputs so they turn on and off more frequently.  While this uses less fuel than running continuously at high output, it is less efficient in terms of heat per unit of natural gas, propane, or oil. High efficiency boilers are able to throttle back their output.  This is known as modulation.  Modulating boilers determine the amount of heat required (by using outdoor reset) and adjust their firing rate as low as possible to meet the heating needs.  Boilers are more efficient when they operate at lower temperatures.  Operating at lower temperatures also reduces the cycling of the boiler which further improves the efficiency.   Triangle Tube designs and manufactures only high efficiency modulating condensing boilers.  Their broad line meets nearly any home size and even includes combination boilers that provide both space heating and hot water.  For more information on Triangle Tube’s Prestige, Challenger, and Keystone boilers contact your Triangle Tube factory trained representative today. - See more at: http://blog.triangletube.com/#sthash.2j5T66fV.dpuf