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High efficiency condensing gas furnaces typically achieve between 90% and 98% AFUE. [3] A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as compared to a mid-efficiency forced-air or forced-draft furnace, is the ...
Wood and coal had long been used as fuel for glassmaking. An alternative fuel, natural gas, became a desirable fuel for making glass because it is clean, gives a uniform heat, and is easier to control. [9] In the United States, gas and oil began replacing coal as a fuel for glassmaking in the 1870s—where it was available. [10]
A furnace can be lit by a small pilot flame or in some older models, by hand. Most pilot flames nowadays are lit by an ignition transformer (much like a car's spark plugs). The pilot flame in turn lights up the main flame. The pilot flame uses natural gas while the main flame can use both diesel and natural gas. When using liquid fuels, an ...
The natural gas is fed to buildings from a main gas line. The duct work supplying the hot air (and sometimes cool air if an AC unit is tied into the system) may be insulated. A thermostat starts and stops the furnace to regulate temperature. Large homes or commercial buildings may have multiple thermostats and heating zones, controlled by ...
Close-up of flames on a natural gas furnace burner in the HVAC system of a suburban home in San Ramon, Calif., Dec. 29, 2019. (Photo by Smith Collection/Gado/Getty Images) (Smith Collection/Gado ...
Primary energy sources may be fuels like coal or wood, oil, kerosene, natural gas, or electricity. Compared with systems such as fireplaces and wood stoves, a central heating plant offers improved uniformity of temperature control over a building, usually including automatic control of the furnace.
Wison Offshore & Marine [2] is a division of the Wison Group in the upstream oil and gas industry. [6] This subsidiary focuses on design, project management, construction and operations of offshore oil projects. These include fixed platforms and modules, offshore lifting equipment mooring systems, and other types of oil and gas developments. [12]
An alternative fuel, gas, became a desirable fuel for making glass because it is clean, gives a uniform heat, is easier to control, and melts the batch of ingredients faster. Gas furnaces for making glass were first used in Europe in 1861. [10] In early 1886, a major discovery of natural gas occurred near the small village of Findlay, Ohio. [11]
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