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Wikipedia about furnace

A furnace is a device used for heating. The name derives from Latin fornax, oven.

In American English, the term furnace on its own is generally used to describe household heating systems based on a central furnace (known either as a boiler or a heater in British English), and sometimes as a synonym for kiln, a device used in the production of ceramics. In British English the term furnace is used exclusively to mean industrial furnaces which are used for many things, such as the extraction of metal from ore (smelting) or in oil refineries and other chemical plants, for example as the heat source for fractional distillation columns.

The term furnace can also refer to a direct fired heater, used in boiler applications in chemical industries or for providing heat to chemical reactions for processes like cracking, and is part of the standard English names for many metallurgical furnaces worldwide.

The heat energy to fuel a furnace may be supplied directly by fuel combustion, by electricity such as the electric arc furnace, or through induction heating in induction furnaces.

Household Furnaces

A household furnace is a major appliance that is permanently installed to provide heat to an interior space through intermediary fluid movement, which may be air, steam, or hot water. The most common fuel source for modern furnaces in the United States is natural gas; other common fuel sources include LPG (liquefied petroleum gas), fuel oil, coal or wood. In some cases electrical resistance heating is used as the source of heat, especially where the cost of electricity is low.

Combustion furnaces always need to be vented to the outside. Traditionally, this was through a chimney, which tends to expel heat along with the exhaust. Modern high-efficiency furnaces can be 98% efficient and operate without a chimney. The small amount of waste gas and heat are mechanically ventillated through a small tube through the side or roof of the house.

  • "High-efficiency" in this sense may be misleading, because furnace efficiency is typically expressed as a "first-law" efficiency, whereas the energy efficiency of a typical furnace is much lower than the first-law thermal efficiency. By comparison, cogeneration has a higher energy efficiency than is realizable from burning fuel to generate heat directly at a moderate temperature. However, as the vast majority of consumers (as well as many government regulators) are unfamiliar with exergy efficiency, Carnot efficiency, and the Second Law of Thermodynamics, the use of first-law efficiencies to rate furnaces is well-entrenched.

Modern household furnaces are classified as condensing or non-condensing based on their efficiency in extracting heat from the exhaust gases. Furnaces with efficiencies greater than approximately 89% extract so much heat from the exhaust that water vapor in the exhaust condenses; they are referred to as condensing furnaces. Such furnaces must be designed to avoid the corrosion that this highly acidic condensate might cause and may need to include a condensate pump to remove the accumulated water. Condensing furnaces can typically deliver heating savings of 20%-35% assuming the old furnace was in the 60% Annual Fuel Utilization Efficiency (AFUE) range.

Search results for Furnace

Blast furnace - Wikipedia, the free encyclopedia

An illustration of furnace bellows operated by waterwheels, from the Nong Shu, ... He suggests that early blast furnace and cast iron production evolved from ...en.wikipedia.org/wiki/Blast_furnace

York UPG: Homeowners: Furnace

York® Heating and Air Conditioning ... The furnace is the indoor unit that heats and circulates warm air through your ... components of a furnace system are: ...www.yorkupg.com/homeowners/furnace.asp

Furnaces | Gas Furnaces | Home Heating System | High Efficiency Furnace ...

Complete list of home furnaces, high efficiency gas furnaces, home heating systems, oil furnaces, and more from Lennox, the leader in home heating and cooling.www.lennox.com/products/list.asp?type=2

Furnace Town Heritage Museum - Snow Hill, MD

A Historical Site ... The furnace produced pig iron from 1831 until 1850. For a while the furnace flourished and became a center of commerce for the area. ...furnacetown.com/index.htm

BuyFurnace.org

Provides information on selecting a furnace, humidifier, heat pump, or home heating system. Also lets users compare brands or locate local furnace dealers.www.buyfurnace.org/

Images found for Furnace

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furnace_tuneup.jpgFurnace9.jpg20001101_Furnace_Tune-up_page002img001_size2.jpg
20001101_Furnace_Tune-up_page002img001.jpgBlastFurnaceAtNight.jpgBlast Furnace - PCI diagram.jpg

News about Furnace

Furnace oil prices down for 24 hours

CBC New BrunswickThe clock is ticking for New Brunswick residents who want to save money on their heating oil bill because a price cut will likely last only 24 hours.http://www.cbc.ca/canada/new-brunswick/story/2008/10/01/furn...

Thieves siphon furnace oil

The Sudbury StarThieves siphoned furnace oil from a holding tank a home on Imperial Street South in Massey, the OPP said. The theft took place from Sept. [...]http://thesudburystar.com/ArticleDisplay.aspx?e=1224612

News 88.9

News 88.9SAINT JOHN, NB - As predicted the price of furnace oil has shot back up after the interrupter clause was invoked yesterday. Furnace oil is up 7.2 cents to $119.4 cents a litre.http://www.news889.com/news/local/article.jsp?content=200810...

Quick work will quell creepy basement noises

The News JournalThe basement of the house we grew up in had a clanking furnace, rumbling water heater and banging pipes. Damp, dark and musty, it housed boxes and boxes of canned goods and who knows what else.http://www.delawareonline.com/article/20081002/LIFE04/810020...

Is Your Furnace Ready To Heat It Up?

WCMH ColumbusOur days are growing shorter and our nights chillier. Do you know if your furnace is ready to heat things up?http://www.nbc4i.com/midwest/cmh/news.apx.-content-articles-...

News about Furnace

Federal Aid for High Heating Costs

KFYR-TVPeople already struggling to pay for high food and gas prices will have another added expense when they turn up the furnace this winter. There`s concern that there won`t be as much federal aid available. Some in Congress are pressing for more money ... http://www.kfyrtv.com/News_Stories.asp?news=22184

Trim your bill

Chicago TribuneChange or clean your furnace filter at least once a month. Clogged filters reduce airflow and make your furnace work harder.http://www.chicagotribune.com/business/chi-wed-natural-gas-b...

Six workers rushed to hospital after another Assmang explosion

WitnessYesterday’s incident, the result of the explosion inside furnace five, happened at about 2 pm. The company’s senior general manager, Princess Twala, said the explosion happened when a malfunctioning electrode caused a chemical paste to run into ... http://www.witness.co.za/index.php?showcontent&global[_id]=1...

India Port Conditions: Mumbai

Reuters IndiaFurnace Oil; HSO:High Speed Oil; I.Sand:Industrial Sand; C.Oil:Crude oil; G.Cargo:General Cargo; P.Acid:Phosphoric Acid; A.Nitrate:Ammonium Nitrate;http://in.reuters.com/article/domesticNews/idINBNG3502092008...

New high school would serve students, community well

Kodiak Daily MirrorThe furnace has trouble blowing soot, and surfaces need to be cleaned daily. It is time for citizens of Kodiak Island to build a new high school.http://www.kodiakdailymirror.com/?pid=19&id=6657

Search results for Furnace

The Furnace - Birmingham's Premier Gentlemen's Club

A Club Like No Other; Fine Dining at The Furnace; Party Packages; Getting to The Furnace; Get In Touch With The Furnacehttp://thefurnacebham.com

WaterFurnace - Smarter from the Ground Up™

Geothermal energy systems also known as geo-thermal, geoexchange, geo-exchange, ground-water, ground-water assisted, ground-water-source, water-to-water, or water furnace heat ... http://www.waterfurnace.com/

Furnace Mountain - Home

Welcome to our website. Furnace Mountain consists of Dave VanDeventer on Fiddle and Vocals, Morgan Morrison on Bouzouki and Vocals, and Aimee Curl on Bass and Vocals, and includes ... http://www.furnacemountain.com/

Portable Furnace, Infrared Heater for Small Spaces, Portable Garage ...

Portable furnace, infrared heater for small spaces, portable garage heater, mobile home heater by Arbaco.http://portablefurnace.net

Furnace MFG : CD Duplication - DVD Duplication - CD Replication - DVD ...

Furnace MFG is a world leader in CD Replication, DVD Replication, CD Duplication, DVD Duplication, Design, Print and Packaging.http://www.furnacecd.com/
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Videos found for Furnace

RUNESCAPE GUIDE TO BLAST FURNACE

RUNESCAPE GUIDE TO BLAST FURNACEThe Blast Furnace is a mini-game in which you can participate in and have an opportunity to smelt using only having to use 1 coal for steel bars 2 for mithril 3 for adamantite and...Flash - Video

Blood Furnace - The Maker

Blood Furnace - The MakerHe wants to make you his midless slave smoothie. You might prefer banana.Flash - Video

Tomb Raider 2: The Golden Mask - Fu...

Tomb Raider 2: The Golden Mask - Furnace of the Gods 2/3Tomb Raider 2: The Golden Mask - Furnace of the Gods (2) walkthrough Secrets - 3 of 3Flash - Video

Charging the Glass Furnace 2300 Deg...

Charging the Glass Furnace 2300 Degrees FThis is the process in which the crucible or high heat ceramic pot inside of the glass furnace is refilled with the raw materials called batch that will cook down to for our clear...Flash - Video

Home Made Solar Furnace

Home Made Solar FurnaceA home made solar heater in Eastern Canada generates free heat by harnessing the solar energy of the sunFlash - Video

Videos found for Furnace

Furnace 2003_web.wmv

Furnace 2003_web.wmvMojave Road Video of Adam Hareball 2003 Race Video Furnace 2003 Race Video ** Jason Walton racing a 1999 Yamaha YZ250msmedia: 14.7 MB w:320px - h:240px

First Furnace Burn - First Furnace ...

First Furnace Burn - First Furnace BurnFirst Furnace Burn - First Furnace Burn burn - aluminummsmedia: 20.6 MB w:320px - h:240px

WoW:Burning Crusade - Blood Furnace...

WoW:Burning Crusade - Blood Furnace Gameplay Part #1Venture into the depths of the Blood Furnace.wmv: 0 MB w:480px - h:360px

WoW:Burning Crusade - Blood Furnace...

WoW:Burning Crusade - Blood Furnace Gameplay Part #2The journey continues into the bowels of the Blood Furnace.wmv: 0 MB w:480px - h:360px

WoW:Burning Crusade - Blood Furnace...

WoW:Burning Crusade - Blood Furnace Gameplay Part #3Adventure awaits those that dare to enter the Blood Furnace.wmv: 0 MB w:480px - h:360px

Answers for Furnace

Dilbert

Does an electric furnace cost the same amount to buy and install as a gas furnace?

Dilbertyou can buy a air handler however you want to buy it. with the evaporator attached or seperate. typically its a matched system if its new. id say around 2000 bucks for just A coil with electric hea...
James Y

How do you install a gas furnace?

James YIf the furnace is appropriately sized, then yes. If you are comfortable in doing the work where you are confident that you won't have a gas leak and a drip tube exists and have good wiring skills, th...
Glenn

Why is my natural gas furnace making buzzing sounds?

GlennWell you got all the smart answers, now I'll try to actually held you. Your gas furnace has a blower motor. There usually is a metal access panel over the internal parts of the furnace. Next time y...
kma22263

Is shutting off the furnace a few hours a day a good way to save heat?

kma22263I would not turn off the furnace completely for many reasons. It is very hard on your furnace when you do turn it on it has to work that much harder. Also it is very hard on your house. You are coolin...
thatgirl

What is involved in getting your furnace serviced?

thatgirlalong with changing your filer every 2 months you should have the furnace serviced or [clean and checked]because they will check for cracked heat exchanger.oil the moter,adjust air/gas mixture,and vis...

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