edgepedia

Technology and the built world

61,984 articles

Heathrow Terminal 1

Heathrow Terminal 1, also known as London Heathrow Terminal 1, was a passenger terminal at London Heathrow Airport that operated from 1968 until its closure in 2015.

Heathrow Terminal 2

Heathrow Terminal 2, officially The Queen's Terminal, is a passenger terminal at London Heathrow Airport opened in 2014 as the home of Star Alliance airlines.

Heathrow Terminal 3

Heathrow Terminal 3, opened in 1961 as the Oceanic Terminal, is a passenger terminal at London Heathrow Airport serving over 20 airlines, including Virgin Atlantic.

Heathrow Terminal 5

Heathrow Terminal 5, opened by Queen Elizabeth II in March 2008, is Heathrow's largest terminal, built for £4.3 billion and used exclusively by British Airways and Iberia.

Heathrow Terminals 2 & 3 tube station

Heathrow Terminals 2 & 3, originally Heathrow Central, is a London Underground station on the Piccadilly line serving Heathrow Airport, opened by Queen Elizabeth II in 1977.

Heating element

A heating element, sold for stove ranges under the Calrod name, converts electricity into heat through resistance. Most use nichrome wire, built into toasters, ovens, water heaters, and furnaces.

Heating oil

Heating oil is a petroleum distillate fuel burned in boilers and furnaces for space and water heating, closely related to diesel and used mainly by households in the US Northeast.

Heating seasonal performance factor

The heating seasonal performance factor (HSPF) measures the heating efficiency of residential air-source heat pumps as total seasonal heating output in Btu divided by electricity used in watt-hours.

Heating, ventilation, and air conditioning

Heating, ventilation, and air conditioning (HVAC) is the technology and equipment that controls temperature, humidity, ventilation, and indoor air quality in buildings, from room units to central systems.

Heaton TMD

Heaton TMD, also known as the Heaton TrainCare Centre, is a railway maintenance depot in Newcastle upon Tyne operated by Northern Trains, opened by the York, Newcastle and Berwick Railway in 1847.

Heaven Hill

Heaven Hill is an American distilled spirits company founded in 1935 in Bardstown, Kentucky, owned by the Shapira family and known for Evan Williams and Elijah Craig.

Heavy ANFO

Heavy ANFO is a blend of ANFO and emulsion explosive used as a bulk blasting agent in mining, adding density and water resistance at lower cost than emulsion.

Heavy bomber

A heavy bomber is a large, long-range military aircraft built to carry substantial bomb loads against strategic targets deep in enemy territory, distinct from medium and light bombers.

Heavy cruiser

A heavy cruiser is a warship armed with guns of 8-inch (203 mm) caliber, a category created by the interwar naval disarmament treaties of 1922 and 1930.

Heavy equipment

Heavy equipment, also called construction vehicles or earthmoving equipment, is a class of large machines like excavators, bulldozers, loaders, and cranes used in construction, mining, and agriculture.

Heavy Equipment Transport System

The Heavy Equipment Transport System, also known as the HET (Heavy Equipment Transporter), is the U.S. Army's M1070 tractor and M1000 semitrailer for moving main battle tanks.

Heavy Expanded Mobility Tactical Truck

The Heavy Expanded Mobility Tactical Truck (HEMTT) is a family of 8-wheel drive tactical trucks built by Oshkosh Defense for the United States Army since 1982.

Heavy industry

Heavy industry is the branch of industry producing capital goods and basic materials like steel, cement, and chemicals in large plants, selling mainly to other industries and governments.

Heavy lift ship

A heavy lift ship is a specialized dry cargo ship carrying cargoes too heavy, large, or awkward for ordinary vessels, from locomotives and port equipment to drilling rigs.

Heavy machine gun

A heavy machine gun is a belt-fed automatic weapon firing 12.7 mm to under 20 mm ammunition, typically vehicle-mounted with an effective range of 2,000 meters.

Heavy tank

A heavy tank is a tank class defined by high combat weight and a breakthrough role, seen in World War II types like the Tiger and IS-2.

Heavy-duty pickup

A heavy-duty pickup is a full-size pickup truck in US Classes 2b and 3, built to tow and haul beyond light-duty trucks, led by Ford Super Duty, GM HD, and Ram HD models.

Heavy-hexagon code layout

The heavy-hexagon code layout, or heavy-hex, is a qubit connectivity arrangement with no qubit coupled to more than three neighbors, adopted by IBM Quantum in 2021.

Hebbia

Hebbia is a New York artificial intelligence company founded in 2020 by George Sivulka while a PhD student at Stanford; its Matrix platform searches and analyzes large collections of documents, primarily for institutional finance.

Hebei Cangdong power station

Hebei Cangdong power station (沧东电厂), also called the Cangdong Power Plant, is a coal-fired combined heat and power plant at Huanghua Port in Cangzhou, Hebei Province, China.

Hebei Construction & Investment Group

Hebei Construction & Investment Group, known abroad as HECIG, is a Chinese state-owned investment holding company wholly owned by Hebei province's SASAC and the province's largest state-owned capital investment company.

Hebei Construction Investment Energy Investment

Hebei Construction Investment Energy Investment (Jiantou Energy) is a Chinese state-owned power company investing in and operating coal-fired generation and district heating in Hebei Province.

Hebei Gas pipeline Network

The Hebei Gas Pipeline Network (河北输气管网) is a system of long-distance natural gas pipelines in Hebei Province, China, supplied by the Russia–China East Pipeline and LNG terminals.

Hebei Longshan power station

Hebei Longshan power station (河北龙山发电厂) is a coal-fired power plant in Shexian County, Handan, Hebei, and the first 600 MW-class subcritical air-cooled plant in the province.

Hebei Spirit oil spill

The Hebei Spirit oil spill (허베이스피릿호 기름유출 사고) was South Korea's largest marine oil spill, releasing 10,900 tonnes of crude oil off Taean in December 2007.