Steam jet cooling uses a high-pressure jet of steam to cool water or other fluid media.
 Typical uses include industrial sites, where a suitable steam supply already exists for other purposes or, historically, for air conditioning on passenger trains which use steam for heating.
 Steam jet cooling experienced a wave of popularity during the early 1930s for air conditioning large buildings.
 Steam ejector refrigeration cycles were later supplanted by systems using mechanical compressors.
Free cooling is an economical method of using low external air temperatures to assist in chilling water, which can then be used for industrial processes, or air conditioning systems.
 The chilled water can either be used immediately or be stored for the short- or long-term.
 When outdoor temperatures are lower relative to indoor temperatures, this system utilizes the cool outdoor air as a free cooling source.
 In this manner, the system replaces the chiller in traditional air conditioning systems while achieving the same cooling result.
 Such systems can be made for single buildings or district cooling networks.
The Warm Air Research House is a historic house and research facility located at 1108 W. Stoughton St. in Urbana, Illinois.
 Built in 1924, the house served as a warm-air heating research facility administered jointly by the National Warm-Air Heating and Ventilating Association and the University of Illinois Department of Mechanical Engineering.
 Prior to the 1920s, the American heating industry had few formal testing procedures for their products, and home heating through warm-air ventilation ducts was still considered a novel concept.
 The National Warm-Air Heating and Ventilating Association began to test heating methods and systems in the Department of Mechanical Engineering's laboratories, but it eventually needed a model house in which to test its domestic heating systems.
 The two organizations commissioned the large Colonial Revival residence, which was designed by architect Loring Harvey Provine and graduate student Clarence Andrew Kissinger.
 Beginning in 1932, research on air conditioning and cooling systems was also conducted in the house.
 Following World War II, the facility became less useful due to the shrinking size of new American homes, and the university sold the house in 1946.
 Some of the technologies developed in the house include storm windows, forced-air heating, and heating duct size and positioning.
Shaft voltage occurs in electric motors and generators due to leakage, induction, or capacitive coupling with the windings of the motor.
 It can occur in motors powered by variable-frequency drives, as often used in heating, ventilation, air conditioning and refrigeration systems.
 DC machines may have leakage current from the armature windings that energizes the shaft.
 Currents due to shaft voltage causes deterioration of motor bearings, but can be prevented with a grounding brush on the shaft, grounding of the motor frame, insulation of the bearing supports, or shielding.
Mads Clausen (21 October 1905 – 27 August 1966) born in Elsmark, parish of Havnbjerg, municipality of Nordborg in Denmark, was a Danish industrialist and founder of Danfoss in 1933.
 He died in transit from Elsmark to Sønderborg.
Seasonal thermal energy storage (or STES) is the storage of heat or cold for periods of up to several months.
 The thermal energy can be collected whenever it is available and be used whenever needed, such as in the opposing season.
 For example, heat from solar collectors or waste heat from air conditioning equipment can be gathered in hot months for space heating use when needed, including during winter months.
 Waste heat from industrial process can similarly be stored and be used much later.
 Or the natural cold of winter air can be stored for summertime air conditioning.
 STES stores can serve district heating systems, as well as single buildings or complexes.
 Among seasonal storages used for heating, the design peak annual temperatures generally are in the range of 27 to , and the temperature difference occurring in the storage over the course of a year can be several tens of degrees.
 Some systems use a heat pump to help charge and discharge the storage during part or all of the cycle.
 For cooling applications, often only circulation pumps are used.
 A less common term for STES technologies is interseasonal thermal energy storage
Hydronics is the use of a liquid heat-transfer medium in heating and cooling systems.
 The working fluid is typically water, glycol, or mineral oil.
 Some of the oldest and most common examples are steam and hot-water radiators.
 Historically, in large-scale commercial buildings such as high-rise and campus facilities, a hydronic system may include both a chilled and a heated water loop, to provide for both heating and air conditioning.
 Chillers and cooling towers are used either separately or together as means to provide water cooling, while boilers heat water.
 A recent innovation is the chiller boiler system, which provides an efficient form of HVAC for homes and smaller commercial spaces.
The Danfoss Group is a global producer of products and services used in areas such as cooling food, air conditioning, heating buildings, controlling electric motors, compressors, drives and powering mobile machinery.
 The company is also active in the field of solar and wind power as well as district heating and cooling infrastructure that targets entire cities and urban communities.
 Danfoss employs approximately 24,000 people worldwide with its headquarters in Nordborg, Denmark.
The Weather Eye was a trade name for a Nash Motors-designed fresh-air system for automobile passenger compartment heating, cooling, and ventilating.
 The Nash "All-Weather Eye" was the first automobile air conditioning system for the mass market.
 The use of the Weather Eye name for automobile passenger heating and air conditioning systems continued in American Motors (AMC) vehicles.
Jørgen Mads Clausen (born 23 September 1948) is the chairman of the board of Danfoss, the large Danish heating, refrigeration and air conditioning company started by his father, Mads Clausen.
 He is also the chairman of DI, the association of the Danish Industry, and has a sizeable investment in the WaveStar wave energy project.

Question: Mads Clausen was the founder of what company that is a global producer of products and services that are used in areas such as cooling food, air conditioning, heating buildings, and controlling electric motors?
Answer: The Danfoss Group