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2. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   The first mini-split system was sold in 1961 by Toshiba in Japan, and the first wall-mounted mini-split air conditioner was sold in 1968 in Japan by Mitsubishi Electric, where small home sizes motivated their development. The Mitsubishi model was the first air conditioner with a cross-flow fan.

3. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Split systems are used where ductwork is not feasible or where the space conditioning efficiency is of prime concern. [33] The benefits of ductless air conditioning systems include easy installation, no ductwork, greater zonal control, flexibility of control, and quiet operation. [ 34 ]

4. Minimum-cost flow problem - Wikipedia

   en.wikipedia.org/wiki/Minimum-cost_flow_problem

   The minimum-cost flow problem (MCFP) is an optimization and decision problem to find the cheapest possible way of sending a certain amount of flow through a flow network.A typical application of this problem involves finding the best delivery route from a factory to a warehouse where the road network has some capacity and cost associated.

5. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   Mini trunking is a term used in the UK for small form-factor (usually 6 mm to 25 mm square or rectangle sectioned) PVC wireways. In India, this trunking is available with self-fixing tape to ease installation. [14] In some countries including Iran, the term 'Trunking' is a channel that allows installation of switches and sockets.

6. Substation - Wikipedia

   en.wikipedia.org/wiki/Substation

   Substation design is aimed at minimizing cost while ensuring power availability and reliability, and enabling changes to the substation in the future. [14] Substations may be built outdoors, indoors, or underground or in a combination of these locations. [15] [16]

7. Transaction cost - Wikipedia

   en.wikipedia.org/wiki/Transaction_cost

   Transaction cost as a formal theory started in the late 1960s and early 1970s. [13] And refers to the "Costs of Market Transactions" in his seminal work, The Problem of Social Cost (1960). Arguably, transaction cost reasoning became most widely known through Oliver E. Williamson's Transaction Cost Economics. Today, transaction cost economics is ...