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Split systems are preferred and widely used worldwide except in North America. In North America, split systems are most often seen in residential applications, but they are gaining popularity in small commercial buildings. Split systems are used where ductwork is not feasible or where the space conditioning efficiency is of prime concern. [33]
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.
Floating Air Ductless Split Systems: These split-unit air conditioners are produced in both single and multi zones. ZoneAire: Multi-functional portable air conditioners that offer both de-humidification and heating (on select versions). They include auto swing louvers, self-evaporation condensation systems, and a dual zone design, which ...
For most applications, the minimum or near-minimum SEER units are most cost effective, but the longer the cooling seasons, the higher the electricity costs, and the longer the purchasers will own the systems, the more that incrementally higher SEER units are justified. Residential split-system AC units of SEER 20 or more are now available. The ...
However lifetime cost relative to a gas boiler varies considerably depending on several factors, such as the quality of the heat pump installation and the tariff used. [105] In 2024 England was criticised for still allowing new homes to be built with gas boilers, unlike some other counties where this is banned.
Map of the Channel Tunnel. The Channel Tunnel is a 50.45-kilometre (31.35 mi) rail tunnel beneath the English Channel, linking the United Kingdom with France.At its lowest point, it is 75 m (250 ft) below the sea bed and 115 m (380 ft) below sea level.
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