Office Buildings Product
SBS-3 was equipped with 10 transponder channels ANIK-C3 had 16. Attached to the top of each satellite was a 1.7-m-wide shared-aperture grid antenna with two reflecting surfaces to provide both 'transmission' and 'reception' beams. In the case of ANIK-C3, which operated in the high-frequency radio bands at 14 and 12 GHz, a combination of high transmission power and high-frequency band usage meant that much smaller antennas just 1.2 m across could now be situated on rooftops or office blocks. This marked a significant reduction in size from the 3.6-m-wide reception dishes used previously, which had been viable only for hotels and office buildings.
Growing numbers of modern buildings demonstrate how passive solar power can add flair to and subtract costs from tower blocks as well as family homes. Early practitioners include George Fred Keck and William Keck, who used air vents and wide eaves to ventilate and cool a number of private homes in the Chicago area in the 1930s, 1940s and 1950s. The first commercial office building with solar water heating and passive design is attributed to Frank Bridgers. The building, now known as the Bridgers-Paxton building and erected in Albuquerque, New Mexico, in 1956, was heated by a solar collector angled at 30 and facing S backed by insulated water heaters and heat pumps which could extract heat from stored water at temperatures down to 10 C. The building performed so well that, despite unusually cloudy conditions during the first year, only 8 of its heating requirements had to be supplied by the (electrically powered) heat exchanger.
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