To: longz who wrote (1427018 ) 12/2/2023 9:27:04 AM From: Eric 1 RecommendationRecommended By
Read Replies (1) | Respond to The Asian/Japanese style duct less heating cooling system is very popular up my way Mini-split and multi-split systems [38] Multi-zone or multi-split systems are a common application of ductless systems and allow up to eight rooms (zones or locations) to be conditioned independently from each other, each with its own indoor unit and simultaneously from a single outdoor unit. Mitsubishi Electric and Toshiba in Japan, where small home size motivated their development. [39] [40] [41] Multi-zone ductless systems were invented by Daikin in 1973, and variable refrigerant flow systems (which can be thought of as larger multi-split systems) were also invented by Daikin in 1982. Both were first sold in Japan. [42] Variable refrigerant flow systems when compared with central plant cooling from an air handler , eliminate the need for large cool air ducts, air handlers, and chillers; instead cool refrigerant is transported through much smaller pipes to the indoor units in the spaces to be conditioned, thus allowing for less space above dropped ceilings and a lower structural impact, while also allowing for more individual and independent temperature control of spaces, and the outdoor and indoor units can be spread across the building. [43] Variable refrigerant flow indoor units can also be turned off individually in unused spaces.[ citation needed ] The lower start-up power of VRF's DC inverter compressors and their inherent DC power requirements also allow VRF solar-powered heat pumps to be run using DC-providing solar panels. en.wikipedia.org
