| http://www.w3.org/ns/prov#value | - I am on an install now, old construction/remodel- I have 6 and 7 supplies and 8 returns throughout the house, 2- 98% furnaces variable / modulating ect with dual air exchangers, and dual steam humidifiers , I will use a central return on small houses {or zones} with open layouts, or where cost is an issue, but for a decent FWA system, independant returns is the way to go...As far as the dampers
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