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I am starting a home renovation and converting the home from a hot water radiator system. I am trying to decide between a variable speed high efficiency hot air system vs a hydrocoil system. The variable speed high efficiency system will require three furnaces. It will save money upfront. I understand both systems will require humidification. Radiant heat had been considered for the kitchen and mud area and master bath but now this seems more like a luxury rather than a necessity. Master bath will be electric radiant. New ducts will supply both heat and ac. Please advise, I am looking for an efficient quiet system with good air purification as one of my kids has significant allergies.