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Can we split tankless on-demand hot water unit for hydro air & domestic hot water?
Can anyone suggest a good way to use one whole-house on-demand lp gas tankless unit (Rinnai for example) and split its use so that it provides tank-less on-demand domestic hot water for a small house AND also provides hot water for an existing central air system (conventional with ducts and an outdoor condenser - one zone) which we want to convert to a hydroair heating system? We live in Putnam County, NY and we currently have an electric hot water heater and electric baseboard heat supplemented by a wood-burning stove. Can we install the on-demand tankless in place of the elec. water heater and hook it up to the air handler (install a hot water coil), get the lp gas to it and install controls that make it work properly? We don't want to install a boiler and an indirect storage tank because we don't have the physical space for the equipment. Plus, we think it'll be efficient and have a short-term pay back on the cost of buying and installing the equipment. Crazy? Complicated? Easy & smart? Thanks! Mike