hooking up a outdoor boiler to a open direct system

oliver5528 Posted By oliver5528, Sep 13, 2008 at 2:37 PM

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  1. oliver5528

    oliver5528
    New Member

    Jun 24, 2008
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    Loc:
    Northern Maine
    I purchased a new AFS900. Here is my current system. I have 1400 sqft of radiant floor heat that is heated by bock oil fired hot water heater. The system is a open system (domestic water is radiant water.) I also have a garage that is heated by a hotair furnace. My plans are to install plate exchanger on the cold in on the bock heater and install a air exchanger on the hot air furnace. I have a couple of issues. What size Plate Exchanger? Should I install a mixing valve for my domestic water 135 degrees or can I run my Woodmaster at a lower temp and still run the air exchanger in garage?
     
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