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Air handler with DX A/Cz and hydronic heat.
I have a property with two apartments that each have very small heating and cooling loads. I plan to heat with a central boiler and cool with separate systems.
My first thought was ducted mini splits for cooling and baseboard heat. That's a lot of equipment.
A new thought is an air handler with an a coil for cooling and a hydronic coil for heat. That's less piping and equipment.
My cooling load is 9k and heat is 14k. I have zero interest in any resistance backup for heat. Heating design temp is 10 degrees
I'm finding traditional condensers no smaller than 1.5 ton. That's too big. And a mini split heat pump looses output below 45F and would need to be way oversized (especially for cooling) to compensate. Plus the COP drops to 2-3.