Thanks! I know it was an old thread but it was O'day specific, so I went with it. Somewhat leaning toward a larger unit and sacrificing the hanging locker to have comfortable sleeping conditions both forward and aft. The previous owner(s) had an undersized Mermaid unit and the duct work was all wrong. I believe I can make use of the water pump from the previous system but will need/want to set up the split discharge to the v-berth and saloon. Have replaced the teak toe rail and eyebrow, head, holding tank, hot water tank, all thru-hulls, standing rigging and will replace hoses, belts and pumps on the engine. Adding solar to charge batteries and new refrigeration. Grew up sailing Buzzards Bay and the Vineyard. Excited to explore the Chesapeake - appreciating the lack of wind during the summer.