The short answer to your question is Yes the SMX II can be used...I have installed them on all kinds of systems (even home systems) but...

The long answer is will Mermaid honor the warranty after you make the conversion ?

And do you really want to ?...It will be quite in depth to do it, and depending on what model Cruisair unit you have...Where & what to steal from it to make the change....It's not just a matter of the keypad/display (which is just that) The brains for the SMX are generally mounted on the unit (in a metal box) or in a box that is remotely mounted (this is likely if the Cruisair was converted from the 3 knob control)

The other question is what Mermaid unit are ...]]> Sat, 16 Jan 2010 09:53:54 -0500 http://marine-ac.com/forum/ac-system-controls/smx-ii-control-question/#p227 A/C System Controls http://marine-ac.com/forum/ac-system-controls/smx-ii-control-question/#p227 Hey all,

New member here......have a question about the SMX II control. I'm considering replacing my Cruisair 12K BTU unit with a Mermaid 16.5K BTU and was hoping to use the existing SMX II control that came with my Cruisair unit. Is this possible or do I have to use the control that came with the Mermaid unit? Any help appreciated.