I have a 2017 450S owners version, with A/C. ?
If you have ducting, try to place units to minimize having to run or move additional ducts. ?In our case, I believe we have 4 units. ?One for each cabin, and one for the salon. ?The salon unit is under the bench seating in the salon, in the forward corner of the seat. ?The cabin units are under the beds behind the under bed drawers. ?Not sure on the BTU, as I am not on the boat currently. ?But I can check in a few days if you don't get an answer.
One note on the 220V and shore power. ?We also have 220V version. ?
Our unit works fine on the 50hz vs 60hz issue. ?Although people have said we should worry. ?The problem for us is voltage. ?The marina we are in runs 208V. ?And since we are on an end tie, we end up with 203-205V most of the time. ?The A/C runs, but will occasionally, (particularly the salon unit) will error out and shut down with a Low current message. ?When we run the generator, we haven't ever had an issue.
Good Luck.
Stuart
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Stuart
S/V Rum Away
2017 Lagoon 450S #33