Our 2019 3121 is closed up for the winter, but I'm 99% certain that we only have to vents in the living area, one on each end of the island. I don't remember having an additional one in front of the sofa. We also have a vent in the bedroom and one (round) in the bathroom. We haven't had any problem with the linoleum.
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2019 Montana 3121RL
2017 XLT 350 SCLB DRW 4X4
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