Most Genset installs from the OEM have a Steel reinforced floor in the Genset compartment. It will hold any Genset that will fit in that compartment. The Genset maker does not supply the floor mount in the Motorhome. All you have to do is make sure when you slide in an Onan, that the ventilation is not obstructed by the Floor steel supports. Any wood can be cut out to get the required ventilation. Make sure you use the Onan muffler. Do not use an after market muffler to get it "quieter". After market mufflers not designed for a RV Genset will cause the Genset to run hotter than normal. Doug