There is a new feature in Merlin 2.7.6 and its CSV reading & writting possibilities.
You can now define the unit for the durations and choose one of the following: Seconds, Minutes, Hours, Days, Weeks, Calendarweeks, Months and Years.
This is very practical in case you want to import project information in spreadsheets of MS Excel, Numbers, etc and need further calculations referencing duration data.
In this case simply choose the appropriate unit when exporting. Merlin will recalculate project durations if necessary in the output.