Harman XXV "high-low" switch

[cantman]

I just took delivery of a Harman XXV for my office/lab. My satisfaction with the fit and finish
and the overall aesthetics of my new stove is very high. The vent and outside
air intake will be installed next week when I get the time to get into the rafters/roof.
My question has to do with a "High-Low" switch located on the vertical wall opposite the
main control panel. What does this switch do?

 

[GVA]

In high it gives full voltage to the distribution blower.
In low it cuts voltage allowing the blower to run slower Thus quieter.

 

[cantman]

I guess it also means that if the distribution blower runs slower,
less heat will be transferred to the room. What additional
advantages/disadvantages, other than sound level and heat
distribution, will occur?