A recent post on soundproofing reminded me to ask this....

I'll probably need a new furnace for this winter. I was thinking of
asking the installer to mechanically isolate the main duct hookups
(return and output) from the furnace. So that the vibration of the
fan does not transmit throughout the house ductwork. Also have the
furnace itself set on an isolation mat to prevent vibration
transmission to the floor.

Do any HVAC installers here have any experience doing this?

Would the installer simply use maybe a 6 inch length of large flex
duct to make the connections to the main ducts? Or is there a rubber
band of some kind that can be inserted to isolate the duct work from
the furnace? To achieve a vibration break.

I have an audio listening/recording studio, so would like to eliminate
the need to shut off the furnace when recording. Currently the
furnace transmits a fairly high amount vibration into the ducts. I'll
also be ordering the quietest furnace I can find.