Spending way too much money on gear is one thing but, turning off the heat in the winter or the A/C in the summer is going too far! It makes much more sense to re-design the HVAC system with a minimum of 25 feet of over-sized Acoustiflex ducts feeding the acoustically rated registers, keep the face velocity at the registers well below 100 feet per minute, add a return air system with face vel at 25 ft per minute or so, have a certified air balance company adjust the system to about .5 inches of water column positive pressure to keep the dust out and relocate the fan for the system to the back yard as far as possible from the sweet spot in the room.
