I made the choice to reduce the size of my air conditioner and furnace as part of my remodel. The smaller system was less expensive, and I felt good that I was conserving energy. The system is much more quiet, and is just about as effective as the larger, noisy machines. Save money and energy by implementing smaller systems! You can also pick new air ducts and more stylish air registers, too to make the whole thing more efficient. Rich Myhre, San Rafael Resident.