Re: Forced air heat duct work
It sounds like a combination of poorly designed duct system and distance. If you think of it as a fan the farther away you stand the less air you feel moving, the longer the run the more duct metal to steal heat, and the constant changes in size creates even more resistance. Why do you need to stay with rectangular ducts, round work just as well. Centering the furnace, providing you don't use the fireplace , would help balance the resistive load. You may need to install a chimney liner as a wood fireplace chimney may be to large to accommodate proper draft. You might want to consider upgrading to a high efficiency furnace that can be vented through the side of the house through PVC pipe.
Be sure you live your life, because you are a long time dead.-Scottish Proverb