downdraft vs updraft furnace and ductwork
We are replacing our furnace with a 75K BTU high efficiency unit. We would like to reloate the furnace from the crawl space to the garage, and use the existing duct work in the crawl space. We live in the midwest and have hot summers with humidity and below zero temps in the winter.
Company A recommends using an updraft furnace and installing flex duct work w/hot-cold air vents placed at ceiling level. Our concern with the updraft unit is heating and cooling loss and condensation of the flex duct work. Anyone have any experience with this product?
Company B says they can use existing crawlspace duct work and install downdraft furnace. The cold air exchange will have 2-90 degree bends and 2-45 degree bends. Will these bends cause too much air restriction for the furnace to run efficently?