I have a 90% efficient forced air gas furnace and when it was installed 4 years ago the guy didn't hook up a fresh air intake pipe allowing the furnace to draw in air from the hallway(slab home). My question is there are two holes for intake and I need to know if I should use one for the intake and block off the other or does it require two pipes? There is already a 2 exhaust leading outside thru wall.
The cost to replace your entire unit is around $4,000. That expense can range from $2,500 to $5,900, depending on the type and brand of furnace you choose. Brands particularly have an impact on that price. A Goodman electric furnace, will only cost about $2,100 for the unit and labor. On the other hand, a Trane oil furnace may cost up to $9,000 all things considered. Our Furnace Installation Cost Guide can give you a better idea on both the general cost and the differences for brands like Amana, Bryant, Coleman, and others. The brand also plays into the repair cost for your furnace. Especially the prices of individual parts can change; a York heat exchanger, for example, can cost up to $1,900, while the same component from Heil will cost as little as $400.