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Thanks for the advice. I'll take your advice and have someone look over the design to ensure things are done properly. I thought it was simpler than it actually is.

The furnace does need combustion air. The air is being pulled into the furnace through returns in every room of the house(about 10 returns in total), and I was planning on putting 1 return into the...

Thanks for the help. You opened my eyes to some things I was not thinking about that could have been damaging to the system. I didn't find anything about minimum clearances for the system in...

I found the installer's guide, and the BTU rating is 80,000. All air is coming from inside the building, and it indicates that there needs to be 2 permanent openings communicating directly with an...

I only have the User's information Manual, which didn't provide much. The contractor didn't leave me with anything else.

I know you had mentioned that it's a bad idea to run the duct through the cold air return. Why would that be bad? Is it because it will make the forced air too cold? You had also said that "That...

Well I'm glad I posted in this forum before continuing on, as you have asked some interesting questions, especially about the limited space. The furnace I have is an American Standard Freedom 80...

The duct for the warm air is 6 inches, and is metal. The return air is just pulled through the floor joist cavities, and sealed with cardboard(I don't know what it's actually called)

I am finishing my basement, and building a utility room with my furnace and water heater. Because of maximizing my space in the usable area, I have a stud wall directly along my furnace(almost...

I am finishing my basement, and I am trying to run a branch duct off of the main duct. However, the exact place that I want to run the branch duct takeoff, there are cold-air returns from the first...