I'm considering replacing it because:* Can be marketed as a new, high efficiency heating system.* Less likely to break down and need repairs* Will cost about $2K to replace - and I think could add much more (I'd imagine $6-10K) to the appraised value.Is it worth it?  

Often, contracts have a seller representation that the major systems (e.g. heating system, plumbing) are in working order.

heat?).

The problem with aluminum wire is when it heats up the wire expands and contracts so over time it works its way free and touches something to start a fire.

Clay Nepsted of Clay's heating and Air is a personal friend of mine.

Then she and I renovate the house and sell in march-April next year when the school district buyers heat up? 

I have used and am happy with Mickle Electric and Heating.

It's a dry heat here. :)

Heat?

You may want to convert to gas for heating the 2nd floor and upgrade the electric to accommodate baseboard heat on the first floor since I'm assuming you'll hold this property long term so you'll want to make heat the tenants responsibility.