Wise to replace boiler for increased ARV?

[Mike McCarthy]

In the midsts of a renovation (BRRRR) in a nice (A-level) neighborhood. Always looking for ways to improve the ARV, and have one upgrade that I'm on the fence about.

The gas boiler for this 1920's house is pushing 40 years old.  It works, but it's old and inefficient.  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?  There's not much flexibility in the budget, but it seems worthwhile if the the appraiser is likely to consider it in the valuation.

Thanks for any thoughts or opinions!