This is one of the things that sound a lot easier than they are actually done.The crazy thing I learned about these CA fires is that the heat radiation is hot enough (1500-2000F) that it will ignite your furniture through the windows.

The most commonly listed minimum is 5.5sqft.6 - Heating and Cooling element.

On the advice of the fireplace guy who did our last cleaning/inspection, we sanded down the brick inside and painted it with the high heat black paint, and it states in the lease that they may use a fireplace-style candelabra if they'd like, but any other use will trigger all the rules in the Fireplace Addendum.   

Estimated cost for remaining changes (all new electric, drywall, tile, fixtures, cabinets, roof, doors, windows, heat pump, some siding, and fencing.

Let Title put the heat on the seller to remit through them.

Are you in a market where water lines could freeze in the winter if there’s no heat?

I removed the chimney entirely and installed a full HVAC system, making it the only house on the block with modern heating and cooling.

Waiting for or getting the dreaded call that xyz was broken, flooded etc. which only happens after hours on weekend, holiday, during heat wave or snow storm. 

The agreement is contingent upon the buyer securing financing which I was not able to do and have provided a denial letter.The seller is requesting money for damages because the appraisal came in at the purchase price but needed a heat installed in the kitchen which the seller agreed to install (Not in writing).

Not sure how they could block a sale but I imagine they told him the central heating unit for the whole complex would soon need replacement so a special assessment would be upcoming.