It is winterized so the furnace(Heat) is not on.  

(I usually play this from my cell phone.)g) If it's winter, I'll turn up the heat. 

Are the heating systems separate per unit or is there one boiler?  

Heat is an emergency and this was my most trying set of calls.   

Like a Denver Like a Austin  Like a Charleston  Like Oregon and Washington  etc etc. you set yourself up for the chance for nice appreciation which you can roll tax deffered in a 1031.I see all the time on this site those wanted to know how others rolled up and are now owning lots of units or nice big multi family.Let me share one of my friends investing history here in Portland.bought a 4 plex sold i 2 years later and made some gain rolled that into an 8 unit sold 8 unit and bought a 20  ( realize each transaction was a 1031 so no tax paid and each transaction was market driven for cash)  sold the 20 and leveraged into a 51 unit just out of Salem Oregon.. now she has a 2.9 mil dollar asset.. ( now here is her only stumble and I advised her not to do it) she sold that within 18 months for a 500k profit and 1031 into a 300 unit in Oaklahoma city... well short story there within a year of not knowing what she did not know and only having knowledge of Portland renters who pay rent with no games . the Oak property just about broker here.. bad tenants bad management theives etc. she ended up having to move there and run the property herself.. was there a little over 4 years and last year as we had a heated up Multi market as we know she sold got her principal back which that only happened because she lived there and her and her daughter ran the property no PM... anyway she did another exchange so she could roll her equity out tax deferred and bought a nice 30 unit in North Portland for a 5 cap which is money she can take to the bank with no mid west drama..

It was built in 1972, has central HVAC with separate heat pumps for each unit.

The small fan install took me longer than the gas line hookup.On LOW heat (with the blower running) the insert heats the entire family room & adjoining kitchen.

We manage larger apartment communities that range from C to A class market rate apartment or mixed use buildings with most properties being over 50 units.On average our overall electric bill per months is around 8400, water around 6500 and gas in the heat of winter is around 21000!  

You can get the renovations done in mild weather, avoid huge heating/AC bills (or burst pipes if you do not keep the heat on in winter), and get it ready for rent at a time of the year when there is a lot of demand for rentals.

Everything from bad siding, structural issues, heating and air issues, ground grading, windows and the list goes on.